[Le.Giang]

help xlsread

function m = csvread(filename, r, c, rng)
%CSVREAD Read a comma separated value file.
% M = CSVREAD('FILENAME') reads a comma separated value formatted file
% FILENAME. The result is returned in M. The file can only contain
% numeric values.
%
% M = CSVREAD('FILENAME',R,C) reads data from the comma separated value
% formatted file starting at row R and column C. R and C are zero-
% based so that R=0 and C=0 specifies the first value in the file.
%
% M = CSVREAD('FILENAME',R,C,RNG) reads only the range specified
% by RNG = [R1 C1 R2 C2] where (R1,C1) is the upper-left corner of
% the data to be read and (R2,C2) is the lower-right corner. RNG
% can also be specified using spreadsheet notation as in RNG = 'A1..B7'.
%
% CSVREAD fills empty delimited fields with zero. Data files where
% the lines end with a comma will produce a result with an extra last
% column filled with zeros.
%
% See also CSVWRITE, DLMREAD, DLMWRITE, LOAD, FILEFORMATS, TEXTSCAN.

% Copyright 1984-2006 The MathWorks, Inc.
% $Revision: 5.17.4.2 $ $Date: 2006/11/11 22:44:06 $

% Validate input args
if nargin==0
error(nargchk(1,1,nargin,'struct'));
end

% Get Filename
if ~ischar(filename)
error('MATLAB:csvread:FileNameMustBeString', ...
'Filename must be a string.');
end

% Make sure file exists
if exist(filename,'file') ~= 2
error('MATLAB:csvread:FileNotFound',...
'File not found.');
end

%
% Call dlmread with a comma as the delimiter
%
if nargin < 2
r = 0;
end
if nargin < 3
c = 0;
end
if nargin < 4
m=dlmread(filename, ',', r, c);
else
m=dlmread(filename, ',', r, c, rng);
end