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Import text file with header

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Adelyn Luu
Adelyn Luu il 26 Feb 2013
Hi, I have a text file with header, I need to import the file to matlab and to use numeric data. The numeric data in a line is separated by a ",". The file is as following Thanks Adelynne
base shear
Analysis Series = cyclic2 (cyclic2)
Load Case = [2] = [1] + cyclic
0,-2.980232E-08
0.1,-24.82325
0.2,-87.0501
0.3,-75.9906
0.4,86.35868
0.5,281.4871
0.6,417.2569
0.7,521.8102
0.8000001,622.5663
0.9,711.8201
1,785.7328
1.1,838.6344
1.2,863.1584
1.3,857.4628
1.4,817.3618
1.5,700.1636

Risposta accettata

Jing
Jing il 26 Feb 2013
The functions that would be most helpful are 'fopen' and 'textscan'.
fid=fopen('yourtext.txt');
cdata=textscan(fid,'%f %f','delimiter',',');
fclose(fid);
  5 Commenti
Jing
Jing il 26 Feb 2013
just use textscan, and tell it you have how many header lines using HeaderLines options. Read Isakson's answer below...
per isakson
per isakson il 26 Feb 2013
Modificato: per isakson il 26 Feb 2013
cdata is a cell array. Read on cell array in the on-line help. And try
plot( cdata{1}, cdata{2} )

Accedi per commentare.

Più risposte (4)

per isakson
per isakson il 26 Feb 2013
... but don't forget the header
fid=fopen('yourtext.txt');
cdata=textscan(fid,'%f%f','delimiter',',', 'HeaderLines', 3 );
fclose(fid);

Azzi Abdelmalek
Azzi Abdelmalek il 26 Feb 2013
fid = fopen('file.txt');
line1 = fgetl(fid);
res={line1};
while ischar(line1)
line1 = fgetl(fid);
res{end+1} =line1
end
fclose(fid);
res(end)=[]
data=res(4:end)
a=cellfun(@(x) regexp(x,',','split'),data,'un',0)
x1=str2num(char(cellfun(@(x) x{1},a,'un',0)'))
x2=str2num(char(cellfun(@(x) x{2},a,'un',0)'))

Muthu Annamalai
Muthu Annamalai il 26 Feb 2013
z=textread('filename.dat','%s','delimiter','\n')
z=z(4:end)
q=regexp(z,',','split')
data = reshape(str2double([q{:}]),2,16)'

Miroslav Balda
Miroslav Balda il 26 Feb 2013
The simplest way to read such data is in using the function txt2mat fro the File Exchange:
www.mathworks.com/matlabcentral/fileexchange/18430
Should the name of your data be Adely.txt , the following statement does the task:
A = txt2mat('Adelyn.txt','InfoLevel',0);

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