dlmread reads rows instead of columns

Question

Alexey Pustovarenko 2017-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/372272-dlmread-reads-rows-instead-of-columns

回答： Yaakov Shaked 2019-3-25

Hi all,

I have tried to import a column from a .txt file (contains 976 rows and 5 columns of numbers with a tab delimiter) using M = dlmread('filename.txt','\t',[0,0,5,0]), so M should contain first six elements of the first column. It gives 1x6 array instead: the first row of the txt file + 1 element from the second row. So it reads rows instead of columns. Am I missing something? How could I solve this problem? Sorry for my English.

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Answer 1

KL 2017-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/372272-dlmread-reads-rows-instead-of-columns#answer_295673

编辑：KL 2017-12-11

在 MATLAB Online 中打开

EDITED

something like the following,

dlmread(filename,' ',[0 0 4 0])

or use textscan,

filename = 'dummy.txt';
noRows = 5;
A = cell(noRows,1);
fid = fopen(filename,'r');
fspec = '%f %*f %*f %*f %*f\n'; % use * to ignore reading
for k =1:noRows
   A(k,1) = textscan(fid,fspec,1);
end
fclose(fid);