speed up xlsread

조회 수: 10 (최근 30일)
ricco
ricco 2011년 11월 24일
댓글: farzad 2020년 5월 23일
I have imported data from excel into matlab where I have several spreadsheets. I have used:
files = dir('*.xls');
%read data from excel into matlab
for i=1:length(files);
File_Name{i}=files(i,1).name;%Removes the file names from 'files'
[num{i},txt,raw] = xlsread(File_Name{i},'Ble min');
end
So, each cell refers to each spreadsheet. Is there a quicker way of doing this? I heard actxserver could be used, would this be the case for me here?
thanks

답변 (2개)

Image Analyst
Image Analyst 2011년 11월 24일

Karsten Reuß
Karsten Reuß 2017년 12월 5일
편집: Karsten Reuß 2017년 12월 5일
Small update on this one:
In versions of Matlab newer than 2013, readtable is much faster. I had some 300 files to import, xlsread took about 300 seconds, with actxserver about 100 seconds and with readtable 3 seconds.
You can then use table2cell, table2array, etc. to convert your data into cells and doubles.
  댓글 수: 1
farzad
farzad 2020년 5월 23일
>> tic;xls=xlsread(fname);toc;
Elapsed time is 2.230238 seconds.
>> tic;rdt= readtable(fname);toc;
Elapsed time is 2.156550 seconds.
>> tic;rdt= readmatrix(fname);toc;
Elapsed time is 2.511168 seconds.
It was a 14336 x 7 xlsx file. all numbers

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