matlab read and write to file

how to write data into a file 

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csvwrite('attr20.ascii',A); 

 csvwrite(filename,M)
csvwrite(filename,M,row,col) 

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dlmwrite(filename, M)
dlmwrite(filename, M, 'D')
dlmwrite(filename, M, 'D', R, C)

dlmwrite('myfile.txt', M, 'delimiter', '\t', ...
         'precision', 6)
type myfile.txt

0.893898      0.284409      0.582792      0.432907
0.199138      0.469224      0.423496      0.22595
0.298723      0.0647811     0.515512      0.579807
0.661443      0.988335      0.333951      0.760365

http://www.mathworks.in/help/techdoc/ref/dlmwrite.html

 http://www.myoutsourcedbrain.com/2008/11/export-data-from-matlab.html

http://www.mathworks.com/matlabcentral/newsreader/view_thread/314766 

 http://www.mathworks.com/matlabcentral/newsreader/view_thread/314766

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Write dataset array to file

Syntax

export(DS,'file',filename)
export(DS)
export(DS,'file',filename,'Delimiter',delim)

 read to file 

M = csvread(filename)
M = csvread(filename, row, col)

http://www.mathworks.in/help/techdoc/ref/csvread.html 

more info type 'csvread' in matlab help 

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A = fread(fileID)
A = fread(fileID, sizeA)

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[A,B,C,...] = textread(filename,format)  

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http://www.mathworks.in/help/matlab/import_export/supported-file-formats.html 

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http://ocw.mit.edu/resources/res-18-002-introduction-to-matlab-spring-2008/other-matlab-resources-at-mit/tutorial05.pdf

FOR LOOP

http://www.cyclismo.org/tutorial/matlab/control.html

http://www.math.utah.edu/~wright/misc/matlab/programmingintro.html

http://www.cs.utah.edu/~germain/PPS/Topics/Matlab/plot.html

sub plot 

subplot(1,2,1), imshow('autumn.tif');
subplot(1,2,2), imshow('glass.png');

Function 

function [out1, out2, ...] = myfun(in1,in2, ...) 

Example

function [mean,stdev] = stat(x)
n = length(x);
mean = sum(x)/n;
stdev = sqrt(sum((x-mean).^2/n));