/usr/share/freemat/toolbox/io/csvwrite.m is in freemat-data 4.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | % CSVWRITE CSVWRITE Write Comma Separated Value (CSV) File
%
% Usage
%
% The csvwrite function writes a given matrix to a text
% file using comma separated value (CSV) notation. Note that
% you can create CSV files with arbitrary sized matrices, but
% that csvread has limits on line length. If you need to
% reliably read and write large matrices, use rawwrite and
% rawread respectively. The syntax for csvwrite is
%
% csvwrite('filename',x)
%
% where x is a numeric array. The contents of x are written
% to filename as comma-separated values. You can also specify
% a row and column offset to csvwrite to force csvwrite to
% write the matrix x starting at the specified location in the
% file. This syntax of the function is
%
% csvwrite('filename',x,startrow,startcol)
%
% where startrow and startcol are the offsets in zero-based
% indexing.
% Copyright (c) 2002-2007 Samit Basu
% Licensed under the GPL
function csvwrite(filename,x,firstrow,firstcol)
if (nargin == 2)
firstrow = 0;
firstcol = 0;
elseif (nargin == 3)
firstcol = 0;
elseif (nargin < 2)
error('csvwrite expects a matrix to write to the CSV file');
end
if (ndims(x) ~= 2)
error('csvwrite cannot write multidimensional arrays');
end
if (~isnumeric(x))
error('csvwrite cannot write non-numerical arrays');
end
if (isreal(x))
csvwrite_real(filename,x,firstrow,firstcol);
else
csvwrite_complex(filename,x,firstrow,firstcol);
end
function csvwrite_real(filename,x,firstrow,firstcol)
fp = fopen(filename,'w');
for i=0:(firstrow-1)
fprintf(fp,'\n');
end
if (firstcol > 0)
prepend_string = repmat(',',[1,(firstcol-1)]);
else
prepend_string = '';
end
for j=1:size(x,1)
fprintf(fp,prepend_string);
for k=1:(size(x,2)-1)
fprintf(fp,'%.20g',x(j,k));
fprintf(fp,',');
end
fprintf(fp,'%.20g',x(j,end));
fprintf(fp,'\n');
end
fclose(fp);
function csvwrite_complex(filename,x,firstrow,firstcol)
fp = fopen(filename,'w');
for i=0:(firstrow-1)
fprintf(fp,'\n');
end
if (firstcol > 0)
prepend_string = repmat(',',[1,(firstcol-1)]);
else
prepend_string = '';
end
for j=1:size(x,1)
fprintf(fp,prepend_string);
for k=1:(size(x,2)-1)
fprintf(fp,['%.20g','+','%.20g','i'],real(x(j,k)),imag(x(j,k)));
fprintf(fp,',');
end
fprintf(fp,['%.20g','+','%.20g','i'],real(x(j,end)),imag(x(j,end)));
fprintf(fp,'\n');
end
fclose(fp);
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