Taking input data from multiple files

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Bhaskar 2014-9-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/155929-taking-input-data-from-multiple-files

评论： Michael Haderlein 2014-9-25

Hey everyone I have multiple files by the name of outputfile0001.txt, outputfile0002.txt ... upto outputfile0060.txt . each file has a structure like this:

0.26630448E-08 0.62768422E+00
0.30589992E-08 0.64235565E+00
0.35138231E-08 0.65737000E+00
0.40362683E-08 0.67273529E+00
. .
. .and so on.basically two sets of numeric arrays gi(i) and rri(i)are there in these files.Now what i want is to is from each file plot(rri(),gi()).Any help is appreciated.I tried the code below with error that:'error in opening file'

numfiles = 60; mydata = cell(1, numfiles);

for k = 1:numfiles myfilename = sprintf('outputfinal%d.txt', k); mydata{k} = importdata(myfilename); end

回答（1 个）

Michael Haderlein 2014-9-23

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/155929-taking-input-data-from-multiple-files#answer_152672

在 MATLAB Online 中打开

myfilename = sprintf('outputfinal%d.txt', k)

will produce e.g.

outputfinal1.txt

To get the zeros in the filename, use

myfilename = sprintf('outputfinal%04d.txt',k)

Best regards, Michael

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Bhaskar 2014-9-24

for fid it shows:

Undefined function or variable 'fid'.

By the way i should mention that i am getting txt files from a fortran 77 program.

Michael Haderlein 2014-9-25

在 MATLAB Online 中打开

I mean, if you write the code line I have provided in the previous comment in your loop, before the importdata line. Then fid will have a value. -1 indicates that it cannot find the file, any other value (>2) indicates that the file can be accessed. Instead, you could also write

dir(fullNameWithPath)

to check if Matlab really finds the file.

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