Modifying element of 2d array is condition met matlab

Question

i want to replace the element of array BW with element of array 'a' when element of BW is zero. Here is the code i have written

for i=0:row for j=0:col
if BW(i,j)==0 BW(i,j)=a(i,j); end
end end

i get error for if BW(i,j)=0

NKN · Accepted Answer · 2013-04-20 15:33:24Z

1

The easy way is:

BW(find(BW == 0)) = a(i,j)

answered Apr 20, 2013 at 15:33

NKN

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Comments

Oleg · Accepted Answer · 2013-04-20 16:01:15Z

0

No need for the loop.

Index the zero elements in BW then replace with corresponding element in a

idx = BW == 0;
BW(idx) = a(idx);

This solution assumes that a is at least as big as BW

answered Apr 20, 2013 at 16:01

Oleg

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