How to get var from base workspace in test sequence

How to get var from base workspace in test sequence

[Rik]

I would never advise the use of evalin, especially not in a tester.

What are you actually trying to achieve? The answer below answers your question, but I expect you should be asking a different question.

(also, if the answer solves your question, you should click the 'accept answer' button)

[浩 程]

I want to use code to iterate a variable in a test sequence, which requires getting the change value from the workspace.

[浩 程]

Or how can I use code in the testsequence to get the value of output

[浩 程]

Thanks

[Stephen23]

"I want to use code to iterate a variable in a test sequence, which requires getting the change value from the workspace."

Pass it as an argument.

The approach you are attempting has a very strong smell to it: https://en.wikipedia.org/wiki/Code_smell

[Rik]

Why don't you supply the list of test variables in a cell array?

Making your test cases static helps keeping your tests stable. Without a consistent test, it is not possible to have a good regression test.

Answer 1

[Shubham]

Hi 浩 程,

In MATLAB, if you want to access a variable from the base workspace within a Test Sequence block, you can use the evalin function. The evalin function allows you to evaluate an expression in a specific workspace, such as the 'base' workspace. Here's how you can use it in a test sequence:

1. Double-click on your Test Sequence block to open the Test Sequence Editor.
2. You can use the evalin function in your test sequence actions to retrieve the value of a variable from the base workspace. The syntax is as follows:

varName = evalin('base', 'variableName');

Replace 'variableName' with the name of the variable you want to access.

3. Suppose you have a variable named threshold in the base workspace and you want to use it in your test sequence. You would write:

thresholdValue = evalin('base', 'threshold');

Remember that using evalin can make your test sequences dependent on the state of the base workspace, which might affect reproducibility and clarity.

[浩 程]

Ok, thank you!

[Tanmay]

Is it possible to modify the value of the base workspace variable from TestSequence Block?

[Walter Roberson]

@Tanmay Sonawane

You can use assignin

[Flavio Luiz Puhl Jr]

@Shubham, I am trying you solution but having this error

[Rik]

@Flavio Luiz Puhl Jr: once you're serious enough about what you're making that you're at the stage of code generation, you should rethink your strategy. This is a cludge solution. It works, but you shouldn't use it for anything that matters.