MCB2370U - LPC2378 - array size
In case of collecting data from external 3-channel ADC via SPI, what is the maximum possible array size in the program ? I tried for single channel and it appeared to be 127. However, when using 3-channel, high-pass filter (Butherworth, 2-nd order) and 4-stage 2nd-order IIR filter, it was reduced to about 30 samples (reduced memory size). I need at least 1500 samples, is it possible to put such amount of samples into single array for one channel ? I don't use multiple shift registers, but single shift register, through which the array is passed. I attached picture presenting simpler example.
Attachments:
vi.png 7 KB
Not a bug. This is correct behavior that is consistent with other parts of LabVIEW.
The decision to handle multi-dimensional arrays like this was made long ago and is an enshrined part of the LabVIEW language spec. It will not be changed.
Similar Messages
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Data type of preprend array size in Flatten To String block
Hi
The data type of the preprend array size in Flatten To String block is given as I32. Is it somehow possible to reduce the data type to I8, since the width and height of my array won't exceed 255 ?. I also need to do the same in Unflatten To String as well.
Best regards
OesenOesen wrote:
Hi
The data type of the preprend array size in Flatten To String block is given as I32. Is it somehow possible to reduce the data type to I8, since the width and height of my array won't exceed 255 ?. I also need to do the same in Unflatten To String as well.
The short answer is no. This is because the index is an I32. NI likes to keep integers as an I32 whenever possible for reasons like this.
Since you are dealing with a 2D array (width and height), it will actually use 2 I32s before the actual data.
As Ravens stated, you could put in your own array sizes before the array in the string. But it is worth saving 6 bytes? Not likely.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines -
Change array size and delete duplicate row
Hello,
I am running a program that does a for loop 3 times. In each loop, data is collected for x and y points (10 in the example provided). How can I output the array with the 30 points in a simple 2D array (size 2x30)?
Also, from the array, how do I delete duplicate rows that contain the same x-value?
Thanks,
hiNi.
Solved!
Go to Solution.
Attachments:
array size.vi 10 KBHello,
THANK YOU for solving my first issue! Attached is the data set that contains the duplicate entries for the x-axis values. The y-axis value may be different, but not the x. I would like to delete the 2nd row that contains the same x-value.
Here is simple example of my input and desired output:
IN:
28.512000 -115.310532
28.812000 -86.937660
29.112000 -116.877052
29.412000 -87.223625
29.412000 -111.349045
30.012000 -86.510780
30.312000 -112.048187
OUT:
28.512000 -115.310532
28.812000 -86.937660
29.112000 -116.877052
29.412000 -87.223625
30.012000 -86.510780
30.312000 -112.048187
I am thinking of comparig the last x-axis value to the current one, and if it is the same, then not parse that row. The attached VI is as far as I got.
Any help will be greatly appreciated.
Thanks,
hiNi
Attachments:
delete duplicate row.vi 8 KB
data.txt 1 KB -
Hello. I am trying to develop a VI for an FPGA target and I'm trying to make it so whoever is using the VI can specify the size of an input array when they instantiate it (such as by having an input to the VI that says "max array size" or something). So far it seems like the only way to do something like this is to go into the VI itself and manually set the array size for each input array for the VI (i.e. open the VI, right click on each input array, select "Set Dimension SIze", choose "fixed", set number of elements). I'd like to have one point where I can set the size of all the arrays at once (since in my case they are all the same size), and let the person using the VI set it to the proper size for whatever application they are using it for (to be clear, let's say I have two uses for this VI, and in one case I have an input array of size 100 and in anohter use of size 1000, I'd like to be able to set these somehow instead of doing it through the dialog). Thanks.
Solved!
Go to Solution.Unfortunately, per-call configuration of array size is not something that is supported today. This is a great idea, I would suggest that you post it on the FPGA Idea Exchange so we can get a feel for how many other people need this same feature.
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How do I determine array size in a formula node
I am feeding an array into a formula node to perform an operation on. However the size of the array can be an arbitrary size. How can I determine its size to use for iterating through a for loop?
I suppose that I could add another input that is fed with the array size from the array palate but I would like to know if it can be done inside the formula node itself.Your own advice is the only and best one.
greetings from the Netherlands -
Problem Array size in Windows 7
Hello All,
I have a VI that by opening in a new Laptop, it show some Arrays controls misfits (with a diferent array size), however i can´t put it right.
But when i make a EXE of this VI and if i run the EXE in another Computer, the front panel appears aligned and Ok.
I´m using the labview 2009 Sp1 with Windows 7, this vi have been created in another laptop in a older version and always with the Windows Xp, and whenever i was updated the version of labview it always appeared correct on those Laptop, until now when i changed the laptop and the Operating System to Win7.
Any help/advice is much apreciated
Thanks,
Solved!
Go to Solution.Make sure you use the same font settings for all the controls that you want to be aligned. You might have some controls set to a specific font name and others left to the default Application font. LabVIEW substitutes the Application font for whatever the system default font is on a particular computer.
Different fonts are default and available on different Windows versions so you can certainly get into trouble here if you mix font families and names in the same UI.
If you request a specific font name and it is not available on a certain machine Windows will substitute it with a different font that it thinks looks similar but the heuristics of that substitution can sometimes go really way south of the equator and simply give crazy results.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions -
Setting array size, effect on memory
Does setiing the array size to a huge no has any affect on the memory, performance and is it considered good programming. If not what are the other options?
String [] arrayString = new String [2354];Your question is rather ambiguously worded.
In Java arrays cannot be resized, so you should set the array to the exact size you need. If you need a huge array, create one. If you need a small array, create one. If you don't know how large it should be, or need it to be dynamically sized, use any of these great classes - ArrayList, HashMap, HashSet, etc... Try reading the Java API documentation on these classes...
And yes, when you create a huge array, it actually allocates the space for each element in the array right then, and in fact initializes each with the default values of null, zero, or false depending on the type of the array. -
How to adjust a "control array" size
I have a program that creates a digital PWM signal with variable duty cycle. The duty cycle changes every 50 ms, but the overall wave frequency stays at a frequency determined by the user. I have the VI attatched.
My problem is this...I need to be able to control the overall cycle time. This means the size of my array of duty cycles needs to adjust based on the cycle time (i.e. a cycle time of 1 second would require 20 of the 50 ms slots, while a 1.3 second cycle would need 26).
I currently have only 4 slots in my array, meaning the total cycle time is .2 s. I understand how to manually add and remove elements to the array, but I can't figure out how to add a control to it so that the array size changes automatically, allowing much quicker entry of data. As of now I can make it work, it just takes super long to add or delete array elements. The ideal situaton would have a constant control for cycle time divided by 50 that would change the array size.
I can't find any info on this, and I think I even saw a post asking that this kind of feature be added. I'm relatively new to this program.
Thanks
Solved!
Go to Solution.
Attachments:
var_duty_cycle.vi 25 KBCurrently, your VI is a one-shot deal. What you need is a state machine that updates the pct duty cycle array control as a function of the frequency while the current I/O code is idle.
I would use an array of clusters, where each cluster contains e.g. a sequence number, a duty cycle, and a string as element label. Show the scrollbar and set the size whenever the relevant inputs change. Do you want to reset the current setting when the number changes or do you want to retain the current settings as much as possible? You could just use the existing values, reshape to the larger or smaller size, and write it back to the control via a local variable. Set all elements except the percent to disabled so they act as indicators and cannot be changed by the user.
(You also need to program around it if the operator tries to manually add more elements. A better solution would be this idea, so vote for it .)
Some more general comments bout your code:
Why do you use extended precision floating point. All your waits are internally just integers. EXT makes no sense
There is a primitive for 1/x. However, you could just do a 1000/x and eliminate the multiplication afterwards. SInce you are dealing with integers, you can even do the division using quotient&remainder. Depending on the allowed frequency range there are possibly no orange data needed at all.
Make the diagram constant representation match the rest of the code.
The pulses/50ms indicator belongs before the loop. No need to recalculate and refresh it over and over from the same input values.
LabVIEW Champion . Do more with less code and in less time . -
There is a property in Oracle Forms "Query Array Size" that specifies the maximum number of records that Forms Developer should fetch from the database at one time. How to reaslize similar functionality through SQL or PL/SQL.
hi,
this is the OracleAS Portal Content Management forum. Please post your question in the Oracle Forms forum
Forms
thanks,
christian -
How to increase Array size while copying from remote table
Hi everyone,
I am using remote copy to copy 900,000(9 millions) records to local data base ,but it is taking long time obviuosly. The message i see while copying is
Array fetch/bind size is 15 (array size is 15)
can Array size be changed to make copy faster or
any otherway to copy 9 million reocrds fastly?
regards,
KarnaI guess that you are using the 'copy' command in sql*plus.
1. You could export the remote table and import the data into your local table. That perhaps would be efficient.
2. You could increase the array size for example,
SQL> show arraysize
arraysize 15
SQL> set arraysize 5000
SQL> show arraysize
arraysize 5000
SQL> What is the value for sql*plus option 'copycommit'?
SQL> show copycommit
copycommit 0
SQL> -
Java.lang.OutOfMemoryError: Requested array size exceeds VM limit
Hi!
I've a this problem and I do not know how to reselve it:
I' ve an oracle 11gr2 database in which I installed the Italian network
when I try to execute a Shortest Path algorithm or a shortestPathAStar algorithm in a java program I got this error.
[ConfigManager::loadConfig, INFO] Load config from specified inputstream.
[oracle.spatial.network.NetworkMetadataImpl, DEBUG] History metadata not found for ROUTING.ITALIA_SPAZIO
[LODNetworkAdaptorSDO::readMaximumLinkLevel, DEBUG] Query String: SELECT MAX(LINK_LEVEL) FROM ROUTING.ITALIA_SPAZIO_LINK$ WHERE LINK_LEVEL > -1
*****Begin: Shortest Path with Multiple Link Levels
*****Shortest Path Using Dijkstra
[oracle.spatial.network.lod.LabelSettingAlgorithm, DEBUG] User data categories:
[LODNetworkAdaptorSDO::isNetworkPartitioned, DEBUG] Query String: SELECT p.PARTITION_ID FROM ROUTING.ITA_SPAZIO_P_TABLE p WHERE p.LINK_LEVEL = ? AND ROWNUM = 1 [1]
[QueryUtility::prepareIDListStatement, DEBUG] Query String: SELECT NODE_ID, PARTITION_ID FROM ROUTING.ITA_SPAZIO_P_TABLE p WHERE p.NODE_ID IN ( SELECT column_value FROM table(:varray) ) AND LINK_LEVEL = ?
[oracle.spatial.network.lod.util.QueryUtility, FINEST] ID Array: [2195814]
[LODNetworkAdaptorSDO::readNodePartitionIds, DEBUG] Query linkLevel = 1
[NetworkIOImpl::readLogicalPartition, DEBUG] Read partition from blob table: partition 1181, level 1
[LODNetworkAdaptorSDO::readPartitionBlobEntry, DEBUG] Query String: SELECT BLOB, NUM_INODES, NUM_ENODES, NUM_ILINKS, NUM_ELINKS, NUM_INLINKS, NUM_OUTLINKS, USER_DATA_INCLUDED FROM ROUTING.ITA_SPAZIO_P_BLOBS_TABLE WHERE PARTITION_ID = ? AND LINK_LEVEL = ? [1181,1]
[oracle.spatial.network.lod.LabelSettingAlgorithm, WARN] Requested array size exceeds VM limit
[NetworkIOImpl::readLogicalPartition, DEBUG] Read partition from blob table: partition 1181, level 1
[LODNetworkAdaptorSDO::readPartitionBlobEntry, DEBUG] Query String: SELECT BLOB, NUM_INODES, NUM_ENODES, NUM_ILINKS, NUM_ELINKS, NUM_INLINKS, NUM_OUTLINKS, USER_DATA_INCLUDED FROM ROUTING.ITA_SPAZIO_P_BLOBS_TABLE WHERE PARTITION_ID = ? AND LINK_LEVEL = ? [1181,1]
Exception in thread "main" java.lang.OutOfMemoryError: Requested array size exceeds VM limit
I use the sdoapi.jar, sdomn.jar and sdoutl.jar stored in the jlib directory of the oracle installation path.
When I performe this query : SELECT BLOB, NUM_INODES, NUM_ENODES, NUM_ILINKS, NUM_ELINKS, NUM_INLINKS, NUM_OUTLINKS, USER_DATA_INCLUDED FROM ROUTING.ITA_SPAZIO_P_BLOBS_TABLE WHERE PARTITION_ID = ? AND LINK_LEVEL = ? [1181,1]
I got the following result
BLOB NUM_INODES NUM_ENODES NUM_ILINKS NUM_ELINKS NUM_INLINKS NUM_OUTLINKS USER_DATA_INCLUDED
(BLOB) 3408 116 3733 136 130 128 N
then the java code I use is :
package it.sistematica.oracle.spatial;
import it.sistematica.oracle.network.data.Constant;
import java.io.InputStream;
import java.sql.Connection;
import oracle.spatial.network.lod.DynamicLinkLevelSelector;
import oracle.spatial.network.lod.GeodeticCostFunction;
import oracle.spatial.network.lod.HeuristicCostFunction;
import oracle.spatial.network.lod.LODNetworkManager;
import oracle.spatial.network.lod.LinkLevelSelector;
import oracle.spatial.network.lod.LogicalSubPath;
import oracle.spatial.network.lod.NetworkAnalyst;
import oracle.spatial.network.lod.NetworkIO;
import oracle.spatial.network.lod.PointOnNet;
import oracle.spatial.network.lod.config.LODConfig;
import oracle.spatial.network.lod.util.PrintUtility;
import oracle.spatial.util.Logger;
public class SpWithMultiLinkLevel
private static NetworkAnalyst analyst;
private static NetworkIO networkIO;
private static void setLogLevel(String logLevel)
if("FATAL".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_FATAL);
else if("ERROR".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_ERROR);
else if("WARN".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_WARN);
else if("INFO".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_INFO);
else if("DEBUG".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_DEBUG);
else if("FINEST".equalsIgnoreCase(logLevel))
Logger.setGlobalLevel(Logger.LEVEL_FINEST);
else //default: set to ERROR
Logger.setGlobalLevel(Logger.LEVEL_ERROR);
public static void main(String[] args) throws Exception
String configXmlFile = "LODConfigs.xml";
String logLevel = "FINEST";
String dbUrl = Constant.PARAM_DB_URL;
String dbUser = Constant.PARAM_DB_USER;
String dbPassword = Constant.PARAM_DB_PASS;
String networkName = Constant.PARAM_NETWORK_NAME;
long startNodeId = 2195814;
long endNodeId = 3415235;
int linkLevel = 1;
double costThreshold = 1550;
int numHighLevelNeighbors = 8;
double costMultiplier = 1.5;
Connection conn = null;
//get input parameters
for(int i=0; i<args.length; i++)
if(args.equalsIgnoreCase("-dbUrl"))
dbUrl = args[i+1];
else if(args[i].equalsIgnoreCase("-dbUser"))
dbUser = args[i+1];
else if(args[i].equalsIgnoreCase("-dbPassword"))
dbPassword = args[i+1];
else if(args[i].equalsIgnoreCase("-networkName") && args[i+1]!=null)
networkName = args[i+1].toUpperCase();
else if(args[i].equalsIgnoreCase("-linkLevel"))
linkLevel = Integer.parseInt(args[i+1]);
else if(args[i].equalsIgnoreCase("-configXmlFile"))
configXmlFile = args[i+1];
else if(args[i].equalsIgnoreCase("-logLevel"))
logLevel = args[i+1];
// opening connection
System.out.println("Connecting to ......... " + Constant.PARAM_DB_URL);
conn = LODNetworkManager.getConnection(dbUrl, dbUser, dbPassword);
System.out.println("Network analysis for "+networkName);
setLogLevel(logLevel);
//load user specified LOD configuration (optional),
//otherwise default configuration will be used
InputStream config = (new Network()).readConfig(configXmlFile);
LODNetworkManager.getConfigManager().loadConfig(config);
LODConfig c = LODNetworkManager.getConfigManager().getConfig(networkName);
//get network input/output object
networkIO = LODNetworkManager.getCachedNetworkIO(
conn, networkName, networkName, null);
//get network analyst
analyst = LODNetworkManager.getNetworkAnalyst(networkIO);
double[] costThresholds = {costThreshold};
LogicalSubPath subPath = null;
try
System.out.println("*****Begin: Shortest Path with Multiple Link Levels");
System.out.println("*****Shortest Path Using Dijkstra");
String algorithm = "DIJKSTRA";
linkLevel = 1;
costThreshold = 5000;
subPath = analyst.shortestPathDijkstra(new PointOnNet(startNodeId), new PointOnNet(endNodeId),linkLevel, null);
PrintUtility.print(System.out, subPath, true, 10000, 0);
System.out.println("*****End: Shortest path using Dijkstra");
catch (Exception e)
e.printStackTrace();
try
System.out.println("*****Shortest Path using Astar");
HeuristicCostFunction costFunction = new GeodeticCostFunction(0,-1, 0, -2);
LinkLevelSelector lls = new DynamicLinkLevelSelector(analyst, linkLevel, costFunction, costThresholds, numHighLevelNeighbors, costMultiplier, null);
subPath = analyst.shortestPathAStar(
new PointOnNet(startNodeId), new PointOnNet(endNodeId), null, costFunction, lls);
PrintUtility.print(System.out, subPath, true, 10000, 0);
System.out.println("*****End: Shortest Path Using Astar");
System.out.println("*****End: Shortest Path with Multiple Link Levels");
catch (Exception e)
e.printStackTrace();
if(conn!=null)
try{conn.close();} catch(Exception ignore){}
At first I create a two link level network with this command
exec sdo_net.spatial_partition('ITALIA_SPAZIO', 'ITA_SPAZIO_P_TABLE', 5000, 'LOAD_DIR', 'sdlod_part.log', 'w', 1);
exec sdo_net.spatial_partition('ITALIA_SPAZIO', 'ITA_SPAZIO_P_TABLE', 60000, 'LOAD_DIR', 'sdlod_part.log', 'w', 2);
exec sdo_net.generate_partition_blobs('ITALIA_SPAZIO', 1, 'ITA_SPAZIO_P_BLOBS_TABLE', true, true, 'LOAD_DIR', 'sdlod_part_blob.log', 'w', false, true);
exec sdo_net.generate_partition_blobs('ITALIA_SPAZIO', 2, 'ITA_SPAZIO_P_BLOBS_TABLE', true, true, 'LOAD_DIR', 'sdlod_part_blob.log', 'w', false, true);
Then I try with a single level network but I got the same error.
Please can samebody help me?I find the solution to this problem.
In the LODConfig.xml file I have:
<readPartitionFromBlob>true</readPartitionFromBlob>
<partitionBlobTranslator>oracle.spatial.network.lod.PartitionBlobTranslator11g</partitionBlobTranslator>
but when I change it to
<readPartitionFromBlob>true</readPartitionFromBlob>
<partitionBlobTranslator>oracle.spatial.network.lod.PartitionBlobTranslator11gR2</partitionBlobTranslator>
The application starts without the obove mentioned error. -
Two instances of quirky behavior: array size of empty array and tab control freeze
LV 7.1
Array size of empty array. Adding empty arrays to an array of higher dimension produces a fantom array of non-zero size.
Tab control freeze. An event structure with checked 'lock front panel until the event case completes' option permanently freezes the front panel in certain special circumstances.
Zadortst wrote:
Tell me if you still think this makes sense.
Whew, let me look at this tonight after I activate the 4D module in my brain.
(I think it makes sense, though ) Generally I look at the product of the dimensions array to determine if an array is empty. You can initialize a multidimensional array with some dimensions at zero and it is reproduced nicely in the array size output. Also the "Empty array" tool correctly identifies it as empty, even if some dimensions are nonzero.
Message Edited by altenbach on 03-15-200612:42 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
init.png 3 KB -
Hi All,
I have a small question.I am using SunOS 5.9 and gcc 4.0 compiler.
Please take a look at the below code
When I compile the following program under gcc 4.0 it doesn't give me any compiler error and even the size comes correctly.
#include<stdio.h>
int main()
int c;
scanf("%d",&c);
int x[c];
printf("sizeof =%d\n",sizeof(x));
But when I use visual studio 2003 compiler it gives me error ( like cannot allocate an array of constant size 0).
I am bit confused as normall array size should be static rather during runtime.And I am not using malloc in this case also.
Could you please clarify this.Or is it possible to allocate the array size like this in advanced compilers?
Looking forward for your response.Hello.
I just tested initializing an array with a variable. It works under GCC 3.3.2. I know no other C compiler which is able to do this! In a C tutorial in the internet I found this:
You cannot initialize an array using a variable. [...] For example:
int x = 5;
int ia[x];Obviously initializing arrays with variables is a GCC extension.
If the compiler supports the "alloca" instruction you may use this instead:
int x = 5;
int *ia = (int *)alloca(sizeof(int) * x);
// sizeof(ia) is 4 or 8 (32 or 64 bit) here independent of xMartin -
Hi,
I am concatenating 9 arrays of 30 bytes each in order to build an 270 bytes array, but it seems that I can on read 170 bytes instead of 270.
even if I am tring to tile down my output array I cannot.Is there any limitation in terms of array size?Hello Reddy,
Here my code, I cannot expand my output array I don't know why?as I said I can only read 127 bytes approx.
Attachments:
concatenate array bytes1.vi 49 KB -
I think I may have stumbled across (another) PDA bug.
On my desktop the array size corectly returns the number of elements. On my PDA it returns zero - has naybody else witnessed this? My array is a 1D string with 8 elements.
Thanks in advance.I have got to the bottom of this one! It appears that there is an inconsistency in the operation of the Spreadsheet String To Array function.
For some reason I had made the array type terminal a plain string ( not an n-dimension array). On a PC this seems to work OK, when it is compiled for PDA it does not return an array.
By changing the string to a 2D string array it works on both the PC & PDA.
Does not work on PDA:
Works on PDA
ssk
Message Edited by ssk on 03-05-2009 07:53 AM
Attachments:
Works.JPG 16 KB
Does_Not_Work.JPG 15 KB
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