Subscripting into an mxArray is not supported

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Gautham Nachimuthu
评论： Gautham Nachimuthu 2015-2-11
This is the part where i am getting error while converting to C code using Codegen.
w = 1;
yw1 = zeros(3,3);
r2 = 1;
c2 = 1;
for r3 = (r1-w) : (r1+w)
for c3 = (c1-w) : (c1+w)
_ *yw1(r2,c2) = y1(r3,c3);* _
c2 = c2 + 1;
if(c2 > g)
c2 = 1;
end
end
r2 = r2 + 1;
end
And y1 is a 512x512 matrix.
  2 个评论
Erik S.
Erik S. 2015-2-9
Hi,
In the second for loop you have underlines and stars, what are those? How does your C code look like?
Gautham Nachimuthu
Gautham Nachimuthu 2015-2-10
underlines and stars indicate bold and italicised text just to mark that line where i'm getting error.

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采纳的回答

Ryan Livingston
Ryan Livingston 2015-2-9
It sounds like you are using an extrinsic function and need to pre-assign the output.
Please see this similar question for more details on doing so.
  3 个评论
显示 1更早的评论
Ryan Livingston
Ryan Livingston 2015-2-10
You can use coder.varsize to declare the output to be variable size:
coder.varsize('y');
y = zeros(...);
y = callExtrinsicFunction(...);
Gautham Nachimuthu
Gautham Nachimuthu 2015-2-11
thanks a lot sir.. i'll try this out and let u know....

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