matlab matrix to svm format conversion

inputFormat
============
28.7967,16.0021,2.6449,0.3918,0.1982,27.7004,22.011,-8.2027,40.092,81.8828,g

svmFormat
=============
g    1:28.796700    2:16.002100    3:2.644900    4:0.391800    5:0.198200    6:27.700400    7:22.011000    8:-8.202700    9:40.092000    10:81.882800

code
=======

fid = fopen('magic04.data','r');
raw_data = textscan(fid,'%f %f %f %f %f %f %f %f %f %f  %c','delimiter',',');
data = [raw_data{1:10}];
class = raw_data{11};
fclose(fid);

svmTrain = fopen( 'magic04.data.svm' ,'w');
noRow = size(data,1);
noCol = size(data,2);
for r=1:noRow
    label = class(r);
    fprintf(svmTrain,'%s\t',label );
    for c=1:noCol
            fprintf(svmTrain,'%d:%f\t',c,data(r,c) );
    end
    fprintf(svmTrain,'\n' );
end
fclose(svmTrain);