??? Subscripted assignment dimension mismatch. Error

Question

Adam 2014-5-26

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关闭： MATLAB Answer Bot 2021-8-20

Hi so Im getting this error when ever I try to run this section of code:

for i = 1:l

      C2(i,1) =  min ( G1(i,Xbp: Xep+3));    
end

C2 is a 616x1 matrix G1 is a 616x498 matrix

Why is this occuring all of a sudden I have ran this code on similar programs and this is teh first time it occured.

Thanks.

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Adam 2014-5-26

编辑：Matt J 2014-5-26

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Apologies this si more of the code:

        G1 = 255 * mat2gray (I2 , [1 100]);              
    C2 = 0 * I2 (:,1)+1;                                   
    for i = 1:l
          C2(i,1) =  min ( G1(i,Xbp: Xep+3));    
    end

I2 is a 616x498 matrix

l = 616

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Answer 1

dpb 2014-5-26

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Insufficient info to tell -- the problem would appear to be in what isn't shown.

Use debugger to stop on the error and examine the specific case values. Set

dbstop if error

then rerun.

The above code loop could be written as

C2=min(G1(:,G1(i,Xbp: Xep+3),2);

presuming that

I=size(G1,1);

If I<size(G1,1) then substitute the vector 1:I for I in the first subscript expression.

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Adam 2014-5-26

its an error carried through from actions taken in the code before this takes place. In this code it wants to go from Xbp to Xep (making Xbp the smaller value)but the error occurs because Xbp is larger than Xep.

So i need to go back and fix that from occuring.