MATLAB: Read text file

textread

Hi,

I have a text file which contains the following data format

abc (1:200, 200: 400)

bcd (1:300, 200: 300)

cde (1:100, 200: 500)

The first line tells me the number of lines to read in. How do I read in the values of the 2: 4th lines? I am using textread but it only returns the value of the first line.

Thanks. Charles

Best Answer

There are at least a couple ways you can try. One is to use the textscan() command.

I also like the readtext() command from the File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/10946 for this sort of thing.

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MATLAB: How to draw image based on four coordinates

P = [100, 300; 200, 300 ; 100, 400; 200, 400] ;  
x0 = min(P(:,1)) ; x1 = max(P(:,1)) ;
y0 = min(P(:,2)) ; y1 = max(P(:,2)) ;
I = imread('peppers.png') ;  
image([x0 x1], [y0 y1],I);

MATLAB: Convert from textread() to textscan()

Assuming the same file is being referenced for both:

fid = fopen(filename);
xyzcell = textscan(fid, '%f %f %f %f %f %f', 'HeaderLines', 3);
fclose(fid);
x = xyzcell{1};
y = xyzcell{2};
z = xyzcell{3};
X(:,k) = xyzcell{4};
Y(:,k) = xyzcell{5};
Z(:,k) = xyzcell{6};

Best Answer

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MATLAB: How to draw image based on four coordinates

MATLAB: Convert from textread() to textscan()

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