Parameters from MATLAB function in Simulink

Hi

I'm writing a function in MATLAB. In this function I call a Simulink diagram with following command: sim('diagram', 'vxin', value) The error I get is: block_diagram does not have a parameter named 'vxin'. In the diagram I have a constant block where I entered vxin. Clearly this isn't the right way.

How can I fix this?

Thanks

[Santosh Gnanasekaran]

Probably 'vxin' is not in the base workspace as its value is undefined. you can assign any constant\variable in simulink pertaining to that particular block and then try again.

Answer 1

[A Jenkins]

It depends on how you want to manage the scope of vxin .

Simple option:

vxin=value;
sim('diagram');

or maybe you want something like:

h=get_param('diagram','modelworkspace');
h.assignin('vxin',value);
sim('diagram');