loading .txt file

Question

Jonathan 2011-10-26

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/19525-loading-txt-file

Hi, How do I load a file like this (3 lines):

-------------
#A=AY/func/7_corrs/broca_4mm_Z_2standard.nii.gz  B=AY2/func/7_corrs/broca_4mm_Z_2standard.nii.gz
--------------
#A           #B           #(A uni B)   #(A int B)   #(A \ B)     #(B \ A)     %(A \ B)    %(B \ A)    Rx(B/A)    Ry(B/A)    Rz(B/A)
--------------
127239       173524       204106       96657        30582        76867        24.0351     44.2976     0.9209     0.9803     1.3314
---------------

What I want to extract in Matlab is..

#A = 127239
#B = 173524
#(A uni B) = 204106

etc...

Thank you,

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Matt Tearle 2011-10-26

Can you please fix the formatting to show how the file appears. Thanks. Also, can you explain more how you want MATLAB to extract and package the information: do you want strings "#A = 127239" or variables A, B, etc with values 127239, ... Do you want those labels (A, B, ...) to be fixed or taken from a line of the file. And so on.

Fangjun Jiang 2011-10-26

use {}Code format next time.

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Answer 1

Matt Tearle 2011-10-26

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在 MATLAB Online 中打开

If you don't need individual variable names then I'd probably go with the simplest approach of

data = dlmread('data.txt','',2,0);

If you have missing values or error codes or other weirdness, then use textscan.

If you have Statistics Toolbox, another approach would be to use dataset to import the data as a dataset array:

data = dataset('File','data.txt','headerlines',1);

The downside is that the variable names will be hideous, due to all the non-valid characters. If you wanted to get vaguely fancy (and had some pattern to how to interpret the names), you could use regexp:

fid = fopen('data.txt','rt');
hdr = fgetl(fid);
hdr = regexp(fgetl(fid),'\t','split');
fclose(fid);
hdr = regexprep(hdr,'#','No_');
hdr = regexprep(hdr,'%','Perc_');
hdr = regexprep(hdr,'\W','');
data = dataset('File','data.txt','headerlines',1);
data.Properties.VarNames = hdr