The expression to the left of the equals sign is not a valid target for an assignment. ...? Error in line 3rd, " minOfBlocks = zeros(16,16); " ... Help me plz

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shiv
shiv 2016-2-22
评论： shiv 2016-2-23
I=imread('pepper.png');
c = mat2cell(I, [32 32 32 32 32 32 32 32 32 32 32 32 32],...[32 32 32 32 32 32 32 32 32 32 32 32]);
minOfBlocks = zeros(16,16);
subplot(1,2,1);
imshow(I);
title('Original Image', 'FontSize', 30);
for i=1:16
for j=1:16
a = c{i,j};
minOfBlocks(i,j)=min(a(:));
end
end
subplot(1,2, 2);
imshow(minOfBlocks, []);
title('Min of 32x32 Blocks', 'FontSize', 30);
  1 个评论
Matthew Eicholtz
Matthew Eicholtz 2016-2-22
I am having trouble reproducing your error. I see nothing explicitly wrong with the third line of code. Also, no need to say "Help me plz"; it won't get you answers any faster, I promise.

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回答（2 个）

Steven Lord
Steven Lord 2016-2-22
Did you literally type ... in the middle of the second line? If so, MATLAB is waiting for you to finish that function call on the next line and assigning a value into a variable in the middle of a function call is not allowed. Either remove the ellipsis (...) or move the code that follows it onto the next line.
Jan
Jan 2016-2-22
编辑：Jan 2016-2-22
The ellipsis "..." is an implicit comment starter also. So everyting right from '...' is ignorend, such that Matlab try to run:
c = mat2cell(I, [32 32 32 32 32 32 32 32 32 32 32 32 32],...
minOfBlocks = zeros(16,16);
As Steven told already insert a line break after the '...':
c = mat2cell(I, [32 32 32 32 32 32 32 32 32 32 32 32 32],...
[32 32 32 32 32 32 32 32 32 32 32 32]);
minOfBlocks = zeros(16,16);
By the way: The bunch of "32" is hard to debug. This is easier to read:
c = mat2cell(I, repmat(32, 1, 13), repmat(32, 1, 12));
  1 个评论
shiv
shiv 2016-2-23
Sir, Actually i am new in MATLAB.. I will replace c = mat2cell(I, [32 32 32 32 32 32 32 32 32 32 32 32 32],...[32 32 32 32 32 32 32 32 32 32 32 32]); with c = mat2cell(I, repmat(32, 1, 13), repmat(32, 1, 12));
then the error is Error using mat2cell (line 80) Number of input vector arguments, 2, does not match the input matrix's number of dimensions, 3.
Error in blks (line 17) c = mat2cell(I, repmat(32, 1, 13), repmat(32, 1, 12));

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