struct initialization in Embedded Matlab (R2008B)

3 次查看（过去 30 天）

Guy Rigot 2015-7-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230786-struct-initialization-in-embedded-matlab-r2008b

Hi all,

I have a question regarding the initialisation of structs in embedded matlab in R2008B. I have the following example code in an embedded matlab block inside Simulink:

function out =    fcn(in)
% This block supports the Embedded MATLAB subset.
% See the help menu for details.
persistent states
if(isempty(states))
    states=init1();
    states=init2(states);
end
out=0
end
function [states] = init1()
states.stat1=0;
end
function [states] = init2(states)
states.stat2=0;
end

This code does not compile and gives me the following error:

"struct {stat1: double} ~= struct {stat1: double, stat2: double}. Structures don't match.
The struct to the left is the class of the left-hand side of the assignment.

Which makes sense, because indeed the two structs are not equal. Replacing the second init function call with:

states.stat2=0

works as expected. I want to do this within a function though... Do any of you know if there is a way of adding fields to the struct from within a function?

Cheers, Guy