How to read this file in MATLAB?

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L'O.G.
L'O.G. on 28 Mar 2022
Edited: Stephen23 on 2 Apr 2022
I want to access the data in a file. The file is a TextEdit Document that appears to be unsupported. How do I do this? When I input fileID = fopen(filename,'r'), the command returns 3. I guess I will need to convert the file and then read it, but how?
  6 Comments
Mathieu NOE
Mathieu NOE on 28 Mar 2022
hi
if you simply want a numerical array you can use also readmatrix
out = readmatrix('test.trj.txt' ,"NumHeaderLines", 9)

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Answers (2)

Mahmoud Ashraf
Mahmoud Ashraf on 28 Mar 2022
load 'test.txt'
readtable('test.xls')

Stephen23
Stephen23 on 29 Mar 2022
Edited: Stephen23 on 29 Mar 2022
"I guess I will need to convert the file and then read it, but how?"
Why do you "guess" that? READTABLE has no problem importing the file data:
copyfile('test.trj.txt','test.trj') % just for this forum
fnm = 'test.trj';
opt = detectImportOptions(fnm, 'filetype','delimitedtext', 'NumHeaderLines',9, 'ExpectedNumVariables',7);
tbl = readtable(fnm,opt);
tbl.Properties.VariableNames = {'id','type','mol','x','y','z','bP'}
tbl = 54809×7 table
id type mol x y z bP __ ____ ___ __ __ __ __ 0 1 0 36 78 96 -1 1 2 0 37 79 95 -1 2 0 0 36 78 94 -1 3 0 0 35 79 93 -1 4 2 0 36 79 93 -1 5 0 0 36 80 92 -1 6 2 0 36 81 91 -1 7 2 0 36 82 90 -1 8 2 0 37 82 89 -1 9 5 0 37 83 88 -1 10 8 0 38 84 87 -1 11 1 0 38 85 86 -1 12 8 0 38 86 86 -1 13 2 0 39 85 86 -1 14 1 0 40 86 85 -1 15 2 0 40 86 86 -1
  2 Comments
Stephen23
Stephen23 on 2 Apr 2022
Edited: Stephen23 on 2 Apr 2022
"copyfile isn't ideal because the files are huge"
COPYFILE is, exactly as I wrote in my answer, just for this forum. Of course you do NOT need to use COPYFILE.
I just used it to get around the restricted file extensions that this forum supports. Another approach would have been to zip it up and then use UNZIP... but would you need to do that with your file? NO. Of course you use your file.

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