MATLAB: How to automatically increment the values of the variable name in a From/To Workspace Block in Simulink 6.4 (R2006a)

simulink

WIth a model with several To/From Workspace Blocks, I would like to increase an index in the variable names each time the model is run.

Best Answer

The attached model, increment.mdl, loads three variables from the workspace (a0,b0,c0) and then saves them as (a1,b1,c1). The initial a0,b0,and c0 are saved in initial.mat. The script incrementVars.m will find the variables referenced in the To and From Workspace blocks and increment the variable names.

If you want this code run automatically, you can call this MATLAB file from the Model's StopFcn callback (File -> Model Properties -> Callbacks Tab -> StopFcn).

Related Solutions

MATLAB: How to access variables in the model workspace from model callback functions

Model callbacks such as "InitFcn" can by default, only access the base workspace. In order to access model workspace variables, you need to do something like (within the "InitFcn" for example):

% Extract the model workspace obj
wksp = get_param('Model', 'ModelWorkspace'); 
% Extract the relevant model workspace variable
newVar = getVariable(wksp,'modelWkspVar');

MATLAB: How to change the value of a double variable in a .mat file

If your file is not big, just load your data, modify them, then save again your data

 %Look at this example
a.b1=1;
a.b2=2;
c.b1=1;
c.b2=20;
save fic a c
clear
data=load('fic','a')
a=data.a;
a.b1=0;
save('fic','a','-append')

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Related Solutions

MATLAB: How to access variables in the model workspace from model callback functions

MATLAB: How to change the value of a double variable in a .mat file

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