Statistical forecasting....Input and Output at different levels? & MAD and MAPE calculations

Team,
Couple of questions on Statistical Forecasting...
1) Is it possible to have input and output KF at different planning levels?...
2) Is there anyway to see MAD and MAPE values for each Forecast run?
Any help is appreciated....Thanks for your help...
Thanks,
Krishna

Hi Krishna,
#1 - The Inputs and Outputs should be at the same base planning level. Output should be a Stored KF. The input can be a calculated KF.
To achieve input and output at different plan levels, you can do something like this:
I/P KF1@PL1 (stored) Output: KF3@PL2
Create a Calculated KF: KF2@PL2 with calculation like SUM(KF1@PL1) and use this as input for StatFcst
#2 - The result of Fcst run MAD cannot be seen from Excel Client yet, we will address this in near release. If you are on-premise, you can see the results in table: sap.sop.sopfnd.catalogue::SOPFCS_FORECAST_RUNTIME_INFO_TAB
Hope this is useful.
Thanks,
Raghav

Similar Messages

Analog Levels vs SPDIF Levels Input and Output in Logic Pro

Hello,
I ran a test last night for recording input and output levels from my Yamaha Motif XS8 through an Apogee Ensemble to compare Analog to SPDIF
I connected two TRS cables from the L and R outputs on the Motif XS into the Analog Inputs on the Apogee and also have the SPDIF connection from the Motif to the Apogee.
I put the master fader all the way up on the XS for the volume for analog.
The ensemble in Maestro has a +4 and -10 reference notional level option for analog inputs. i had it at +4 but changed to -10 and the analog got louder (i figured it would get louder for +10, confusing).
anyways, why is it that I can record louder levels for analog than the digital transfer?
I tracked both options at the same time then recorded vocals over it. the digital sound is too low. what's up with that?
and when I tried to bounce the recording to listen to it in ITunes, the volume levels were way lower than my cd playing through iTunes. Please enligthen me on these?
I use to record in a Roland 2480, and had similar results with loudness, but got a little louder through mastering but still....pro cds are way louder and still clear.

I think there is much confusion here!
In summary, you wont be able to control the recording level of S/PDIF.
The reason is that you don't want to!
You need to think of the SPDIF connection as being more like a file transfer method. You are copying the digital data at an output to your harddrive in effect. If I send you an MP3 via email you'd never imagine that your email software is capable of changing the gain of the MP3 I send you. This might sound daft but its a useful analogy. If you need to increase the "volume" of that MP3 then you'd need to ask the sender. Its the same with your set-up.
There could well be somewhere on your synth that adjusts the instruments level, other than the master (analogue) output control. For example, make sure the midi volume of the intrument being played is set to full - ie midi vol 128. Perhaps there is somesort of virtual mixer onboard to control all the muti-timbral parts so make sure your part has its virtual fader turned up.
This is what (basically) is going on in the chain...
Your synth creates sound in its "digital brain". This sound is sent to an "output stage" which will distribute the sound to various outputs. In the case of the S/PDIF it will just send the raw digital data untouched. For the analogue side the digital signal (same as the one sent to S/PDIF) will be converted to analogue and then sent to a amplifier to get it to an appropriate "line level". This final level could well be controlled by an anogue volume control which could be adding more gain (than you think) too.
When things go to your sound card/ daw...
The purpose of a analogue gain control is to set the i/p signal so that it suitably loud to beat any noise that exists in your input circuits - so that a good signal to noise ratio is achieved. Analogue signals need to work in the right loudness zone (so to speak) as the analogue electronics will be designed to handle signal levels of a particular range. the gain control is there to make sure the signal is in that range.
Digital signals are far more predictable though and there is no advantage to your recordings if the incoming digital signal gets an increase of level at the input stage. All you are doing here is effectively adding a few zeros to the binary digital data!
Lets face it the point of recording is to get a copy of the original sound, that is as similar to the original as possible. With S/PDIF you get a perfect copy of what's coming out of your synth - so job's a good un!
If, when you come to mix in logic, you find the level of the digital recording is indeed too low for mixing/mastering purposes then just boost it in logic via a fader or via the gain plugin.
Those referrence values of -10dBV and +4dBu refer to analogue voltage levels only. they have nothing to do with the digital domain. The -10/+4 switch will be only relevant to analogue inputs and outputs. Using an analogue VU meter you should find that a sine wave that peaks at 0dBVU (totally different to 0dBFS BTW) is the equivant of a digital sine wave peaking at -18dBFS.
The analogue headroom (how loud you can go before things distort) depends on the analogue electronics and varies with different design. Analogue stuff, like mixers) often has headroom of 24dB or more. So that digital stuff can interface with analogue properly we allow for that analogue headroom to be around 18dB (usually enough in practise!)... hence -18dBFS(digital)=0dBVU(analogue).
To make your digital and analogue input signals sound similar in level you will probably have to reduce the gain of the analogue input. If you set the incoming analogue signal to peak around -14dB (or less!) or so you will probably find things more equal. If you are working in 24 bit your analogue levels can be seemingly very low before sound quality is affected. Its quite safe to record at -20 or even -30dB as shown on logic's meters for eg.
I hope all this waffle helps LOL!

Different family class used for input and output when working with sockets

I have seen more or less everywhere the following code to open a socket and to receive input and send output through it:
Socket server = new Socket("anyservername", 25):
OutputStream out = server.getOutputStream();
PrintWriter pout = new PrintWriter (out, true);
pout.println("Hello");
InputStream in = server.getInputStream();
BufferedReader bin = new BufferedReader (new InputStreamReader(in));
String response = bin.readLine();
What I do not understand is:
Why the BufferedReader needs InputStreamReader as an argument whereas printwriter does not want the OutputStreamReader as an argument but it is OK with just the OutPutStream?
I would tend to believe that they should be more or less at the same level and use the same arguments?.
In that sense if I use BufferWriter instead of PrintWriter I bet It should be OK the following code?:
OutputStream out = server.getOutputStream();
BufferedWriter bout = new BufferedWriter (out);
String myOut = bout.writeLine();
Cheers
Umbi
Edited by: Imbu on Jun 2, 2008 2:40 PM

1. Does it even compile?
2. While there is a fair amount of symmetry between reader and writer classes, don't assume it's exhaustive. Your best friend is the API:
[http://java.sun.com/javase/6/docs/api/]
3. Those were just examples. Code it the way you feel is best. I would specify charsets to make sure the encodings were platform independent. Networking and all that, don't you know...

How can I use a different driver for audio input and output?

I did a search of course, and came up with something about an aggregate. I have no idea what this is, how to do it, or if it would even work for me.
What I am trying to do is:
1) Record into Logic Express using my Tascam US-122.
2) Have playback come out of my computer sound system, not the Tascam.
If I go over to the Audio setup window, I can only record when the driver is set to Tascam US-122. Likewise, I can only listen to sound when my Built-In Audio is selected. It gets rather annoying going between the two.
So, would this aggregate thing solve my problem? If so, how do I do it? Thanks for any help!
-allen

Yes it should do what you want.
Go to "Audio Midi Setup", and go to the Audio menu and click "Open Aggregate Device Editor". The interface is pretty simple but if you do get stuck, just use the help function in Audio Midi Setup, as it has a step by step guide.
Then when you return to logic, go to the Preferences>Audio>Drivers section and select Aggregate Device as the new driver rather than either the built in sound or the tascam. Then the inputs and outputs will apply to BOTH devices.

Different input and output xml files [encoding]

Welcome. I write a little code that connect to ftp server, log in, than search an input xml file. That file is input for BufferedReader. This data are writing to local file. Im from poland and i wish use polish fonts and that fonts are broken in this output file (input is ok, it's write in editor that support utf-8 encodding)
Code of my program:
http://www.piotrkow.net.pl/~loko/xml_java/java_pyt.html
Input file:
http://www.piotrkow.net.pl/~loko/xml_java/agreeting[input].xml
Output file (totaly broken):
http://www.piotrkow.net.pl/~loko/xml_java/agreeting[output].xml
How do I fix this? Please help.
PS: Documentation used ftp libraries:
http://jvftp.sourceforge.net/docs/api/

Problem has been solved :)
--> http://www.piotrkow.net.pl/~loko/xml_java/java_solved.html

How to synchronize analog input and output from two different USB daq boards

Hi all,
I have two very differnt USB boards the NI USB 6008, which I am using to acquire the data (Analog Input) and a NI USB 9263, it is an Analog Output only board that I am using to deliver a signal (in this case a square pulse). The reason why I am not using the 6008 Analog Ouputs is because I need to deliver negative voltages and need the full +/-10V range.
Looking at similar posts I am pretty sure that I can't use an external trigger or a shared clock, I also tried to use the synchronization of timed structures but no cigar.
I am including a quick vi that I whipped out showing how the signal jitters due to the lack of synchronization. The AO from the 9263 connects to the AI in the 6008 in this example.
Solved!
Go to Solution.
Attachments:
Test Pulse.vi ‏117 KB

I talked to a specialist in the phone and tols me that it is not possible.

Selecting the Planning Level for Statistical Forecast in S&OP on HANA

Hello together,
we currently face an issue regarding the statistical forecast in S&OP on HANA:
The customer wants to implement an S&OP process containing the two steps statistical forecast (automatically calculated) and sales forecast (manually determined). The planning level of the statistical forecast should be higher than the planning level of the sales forecast, i.e. the statistical forecast is calculated on a higher planning level and then disaggregated to be an input for the manually determined sales forecast.
Since it doesn't seem to be possible to disaggregate any key figure below its base planning level we need to have the lower sales planning level as base planning level in all key figures, including the input and output key figures of the statistical forecast.
When running a statistical forecast with a defined forecasting profile, the planning level used for the forecast seems to be the base planning level of the input/output key figures defined in the forecasting profile.
However, we need to define a higher planning level for the statistical forecast in order to have a better data base for recognizing trends and sesonality. In APO DP it is possible to define the planning level for the forecast when running/scheduling the forecasting job. Is this also possible in S&OP on HANA? Can we define the planning level for the forecast in the forecasting profile or when running the forecast from the Excel AddIn? I tried to use the field "Filter" in the forecasting profile as it listed all the planning levels (as well as a lot of other things, we don't know where they come from), but the forecast was still carried out on the base planning level.
Do you have any other idea where to define the forecasting planning level that is different from the base planning level of the input/output key figures?
Thank you in advance,
Jonathan

Hi Bert,
thank you for your fast answer. I checked the forum again and found this post:
Question about Statistical Forecast
However, I don't really get how the disaggregation is meant to work; the suggestion seems to be to calculate a forecast on an aggregated level, i.e. with input and output key figure with an aggregated base planning level, and then disaggregate it "somehow".
Do you have any idea how this disaggregation might work and what other steps I have to consider?
It seems as if I'd have to define a whole bunch of new key figures and have more than one output key figure but no input key figure for the statistical forecast, which doesn't make sense in my eyes.
Actually I was looking for a solution where I can define my forecasting profile with both input and output key figure on the lower planning level and then insert the level I want the forecast to be done at either in the profile as well, or even more flexible when running or scheduling a forecast. Defining more key figures any time I need another forecasting level does not appear very comfortable. Is it meant to be like that or is there another way to reach the goal mentioned above?
Cheers,
Jonathan
Edit: The mentioned thread contains some valuable information on how to disaggregate key figures. However, the really tricky decision is how to define the disaggregation ratio.

Audio Line-in input and BT Headset output not working

Hi,
I'm trying to run the Line-in into my MBPro and route the output to my Logitech H800 BT Headphones at the same time (a pass through), but can't get it to work.
I have tried to run the line-in to the Internal Speakers and can not get this to work either.
Steps to taken:
1. Go to the Sound window by selecting the Sound icon from System Preferences.
Next, I route the Line-in by:
2. Selecting the Input button from Sound Effects, Output, Input buttons.
3. Select "Line In" from the Select a device for sound input list.
4. Select "Sound Input" from the Use audio port for drop down list
5. you should see activity on the Input Level.
6. Next, select the Ouput button from Sound Effects, Output, Input buttons.
7. Select "H800 Logitech Headset Stereo (or Internal Speakers) from the Select a device for sound output list.
8. Verify that "Sound Input" from the Use audio port for drop down list is still selected.
9. Also, verify that the Mute checkbox is not selected in either the Input or Output window.
10. NO SOUND :-(
11. If I pull up a radio station in a webbrowser, I can listen to it without issue. So, I think audio out is set correctly.
12. If I install Audacity: 1) It shows the audio input and output to be set as above (Built-in Input/H800 Headset). 2) If I record and then playback, it records the audio going in the Line-In and plays back accross the H800. 3) Also looked for a Monitor function in Audacity but could find one to test simulataneous I/O.
Any idaes welcome ?

ahh sry, thats how the line in works on my Mac Pro, I guess the Macbook is different. This is a program I use in conjunction with another called 'soundflower' to route my audio to all the places it needs to go:
http://www.macupdate.com/app/mac/11333/linein
If you need to run multiple instances, you can open up terminal and type
open -n /Applications/[PUT PROGRAM NAME HERE].app/
It will open up another instance every time you run that script.

Statistical forecast varies in back ground and foreground !

Hello friends,
When i generate the Statistical forecast at *product and plant* level in foreground it gives some values, then generate in background at *product and plant level* again it gives different values.Could you pl through me some lights on me.
Regards,
siva

Hello Siva，
Maybe you have different aggregation level for your foreground forecast and background job.
Please first check your 'aggregation level' setting in /sapapo/mc8e.
Or maybe you're using different forecast profiles for your foreground and backgournd.
Please check the settings in /sapapo/mc8t of the forecast activity.
Do you have "always use job profile" setting on?
You can also check the background run's result in SM37's spool file, to see on what level did it execute, and what forecast profile it used for each planning object.
You can check note 372939 to compare the results. In this note, you will have great tips on how to compare both results. Besides that, note 374681 will give you detailed information on how to have the selections when using mass processing.
Also, check the note 546079, which contains more informations on how to have Interactive and batch forecast to run equally.
Best Regards,
Ada
Edited by: Ada Lv on Jul 29, 2011 3:22 PM

My question has to do with analog input and triggering? Does anyone have any suggestions on how i can improve the attached vi so it can trigger on a 50kHz ten cycles pulse after the pulse has been sent out on the output?

Could you just look at this vi and tell me if i am doing anything wrong? I get errors that are different each time I change something. here are the inputs I am using
Output Side:
amplitude = 1
freuency = 50kHz
Sampling Frequency = 1MHz
3 of Samples = 200
Input Side:
Input Buffer 4000
trigger type = analog
pretrigger = 5
edge or slope = rising
scan rate = 500kHz
# of scans = 2000
Conditional Retrieval
mode = on
slope = rising
skip count = 0
level = .1
offset = 0
hysteresis = 0
So what we want to do is capture the ten
cycles of the 50k output pulse on the input and need to store that so we can plot it later, do you have any suggestions. we are using the PCI-MIO- 16E board.
Thanks,
Jarrod
Attachments:
InputOutput2.vi ‏88 KB

1) Toss the sequence frames (no flames please).
2) Set you read and have it ready to trigger before oing the output.
3) After the output, go back and read the data that is waiting for you.
4) If you have errors tell us what they are and under what conditions they occured.
End of Ben's suggestions for now.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

How to temporally match/save Input and Output Channels's data?

Hello, I have a voltage-input, voltage-output SISO system, and need to indentify its dynamic response (or transfer function) as a reference to a PID control. Without using the system identification toolbox, my goal is to generate/provide a sine sweep input (ranging 1Hz-5kHz for 10sec) to the system and to save the corresponding output response signal as well as the sweep input signal simultaneously.
I got a sample program online and am trying to modify it as attached, but I really need your advices/comments concerning several problems I am facing with:
1) With the below setting, the number of the acquired Input channel samples obtained is 5461, which is smaller than expected (i.e., 10000). What would I be missing in setting parameters?
- H/W: NI-USB-6341 DAQ
- AO: continuous samples with the waveform timing (1k sampling, 10000 samples => 10 sec, slower sampling just for testing purpose)
- AI: continuous samples, samples to read: 30k, rate: 1k
2) I am using flat sequence structure as a way to making the start point of saving AI and AO data same, but wonders if this is a right method or if there is other better approaches. (I had an idea of using an internal clock with "1-sample mode" for sync, but this may not work at the high speed sine sweep like 5kHz, right?)
3) I just want to provide the sine sweep just once to the system and do not require the "reset" functionality implemented in the original sample program. I failed to remove this "reset" part as I did not fully understand the sample code. If I run the attahed, the generated AO signal is periodically provided to the system. Please give me any advice to modify the program as I want.
Thanks for your help and valualble time.
Attachments:
siso.vi ‏230 KB

Hi J. Kim,
To begin, you say you want to synchronize your analog input and output so that they start at the exact same time, yes? To achieve tight synchronization, you need to use DAQmx VIs instead of the DAQ Assistant. There's a good overview of DAQmx VIs here. There's also a document that deals specifically with synchronization in DAQmx here. Additionally, if you go to Help>>Find Examples in the LabVIEW example finder, you can see many other examples of acquiring data using DAQmx.
As for your configuration, you have your analog input DAQ assistant wired far before your analog output DAQ assistant in your sequence strucutre, so the dataflow of the program will cause the analog input DAQ Assistant to execute before the output. They cannot be in different sequences if they are executing simoultaneously, and I would not use flat sequences here except to start the two tasks in DAQmx. Where did you find this example?
Best,
Dan N
Applications Engineer
National Instruments

Table name input. and output i need all rows and columns using procedures

hi,
question: table name input. and output i need all rows and columns by using procedures.
thanks,
To All

An example of using DBMS_SQL package to execute dynamic SQL (in this case to generate CSV data in a file)...
As sys user:
CREATE OR REPLACE DIRECTORY TEST_DIR AS '\tmp\myfiles'
GRANT READ, WRITE ON DIRECTORY TEST_DIR TO myuser
/As myuser:
CREATE OR REPLACE PROCEDURE run_query(p_sql IN VARCHAR2
                                     ,p_dir IN VARCHAR2
                                     ,p_header_file IN VARCHAR2
                                     ,p_data_file IN VARCHAR2 := NULL) IS
v_finaltxt VARCHAR2(4000);
v_v_val     VARCHAR2(4000);
v_n_val     NUMBER;
v_d_val     DATE;
v_ret       NUMBER;
c           NUMBER;
d           NUMBER;
col_cnt     INTEGER;
f           BOOLEAN;
rec_tab     DBMS_SQL.DESC_TAB;
col_num     NUMBER;
v_fh        UTL_FILE.FILE_TYPE;
v_samefile BOOLEAN := (NVL(p_data_file,p_header_file) = p_header_file);
BEGIN
c := DBMS_SQL.OPEN_CURSOR;
DBMS_SQL.PARSE(c, p_sql, DBMS_SQL.NATIVE);
d := DBMS_SQL.EXECUTE(c);
DBMS_SQL.DESCRIBE_COLUMNS(c, col_cnt, rec_tab);
FOR j in 1..col_cnt
LOOP
    CASE rec_tab(j).col_type
      WHEN 1 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000);
      WHEN 2 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_n_val);
      WHEN 12 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_d_val);
    ELSE
      DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000);
    END CASE;
END LOOP;
-- This part outputs the HEADER
v_fh := UTL_FILE.FOPEN(upper(p_dir),p_header_file,'w',32767);
FOR j in 1..col_cnt
LOOP
    v_finaltxt := ltrim(v_finaltxt||','||lower(rec_tab(j).col_name),',');
END LOOP;
-- DBMS_OUTPUT.PUT_LINE(v_finaltxt);
UTL_FILE.PUT_LINE(v_fh, v_finaltxt);
IF NOT v_samefile THEN
    UTL_FILE.FCLOSE(v_fh);
END IF;
-- This part outputs the DATA
IF NOT v_samefile THEN
    v_fh := UTL_FILE.FOPEN(upper(p_dir),p_data_file,'w',32767);
END IF;
LOOP
    v_ret := DBMS_SQL.FETCH_ROWS(c);
    EXIT WHEN v_ret = 0;
    v_finaltxt := NULL;
    FOR j in 1..col_cnt
    LOOP
      CASE rec_tab(j).col_type
        WHEN 1 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_v_val);
                    v_finaltxt := ltrim(v_finaltxt||',"'||v_v_val||'"',',');
        WHEN 2 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_n_val);
                    v_finaltxt := ltrim(v_finaltxt||','||v_n_val,',');
        WHEN 12 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_d_val);
                    v_finaltxt := ltrim(v_finaltxt||','||to_char(v_d_val,'DD/MM/YYYY HH24:MI:SS'),',');
      ELSE
        v_finaltxt := ltrim(v_finaltxt||',"'||v_v_val||'"',',');
      END CASE;
    END LOOP;
-- DBMS_OUTPUT.PUT_LINE(v_finaltxt);
    UTL_FILE.PUT_LINE(v_fh, v_finaltxt);
END LOOP;
UTL_FILE.FCLOSE(v_fh);
DBMS_SQL.CLOSE_CURSOR(c);
END;This allows for the header row and the data to be written to seperate files if required.
e.g.
SQL> exec run_query('select * from emp','TEST_DIR','output.txt');
PL/SQL procedure successfully completed.Output.txt file contains:
empno,ename,job,mgr,hiredate,sal,comm,deptno
7369,"SMITH","CLERK",7902,17/12/1980 00:00:00,800,,20
7499,"ALLEN","SALESMAN",7698,20/02/1981 00:00:00,1600,300,30
7521,"WARD","SALESMAN",7698,22/02/1981 00:00:00,1250,500,30
7566,"JONES","MANAGER",7839,02/04/1981 00:00:00,2975,,20
7654,"MARTIN","SALESMAN",7698,28/09/1981 00:00:00,1250,1400,30
7698,"BLAKE","MANAGER",7839,01/05/1981 00:00:00,2850,,30
7782,"CLARK","MANAGER",7839,09/06/1981 00:00:00,2450,,10
7788,"SCOTT","ANALYST",7566,19/04/1987 00:00:00,3000,,20
7839,"KING","PRESIDENT",,17/11/1981 00:00:00,5000,,10
7844,"TURNER","SALESMAN",7698,08/09/1981 00:00:00,1500,0,30
7876,"ADAMS","CLERK",7788,23/05/1987 00:00:00,1100,,20
7900,"JAMES","CLERK",7698,03/12/1981 00:00:00,950,,30
7902,"FORD","ANALYST",7566,03/12/1981 00:00:00,3000,,20
7934,"MILLER","CLERK",7782,23/01/1982 00:00:00,1300,,10The procedure allows for the header and data to go to seperate files if required. Just specifying the "header" filename will put the header and data in the one file.
Adapt to output different datatypes and styles are required.

Multiple inputs and outputs using DAQmx VIs

Hello,
I am fairly new with the LabView programming language. I have a few training books that I have been reading, and I have been following online tutorials and reading the forums. However, I have come to a problem where I don’t see a clear solution. I am using LabView 2009 (9.0f3) and DAQmx VIs.
I am using a NI 9172 chassis PLC, with two 9201 AI cards, 9217 AI RTD card, 9472 DO card, 9263 AO card, and two 9237 AI Bridge cards.
I am reading eight analog inputs with the 9201 cards, two analog RTD inputs with the 9217 card, three digital outputs with the 9472 card, three analog outputs with the 9263, and eight analog inputs with the 9237 cards.
I wrote a simple program to test one digital output task, two of the analog output tasks, and a single analog input task. I put all of them in the same while loop, and it worked perfectly. However, when I add analog input tasks to the same loop, I get an error 200022. So I tested each sensor individually by changing the channel before each run. I searched error 200022 and found that this is because I cannot start another analog input task until the previous one ends. With this said, I don’t know how to acquire an analog voltage in the same task as an analog RTD voltage. Both inputs take different constants in the start task DAQmx icon.
Attached is my test program. It is titled “Test All”. This is the program I used to test the various sensors. I tested the input sensors one at a time, and it worked fine. A few tasks are written just to test functionality, and will be added to later. The data is only displayed on the screen. I will add triggers and data write to disk functions later. This program works now, but if I add more analog inputs, it will generate the 200022 error.
Can someone show me how to correctly write the code for multiple inputs and outputs using DAQmx? All training materials and tutorials I can find all show a single input or single output, not multiples of each. Thanks for looking.
-Randy
Attachments:
TestAll-NI.vi ‏32 KB

Hi RandyC,
The Knowledge Base article Using Different Types of DAQmx Global Channels in the Same Task goes into a little more depth of what Bryan is talking about, and it also includes some example code to help show what to do.
Hope that helps,

How to get input and output using math interface toolkit

Hi,
I am fairly new to labview and i am trying to convert my labview code
into matlab mex files using math interface toolkit. I cant see any
input or output terminals when i try to convert the code to mex files
even though my vi has plenty of inputs and outputs that should be
available during conversion.
just to cross check i made another vi in which i inputted an
array of data to an fft and outputted it to an array again. i tried to
convert this code to mex files but was still not able to see any input
or output terminals, which makes me believe that i must be doing
something wrong at the very basic level and inspite of trying really
hard for some days now i have not been able to figure out that might be.
So please help.
I am attaching the basic vi that i created along with the link that i followed for converting labview code to mex files.
http://zone.ni.com/devzone/conceptd.nsf/webmain/EEFA8F98491D04C586256E490002F100
I am using labview 7.1
Thanks
Attachments:
test.vi ‏17 KB

Yes, you've made a very basic mistake. You have front panel controls and indicators but none of them are connected to the VI's connector pane. right click on the VI's icon and select "Show Connector". You use the wiring tool to select a connection there and then select a control or indicator. Use the on-line help and look up the topic "connector panes". There are some sub-topics on how to assign, confirm, delete, etc.

Input and output on same device, producer/consumer structure

Hello interested people,
I have a question about using the same device for both digital inputs
and outputs. I have written a simple program of one while loop
that continuously polls the device, processes, and requests. I
have addressed the device using two DAQmx Asst. and I have attached
them with their error in/out cluster terminals to provide data flow and
eliminate the chance of addressing the devices at the same time (which
produces an error). Now I want to change this program structure
to a producer/consumer loop foundation with state machine.
In this design, I will have the DI in the producer loop and the DO in
the consumer loop, under one of the states. I can't simply
connect the error in/out ports in this configuration, so my question is
how to avoid the error caused by addressing the same device
simultaneously with two different tasks (input and output)? I
have attached two VI's, the "One Loop" vi is the original configuration
(simplified), and the Producer-Consumer vi is a NONSENSICAL program
that simply represents the desired configuration. (I don't need
any comments on the programming of this vi, it is only an example for
illustration of the problem).
I am thinking about bundling the input data and the error cluster, both
from the PXI 6528 DI, into one cluster, queueing that up, and
unbundling the de-queued elements for some kind of data flow between
the producer loop and the "Request" state of the consumer loop.
Is this the right approach, or am I barking up the wrong tree?
Thanks
Attachments:
One Loop DO DI.vi ‏102 KB
Producer-Consumer DI-DO.vi ‏106 KB

Hello,
It sounds to me like you really have two modes:
1. user interface actions determine execution
2. user interface is locked, and execution is automated.
I think it would make sense to use the producer consumer for an architecture. Basically you would do the following:
1. program the producer to handle the user interface as you normally would.
2. provide one additional event case in the producer which would be your "automated handling" case. In that case, you could put a state machine which could run until whatever conditions were met to put your program back in "user interface mode".
Keep in mind that you can use custom USER EVENTS to programmatically generate events ie. you can trigger the start of your "automated handling" form anywhere in your code at virtually any time.
I think this would allow you to take advantage of the producer consumer architecture in its intended spirit, while integrating an automated routine.
I hope this helps!
Best Regards,
JLS
Best,
JLS
Sixclear

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