Can I access what's in the test vector in MatLab code during Main Test?

I saw a matlab page that talked about a getValue method, but I get an error saying "Attempt to reference field of non-structure array".

I don't think I understand what TestVector is, so that I can access its contents. The help really focuses on how to create them using the wizard.

Thanks

[James]

What I've sometimes done is created an input and signal straight to an output simply for a signal that's in the Test Vector (such as expected output), so that I can use it in a check as is appropriate. It's the easiest access I've normally found to it.

Answer 1

[Bart Addis]

If you create a MATLAB element in the Main Test, you'll be able to access the test vector directly by name. It will contain the value for the current iteration.

If you create a test vector T with values [1:1:10], then in iteration 3, T will have the value 3.

[James]

My test vectors are more complex than that. A single iteration corresponds to a single sheet of an Excel spreadsheet. Every row corresponds to a timestep within the iteration, and every column can be a piece of data (either mapped to an input port, or extra data that's just read in [this is what I want to access]).

[Bart Addis]

Are you using the Excel Test Vector to create these, or are you using xlsread?

[James]

The former, the wizard claims it evaluates to a 1x1 cell but I've realised - for example - TestVector1(1,3) does give access to the third element on the first row.

Answer 2

[Fangjun Jiang]

Is your test vector data a structure? The function to get its field is called getfield(). getvalue() seems to be a different function.

[James]

It's just what's coming from an excel spreadsheet. It says it's a 1x1 cell array - though if I read with different settings that can change.

if TestVector1.getField('Time') > 0

^^ doesn't work. The same error message.

[Fangjun Jiang]

It's a cell array so type TestVector1{1} in Command Window to see what is the value.

[James]

"Cell contents reference from a non-cell array object."

When I said it was a 1x1 cell array, that's what the Test Vector wizard says it "evaluated to".

[James]

That being an error message I quoted.

[Fangjun Jiang]

All right, go to Command Window, type who or whos, find the variable name for your test vector, type its name and see what you got. There are many other ways to inspect the variable, type workspace, or open('VariabeName')

[Walter Roberson]

What does

class(TestVector)

report?

[James]

erm, "??? Undefined function or variable 'TestVector1'."

The TestVector is within the SystemTest environment. MatLab code within the SystemTest environment doesn't produce output in response to commands like that (as far as I can tell anyway).

Thanks for the suggestions. The only way I've noticed to have access to the contents of the Test Vector is if it was created initially in matlab code (so contents are known), or if the data is passed through the model and read out from outputs.

[James]

Actually, "whos" does work, though "who" doesn't.

Name Size Bytes Class Attributes

TestVector1 29x5 1160 double

[James]

open() and class() don't work.

[Fangjun Jiang]

who give you a list of variables. whos gives more info such as Name, Size, etc. open('TestVector1') will open an Excel like interface for you to view and edit value. class(TestVector1) will return double.

[Fangjun Jiang]

Your TestVector1 is an ordinary 2-D double array. To access it, just type TestVector1 in Command Window and you'll see the value. To access individual element, use TestVector1(3,2) for example.

[James]

If you want to access SystemTest variables from the Command Window you need to use:

stresults.ResultsDataSet; // used after a test

// or

obj = systest.testresults.getCurrent;

currentResults = obj.ResultsDataSet; // used during a test

If you hadn't realised, I'm not trying to access it in the Command Window - but in a SystemTest Matlab code element.