MATLAB: When i run the program of data writting to a file i have got exponential data.how it will be in the decimel format

fprintf

    fprintf(fileID,'%d',data(x,y,z))

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fprintf(fileID,'%f',data(x,y,z))

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MATLAB: Writting error meesage

if r > 0.49   
    sprintf('The person is accepted.')
else error('The person is unccepted or not exist.') 
end

MATLAB: Writting strings to Excel

Your Labels is not a cell array of strings, despite the fact that your comment claims that. It's a character array and will therefore put one character into each Excel cell like what you're observing. You need to make it a cell array

Labels = {PLabels; SLabels};  % Note braces, not brackets.

Try that and let me know how it worked. Here's a complete demo with 3 cases to see how they work differently:

% This code works just fine.
PLabels = {'aaa', 'bbbb'} % Row vector cell array with 2 columns.

SLabels = {'ccc', 'dddd'} % Row vector cell array with 2 columns.
% Vertically concatenate the two row vectors into a single 2 by 2 cell array.
Labels = [PLabels;SLabels]; % 2 by 2 cell array of strings (two cell array joined)
xlswrite('delete me 1.xlsx',Labels,'Caract.Gnls.','A3');
% Case #2
% This code does not.
PLabels = ['aaa', 'bbbb'] % A single string 'aaabbbb'

SLabels = ['ccc', 'dddd'] % A single string 'cccdddd'

Labels = [PLabels;SLabels]; % Character array of strings
xlswrite('delete me 2.xlsx',Labels,'Caract.Gnls.','A3');
% Case #3
% This code also works just fine, but differently than case #1.
PLabels = ['aaa', 'bbbb'] % A single string 'aaabbbb'
SLabels = ['ccc', 'dddd'] % A single string 'cccdddd'
Labels = {PLabels; SLabels}; % Note braces instead of brackets.
xlswrite('delete me 3.xlsx',Labels,'Caract.Gnls.','A3');

I also highly recommend you re-read this section of the FAQ to get an intuitive feeling with how to deal with cell arrays: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

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MATLAB: Writting error meesage

MATLAB: Writting strings to Excel

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