Accessing variables from workspace into user-created function block in Simulink

Question

0 个投票

Good afternoon,

As the title suggests, I defined some variable say, x in the workspace that has a number.

Using MATLAB function, I am trying to import that variable (just once!) and as simulation progress, under

certain condition, I want to increment that variable. However, since the function does not 'see' the variable x,

I end up declaring that variable inside the MATLAB Function Block. However, this keeps initializing the variable

and thus, I cannot increment it.

I need help to resolve this problem!

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Answer 1

Azzi Abdelmalek 2013-12-22

1 个投票

You can declare your variable as persistent

function y=fcn(u)
persistent v
if isempty(v)
  v=your_constant
end
v=v+increment

Azzi Abdelmalek 2013-12-22

编辑：Azzi Abdelmalek 2013-12-22

At time =0 , v takes the value your_constant. And each iteration the variable v will be incremented. persistent allows to remember the value of v

Daniel 2013-12-22

Actually I figured it out. No need for an answer. Thanks for brilliant answer!