How to remove this error Improper assignment with rectangular empty matrix.

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Amit
Amit 2012-2-28
While running this file I m getting an error as ??? Improper assignment with rectangular empty matrix. I dont know what wrong I m doing? va is vector and d_va may have some nan value also.
b=floor(100-100*min(sp)); d_va=zeros(1,b);
for a=1:b
m=(100-a)/100;
xa=find(m-0.001 <= sp & sp <= m+0.001, 1, 'last' );
m2=m-(0.05*m/100);
xb =find(m2-0.001<=sp & sp<=m2+0.001, 1, 'last' );
va1=va(xa);
va2=va(xb);
d_va(a)=(va1-va2)*100/va1; % This line shows an error,??? Improper assignment with rectangular empty matrix.
end
end
  1 个评论
Andrew Newell
Andrew Newell 2012-2-28
It is easier to diagnose your code if you provide a complete working example (with values for the variables b, sp, etc.)

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回答（1 个）

Andrew Newell
Andrew Newell 2012-2-28
I can't reproduce your exact error message, but it is probably occurring because either va or vb are empty (there weren't any values of sp in the correct range). What you do depends on whether this is an error or it is o.k. If the latter, you could try something like this:
dva = zeros(b,1); % You should initialize dva
...
if any(va1) & val~=0 & any(va2)
dva(a)=(va1-va2)*100/va1;
end
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Tom
Tom 2012-2-28
you mentioned 'dv(a)', whereas in the code it is 'dva(a)'- have you got variables called 'dv' and 'dva' ?

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