What do I use and where do I use it?

rgbImage = imread(fullFileName);
imshow(rgbImage); set(gcf, 'units','normalized','outerposition',[0 0 1 1]); drawnow;
[rows, columns, numberOfColorBands] = size(rgbImage); blockSizeR = 40; %Rows in block.
blockSizeC = 40; %Rows in column. 
wholeBlockRows = floor(rows / blockSizeR);
blockVectorR = [blockSizeR * ones(1, wholeBlockRows), rem(rows, blockSizeR)];
wholeBlockCols = floor(columns / blockSizeC);
blockVectorC = [blockSizeC * ones(1, wholeBlockCols), rem(columns, blockSizeC)];
if numberOfColorBands > 1
	ca = mat2cell(rgbImage, blockVectorR, blockVectorC, numberOfColorBands);
else
	ca = mat2cell(rgbImage, blockVectorR, blockVectorC);
end
plotIndex = 1; numPlotsR = size(ca, 1); numPlotsC = size(ca, 2); fileID = fopen('AB_45.xls','wt'); NewID = 'Book1.xls';
numbers = [];
for r = 1 : numPlotsR
    for c = 1 : numPlotsC   
		subplot(numPlotsR, numPlotsC, plotIndex);
		rgbBlock = ca{r,c};		imshow(rgbBlock); 
		[rowsB, columnsB, numberOfColorBandsB] = size(rgbBlock);
		caption = sprintf('Block #%d of %d\n%d rows by %d columns', ...
			plotIndex, numPlotsR*numPlotsC, rowsB, columnsB);
		title(caption);		drawnow; 
		plotIndex = plotIndex + 1;
        img1=rgbBlock;
        imshow(img1)
img2=imbinarize(img1,graythresh(img1)); imshow(img2)
img2=~img2; imshow(img2)
B = bwboundaries(img2); imshow(img2)
numbers = [numbers ; (length(B))];
hold on
for k = 1:length(B)
boundary = B{k};
text(10,10,strcat('\color{green}',num2str(length(B))))
 fprintf(' \n');
end
    end
end
xlswrite(NewID,numbers,1,'A1:AN40');

[Geoff Hayes]

Taofeek - from your above code, it looks like numbers is just

numbers= num2str(length(B));

which will be a positive integer converted into a string (not sure I understand why this variable is named "numbers" though). Rather than converting to a string, why not just leave this as an integer? And then create a column array of these integers which you will then write to your Excel file after you have completed all of your processing. For example,

% your code
numbers = [];
for r = 1 : numPlotsR
    for c = 1 : numPlotsC
        % your code
        numbers= [numbers ; length(B)];
        hold on
        for k = 1:length(B)
            boundary = B{k};
            text(10,10,strcat('\color{green}',num2str(length(B))))
            fprintf(' \n');
        end
    end
end
xlswrite(NewID,numbers,1,'A1:AN40');

[N/A]

https://www.mathworks.com/matlabcentral/answers/443610-what-do-i-use-and-where-do-i-use-it#comment_668535

George - I tried that but the excel file output only used 0 to fill all rows and colums which should not be.

[Geoff Hayes]

What is numbers being set to on each iteration of the loop? Please show your updated code.

Answer 1

[Image Analyst]

Assign numbers like this:

numbers(plotIndex) = length(B);

You need to define newID.

Also, call xlswrite() just once after your double for loop.

And your look over k just puts up a label for each boundary in the same place at (10,10), which seems unwise.

[N/A]

Can you explain further what you mean by how to assign number;

NewID has already been defined.

xlswrite() is occurring just once.

Can you kindly elaborate on what to do.

Thank you