Changing Output type in Formula Node?

I looked at some other posts on how to set a formula node output as an array, and am unsure why it is not an array. Here is the text in my node: ("out", "in1", and "in2" are all supposed to be 2D arrays; i is an int)
int32 out [50][50];
if (i==0)
out = in1;
else
out = in2;

Hi,
you must use something like
int32 out[50][50];
int32 j, k;
if (i==0)
for (j=0; j<50; j++)
for(k=0; k<50; k++)
out[j][k]=in1[j][k];
else
for (j=0; j<50; j++)
for(k=0; k<50; k++)
out[j][k]=in2[j][k];
I think this is because formula node must be precompiled before execution of your VI. In your case it doesn't know how to address different array elements of "in1" and "in2" because it doesn't know its sizes before you start your VI. In my example I specify the adresses of array elements by using indecies [j][k].
In any case it looks like you can't make direct assignment of arrays like "arr1=arr2". You always must assign its elements in a loop like "arr1[i]=arr2[i]".
Good luck.
Oleg Chutko.

Similar Messages

How do I get an array output on a Formula Node?

My problem is simply that I cannot figure out how to get an output on a Formula Node to be an array. Documentation states that "you must declare local arrays and output arrays in the Formula Node" but doesn't say anything more than than. Attempts to put something like "float32 out[100];" for an array output called "out" fail.
If anybody knows how you can do this or even knows if it is possible I would appriciate your help.
Thanks,
Naveen

I found a typo in the formula node I was doing that was making the output not be an array. I don't think I was getting the error before but I was going to put together an example VI to attach here and I found it. So, thanks for your help even tho it was a stupid little mistake on my part.

Changing output type in invoice

Hi All,
I need to attach the output type in alraedy processed invoices but as the invoices are in display mode in MIR4 I am not sable to do so.
Please advice how to do the same.
Thanks and Regards,
Manu
Edited by: Manu Agrawal on Sep 23, 2008 7:40 AM

Hi,
you must use something like
int32 out[50][50];
int32 j, k;
if (i==0)
for (j=0; j<50; j++)
for(k=0; k<50; k++)
out[j][k]=in1[j][k];
else
for (j=0; j<50; j++)
for(k=0; k<50; k++)
out[j][k]=in2[j][k];
I think this is because formula node must be precompiled before execution of your VI. In your case it doesn't know how to address different array elements of "in1" and "in2" because it doesn't know its sizes before you start your VI. In my example I specify the adresses of array elements by using indecies [j][k].
In any case it looks like you can't make direct assignment of arrays like "arr1=arr2". You always must assign its elements in a loop like "arr1[i]=arr2[i]".
Good luck.
Oleg Chutko.

Change output type of Purchase Order

Hi All,
Is it possible to programmaticlly change(or add) the output medium in transaction me21n / me22n when a user creates a PO?
I've been able to config the system to allow the PO to either be emailed or faxed upon the user saving. There is a requirement that when the user clicks the save button through a pop up window they can either choose fax or email, and it must then either fax the PO off, or it must email it depending on what they selected.
Is this possible?
Thanks!

U can do it, provide the desired Output types are configured in NACE.
Just look it in NACE > Output types 'EF' and select NEU click Processing routines,see what all output types defined.
Now Goto> tcode ME23n> choose an order> In essages>Check wether message type has the medium FAX or Email. Set the message Output type for ur desired and save,
Click on Further data and select at the time of saving.
For FAX you have to make some technical customizing in transaction SCOT in order to configure Fax connexion from SAP and then set the file fomrat you want for fax.
Remember that if you want to send Fax directly from SAP, SAP need to be connected to a Fax Card or a Fax Server .
Edited by: Bala Krishna on Aug 13, 2008 9:42 PM

How to change content in the formula node of the current vi

Actually I want to give formula with array index.
My formula p=a[0]-30; But i couldnot give array index in the formula expression..
Please help me in this issue.

Muthu92 wrote:
Thank you for your reply. It is very useful for me. But i can't give conditional operator in that operator. It is showing error.
My Test cases
A[0]+A[1]>150
A[31]-50 <100.
If those are your exact statements, then they don't make sense in a formula node. You have to use them in an if-statement or some other type of control logic. This mimics text-based programming languages such as C... See here for instructions on formula node syntax: http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/formula_node_syntax/
For instance, you COULD say something like:
**In this example, let A[0] == x, A[1] == y, A[31] == z**
if(x+y>150)
/* do something if this is true */
else if(z-50 < 100)
/* do something else */
EDIT:
It should also be noted that Variable Names MUST be lowercase!! I just discovered this
EDIT2:
I stand corrected. After trying to create an example and digging through the LabVIEW Help, I stumbled across this:
Differences between the Parser in the Mathematics VIs and the Formula Node
The parser in the Mathematics VIs supports all elements that Formula Nodes support with the following exceptions:
Variables—Only a, a0, ..., a9, ... z, z0, ..., z9, are valid.
Logical, conditional, inequality, equality—?:,, &&, !=, ==, <, >, <=, and >= are not valid.
Functions—atan2, max, min, mod, pow, rem, and sizeOfDim are not valid. You can use these functions in a Formula Node or use their corresponding LabVIEW functions.
So it DOES NOT seem like Eval Formula Node can do conditionals like you want. I would just implement them using a LabVIEW based algorithm after all. Trying to out smart the formula nodes to avoid simple LabVIEW code is just too much of a hassle
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If someone helped you out, please select their post as the solution and/or give them Kudos!

Want to change output type for 10000 sales orders through MASS

Hi Friends,
I would like to change the Output type in the sales order for 10000 sales orders.
Can I do with MASS transaction. If so, Plz let me know how ?
Is there any other process to change the output type for 10000 sales orders, as its difficult to manually in each and every sales order.
Its very urgent issue, Plz let me know at the earliest.
Thanks & Regards,
Praveen Kumar. A

This may be little tough for 10000 sales orders.
1. You have to remove the output record for the irrelevant output record using tcode VV12 for the relevant document type. So now for the document type, the old output wont be triggered.
2. Now, create output records for hte correct output type in VV11 tcode(for the output type BA03) for the document type. Now this output will be triggered for all the document types you are creating from now onwards.
3. To trigger the output type BA03, in all the old orders, you just have to open these sales orders in change mode (VA02), and just save it. When u open it the output type BA03 will be automatically triggered as the master data is maintained in VV11. But because just opening all the 10000 sales orders in VA02 one by one be a mechanical task, you have to think of some tool for this.
May be a CATT procedure can do the trick. Else, you can just create a small program, where you can upload these sales orders and the program will just open these orders in change mode and just saves it (without making any changes). Then the output will be retriggered.
Here again, if you are printing the output directly, it is advisable to trigger the output in batch mode(Date/Time field is 1 in VV11), and then you can again trigger the printing again using the program RSNAST00 after office hours for these 10k orders.
I hope I answered ur query.
Pls lemme know if you need some more info. (You can reward me too...)

PO Change output type

Hi Team,
I have created one Z-filed (Customised filed) in the Purchase order ,but when i do any change in that field the change output condition type is not triggering .
I want when i should change any value in the customised field the change output condition type should get trigger , So can you please help me what configuration i need to carry out to achieve this...
Regards
Tara

Hi,
Go to SPRO > MM > Purchasing > Messages > Fields Relevant to Printouts of Changes - Here add the Z-field with Table Name.
And then under option SPRO > MM > Purchasing > Messages > Output Control > Message Types > Define Message Types for Purchase Order > Fine-Tuned Control: Purchase Order - Here add o/p type with operation 2 i.e. change.
And now check the same in PO.

Problem in sales order change - output types

hi,
my output types is not displaying after i saved my output type
i assigned the Output message and saved it thru
Menu path : Extras->Output->header->Edit
when i viewed my thru Initial Screen from Menu Select : Sales Document->Issue output to...
my output types is not proposing .
Ganesh

check out the outtype determination in
SPRO->SALES & DISTRIBUTION->BASIC FUNCTION->OUTPUT CONTROL->OUTPUT DETERMINATION.
PLEASE REWARD IF USEFUL.

How to change output type of MI21 transaction ?

Hi All,
Whenever I am executing the MI21N transaction, its default output type is SAP Script.I want to get this output as a SMARTFORM. How can I do that ? Kindly advise on the same.
Regards,
Ankur Mishra

Hi Ankur Mishra,
Are you planning to print Physical Inventory Documents through Smart forms (MI21)? As this is related to MM, please post your question on SAP MM forum.
With Regards,
Srinivas

Formula node: type conversion

Hello guys
I have LV 5.0 and have to edit a script which has some kind of overflows. For testing I set all variables to the hightest usable range - extended or i32. Now I see, in all formula nodes, there are type conversions. How can I change the type of the inputs/outputs of the formula node?
Hardware_Tester
My first language is German, please ignore my faults...

Hi,
I forgot that you run Lv5.0. My example refers to Lv7.1.
As far as I know in Lv7.1 the input variable type changes automatically as you connect a control.
On the contrary the output is DBL by default but you can change it in the formula node introducing an explicit declaration of that variable (see "h" in the attached picture).
Here are some useful link:
http://forums.ni.com/ni/board/message?board.id=170&message.id=12253&requireLogin=False
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/d6bed7d73659c43586256a7300691c26?
Sorry, I understand that this cannot solve your problem but I don't remember how Lv5.0 works with formula node.
Regards
CLD - Labview Certified Developer
Attachments:
untitled3.gif ‏42 KB

Array output from formula node

How to get an array output from the formula node.I am trying to use a for loop inside the formula node and want an array output.

You cannot place a For or While Loop inside the formula node.
Here is what the Help Description says about the syntax inside the Formula Node:
Formula Node
Evaluates mathematical formulas and expressions similar to C on the block diagram. The following built-in functions are allowed in formulas: abs, acos, acosh, asin, asinh, atan, atan2, atanh, ceil, cos, cosh, cot, csc, exp, expm1, floor, getexp, getman, int, intrz, ln, lnp1, log, log2, max, min, mod, pow, rand, rem, sec, sign, sin, sinc, sinh, sizeOfDim, sqrt, tan, tanh. There are some differences between the parser in the Mathematics VIs and the Formula Node.
Place on the block diagram
Find on the Functions palette
Refer to Creating Formula Nodes and Formula Node Syntax for more information about the Formula Node and the Formula Node syntax.
Note The Formula Node accepts only the period (.) as a decimal separator. The node does not recognize localized decimal separators.
<SCRIPT type=text/javascript>if (typeof(writeVarRefs)=="function"){writeVarRefs("763");}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvrthelp763) != "undefined"){document.writeln(lvrthelp763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvfpga763) != "undefined"){document.writeln(lvfpga763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvemb763) != "undefined"){document.writeln(lvemb763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvpdahelp763) != "undefined"){document.writeln(lvpdahelp763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvtpchelp763) != "undefined"){document.writeln(lvtpchelp763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvblackfin763) != "undefined"){document.writeln(lvblackfin763)}</SCRIPT>
<SCRIPT type=text/javascript> if(typeof(lvdsp763) != "undefined"){document.writeln(lvdsp763)}</SCRIPT>
Example
Refer to the Create Function with Formula Node VI in the labview\examples\general\structs.llb for an example of using the Formula Node.

Delivery Schedule output type for change

Hi all,
i have created a custom output type for delivery schedule. i am using this output type to send IDoc. For create it is working fine. i have maintained condtion record as well.
whenever the delivery date and qty is changed, change output type is triggered but it fails there. the error shows no IDoc could be generated as there are no changes releveant to that.
i checked the configuration field relevant to printout changes, in that for table EKET-EINDT and menge i have checked the scheduling agreement. but here i could not find delivery schedule.
Can you please help on this..
Thanks

Hi
You need to confiugre output determination. Please check the below link.
Re: Email output of PO
output determination
Regards
Antony

Can I create array inside formula node

I need to create and use array (multidimensional) inside a formula node. My LabVIEW version is 5.1.The input and output from/to formula node do not necessarily being array. Thank you.

You need to declare a variable to be an array. To declare a multidimensional array of 32 bit intergers enter this:
int32 VarName[x][y];
Where x=1st dimension size (rows) and y=2nd dimension size (columns). You can then operate on this like you would an array in a text based language. Try the entering the example below in a formula node.
int32 i;
int32 y[5][2];
for (i=0;i<5;i++)
y[i][1] = x[i]+1;
Where y is an output and x is an 1D array input.
Hope this helps...
Brian

"Eval Parsed Formula Node VI" does not return outputs in predefined order

I make a data analysis program, where the data consists of some million events and each event has e.g. 4 channels and 1-5 hits on each channel.
I would like the user to select different expressions of these channels to give coordinates to plot in a 2D histogram (increment a bin in Intensity Graph), e.g. for some experiment you want to show x=ch1-ch2; y=ch1+ch2+ch3+ch4; while in another experiment you want x=ch1-123; y=123-ch2;
There are other VIs that use static LabView-code for the normal things, but now after a few years of adding to this program I find that it would be quite good with a general plotter and let the user specify simple expressions like this. Also with the "normal" static plots, there is a need to filter out bad data and then it would be much simpler both to program and use if you could write text expressions with boolean logic to combine multiple filters. Making a LabView code and GUI that allows AND/OR/parenthesis combinations of expressions will be quite an effort and not very reusable.
So, with the above motivation, I hope you see that it would make sense to have a useable string formula evaluator in LabView. I find some info about MathScript's user-defineable functions, but haven't managed to get MathScript working in LV2010 yet (maybe some licensing or installation issues, I think I had it in 8.6). But I think it would be possible to do most of what I want for the display-part (not the filtering) with the simpler Eval/Parse Formula Node VIs and suitable use of the limited variable name space. So I started testing, and found a quite annoying issue with how the evaulator works.
To the parser, you are expected to send an array of output variable names. But then it ignores this array, and returns one output per assignment/semicolon in the formula, in the order of the formula text. Since the static parts of my program need to know what the output values mean (which of them is x and which is y), I would have to rely on the user not using any intermediate variable and defining x before y. The attached screenshot demonstrates the problem, and also that it has been solved by NI statff in the "Eval Formula Node VI" which does the appropriate array-searching to extract only the pre-defined outputs, in their expected order. But using that VI is about 100 times as slow, I need to pre-compile the formula and then only use the evaulator in the loop that runs over a million events.
I don't know if I'll take the time to make my own tweks to the parsing stage (e.g. preparation of array-mapping to not have to repeat the search or maybe hacking the output list generated by the parser) or if I'll have to make it in a static Formula Node in the block-diagram (which supports more functions), so that the user has to run with development environment and stop the program to change the plotting function. But I wanted to share this trouble with you, in hope of improvments in future LabView versions or ideas from other people on how I could accomplish my aim. I have MATLAB-formula node possibility too, but is far as I have seen the only place the user could update the formula would then be in a separate .m file, which is re-read only when typing "clear functions" in the Matlab console window. (Having this window is also an annoyance, and perhaps the performance of calling Matlab in every iteration is not great.)
Besides this issue, it also seems very strange there is virtually no support for conditional expressions or operators in Formula Node evaulated formulas (called Mathematics VIs in the documentation). Maybe using (1+sign(a-b))/2 you can build something that is 0 when a<b and 1 when a>b, but it is not user friendly! Would it really be diffcult to add a function like iif(condition, return_value_if_true, return_value_if_false) to replace the unsupported "condition ? if_true : if_false" operator? Would it really be difficult to add support for the < <= >= > == || && operators? Although compiled to an assemply language, this can't exactly be difficult for a CPU.
Attachments:
LV script test.png ‏62 KB
LV script test.vi ‏18 KB

(1) You can put any kind of code inside an event structure with the limitation that it should be able to complete quickly and without user interaction. For example a while loop for a newton-raphson method is fine, but an interactive while loop where the stop condition depends on user iteraction is not recommended. By default, event structures lock the front panel until the event completes, so you would not even be able to stop it.
(2) Yes, you can do all that. LabVIEW has no limitation as a programming language. Use shift registers to hold data and state information, the manipulate the contents as needed.
(3) I would recommend to use plain LabVIEW primitives instead of formula nodes. Show us your code so we can better see what it's all about. Obviously you have a mismatch betweeen scalars and arrays. It is impossible from the given information where the problem is.
(4) Yes, look inside the nonlinear curve fit VI (you can open it an inspect the code!). One of the subVIs does exactly that. Just supply your model VI.
LabVIEW Champion . Do more with less code and in less time .

Array output from formula node with input variable as array size

Hi,
I have created a formula node with an array output called al, but I get an error "you have connected a scalar type to an array with that type".
I declare the output as follows..
float64 al[len_as];
where len_as is an scalar input to the formula node.
It only works when I put a number as.
float64 al[5];
,but I don't know beforehand how many elements I need, so I cannot use this.
Please help! This is so stupid.
Thanks

Don't define your array in your formula node.
Initialize the array as the size you want and pass it in as an input into the formula node.
Are you sure you even need to use a formula node? Can you implement your formula using all native LabVIEW functions?
Message Edited by Ravens Fan on 10-07-2009 11:51 PM
Attachments:
Example_VI_BD.png ‏3 KB

Changing Output type in Formula Node?

Similar Messages

Maybe you are looking for