How to speed up the xlswrite in for loop
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In my project, I have 166 different type of character set is there, Each character set have 280 images. For each character I got 140 feature extracted data. I am try to store this data in excel sheet. I am using this code. It works but it takes too much time like 150 hours to execute. How to speed up this code, My code is
B=[267; 279; 278; 271; 258; 258; 263; 269; 240; 266; 271; 249; 272; 264; 277; 271; 265; 272; 279; 268; 269; 272; 262; 273; 274; 268; 274; 280; 277; 264; 272; 277; 268; 277; 270; 275; 269; 270; 259; 276; 270; 266; 274; 279; 278; 270; 266; 276; 270; 277; 270; 274; 269; 272; 271; 279; 278; 277; 276; 278; 268; 268; 270; 270; 268; 266; 273; 256; 268; 271; 270; 277; 256; 276;
259; 276; 262; 269; 272; 269; 268; 261; 260; 273; 274; 275; 264; 276; 269; 276; 268; 268; 261; 256; 270; 279; 265; 260; 269; 258; 257; 263; 258; 276; 267; 269; 266; 274; 277; 270; 269; 261; 257; 259; 273; 272; 275; 270; 263; 274; 278; 274; 266; 269; 269; 259; 268; 272; 260; 278; 265; 268; 262; 273; 274; 278; 272; 267; 267; 270; 252; 238; 265; 258; 266; 275; 269; 271; 277; 280; 273; 276; 264; 265; 275; 275; 275; 264; 271; 266; 271; 266; 258; 264; 264; 254];
for i=1:166
x =cell(1,B(i));
f1=cell(1,B(i));
f2=cell(1,B(i));
cellRef_0 = sprintf('A1');
xlswrite('telugu_41-50.xls',i,i,cellRef_0);
for j=1:B(i)
cellRef1 = sprintf('B%d:CH%d',j,j);
cellRef2 = sprintf('CI%d:EK%d',j,j);
x{j} = imread(sprintf('E:/apps/project/TELUGU data/telugu sep/%d/ (%d).jpg',i,j))
f1{j} = feature_extractor(x{j});
f2{j} = feature_extractor_2d(x{j});
xlswrite('telugu_41-50.xls',f1{j},i,cellRef1);
xlswrite('telugu_41-50.xls',f2{j},i,cellRef2);
end
end
load handel
sound(y,Fs)
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