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

3 次查看（过去 30 天）

Daniel 2013-12-22

评论： Daniel 2013-12-22

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!

Azzi Abdelmalek 2013-12-22

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!

Simulink Modeling Design Model Behavior Simulink Functions

在 Help Center 和 File Exchange 中查找有关 Simulink Functions 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by