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Asked by pammy
on 28 May 2013

i've a one matrix named B = zeros(BmatRows, BmatCols);

here BmatRows remains the same in all of the cases but i want variation in BmatCols.

the code on pushButton is :

BmatRows=(rowImg-(blockSizeR-1))*(colImg-(blockSizeC-1)); BmatCols=blockSizeR*blockSizeC; B=zeros(BmatRows,BmatCols); for row=1:incrR:rowImg-(blockSizeR-1) rowStart=row; rowEnd=row+(blockSizeR-1); %rowEnd=row-blockSizeR+1; for col=1:incrC:colImg-(blockSizeC-1) colStart=col; colEnd=col+(blockSizeC-1); oneBlock=grayImage(rowStart:rowEnd,colStart:colEnd);

% Determine the selected data set. str = get(handles.popupmenu1,'String'); val = get(handles.popupmenu1,'Value');

% Set current data to the selected data set. switch str{val}; case 'Intensity' % User selects Intensity. vecOneBlock1= reshape(oneBlock,1,numel(oneBlock)); B(index,:)=vecOneBlock1;

case 'Entropy' % User selects GLCM. Entropy=entropy(oneBlock); vecOneBlock2= reshape(Entropy,1,numel(Entropy)); B(index,1)=vecOneBlock2; end end end

here i've mentionaed only two cases but i 've number of cases with varying columns.

case intensity works well BmatCols is correct.

in case of entropy here i want the BmatCols to be 1 i.e i want only one column in B matrix. here in the above code i wrote B(index,1), what it does is it only fills the first column and rest of the columns with 0s this i dont want.

in case of Blur Moment i want the BmatCols to be 6 i.e i want total of 6 columns.

plz tell me how to do so.

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Answer by David Sanchez
on 28 May 2013

If you want to get rid of columns you can use the following example:

B= rand(3); % 3x3 matrix B=B(:,1) % 3x1 matrix

In your entropy case, you can do the following:

vecOneBlock2 = reshape(Entropy,1,numel(Entropy)); B = vecOneBlock2;

You will not see your useless columns of zeros.

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