Saving variable of selected value from simulink matlab fcn to workspace

Hi, I need to save a variable's value from a Matlab fcn block in simulink into workspace for use. But I only want to save the value under certain condition, so there's a IF statement , so something like ias_temp=0;

if(...)

   ias_temp=input;

   save ias_temp into workspace;

end

it's sort of like to create a memory where you can store a value and hold it over there until you rewrite to it next time.

In addition, I will be using the variable in the Matlab fcn block also, so I need to read the value saved in workspace.

Is there any way to do this? I've tried a lot of ways but they don't work as I wanted it.

Thanks!

yida

Answer 1

[Azzi Abdelmalek]

assignin('base','variable_name',your_fcn_variable)

[yida]

Hi Azzi, it seems to be working. except for that a eml.extrinsic('assignin') needed to be added. So in addition, how can you retreive the value?

Thank you!

Answer 2

[Kaustubha Govind]

Is there a reason the value needs to be stored to the MATLAB workspace? You could either use a persistent variable if the value will only be used in the MATLAB Function block, or to share the data globally, see Share Data Globally.

[yida]

Hi Kaustubha, I tried the persistent variable, but it does not work. I have to store it somewhere else. Otherwise, it is just gonna either be overwritten by values I don't want or it will create error which says something like variable not defined in all executive paths...

[Kaustubha Govind]

yida: Could you paste some sample code on how you are using the persistent variable?