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How to read this file in MATLAB?

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L'O.G.
L'O.G. il 28 Mar 2022
Modificato: Stephen23 il 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 Commenti
Star Strider
Star Strider il 28 Mar 2022
The readtable function is able to read it. There are two non-empty entries in ‘Var8’ and ‘Var9’ that may be non-printable characters.
T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/943824/test.trj.txt', 'VariableNamingRule','preserve')
T1 = 54809×9 table
Var1 Var2 Var3 Var4 Var5 Var6 Var7 Var8 Var9 ____ ____ ____ ____ ____ ____ ____ __________ __________ 0 1 0 36 78 96 -1 {0×0 char} {0×0 char} 1 2 0 37 79 95 -1 {0×0 char} {0×0 char} 2 0 0 36 78 94 -1 {0×0 char} {0×0 char} 3 0 0 35 79 93 -1 {0×0 char} {0×0 char} 4 2 0 36 79 93 -1 {0×0 char} {0×0 char} 5 0 0 36 80 92 -1 {0×0 char} {0×0 char} 6 2 0 36 81 91 -1 {0×0 char} {0×0 char} 7 2 0 36 82 90 -1 {0×0 char} {0×0 char} 8 2 0 37 82 89 -1 {0×0 char} {0×0 char} 9 5 0 37 83 88 -1 {0×0 char} {0×0 char} 10 8 0 38 84 87 -1 {0×0 char} {0×0 char} 11 1 0 38 85 86 -1 {0×0 char} {0×0 char} 12 8 0 38 86 86 -1 {0×0 char} {0×0 char} 13 2 0 39 85 86 -1 {0×0 char} {0×0 char} 14 1 0 40 86 85 -1 {0×0 char} {0×0 char} 15 2 0 40 86 86 -1 {0×0 char} {0×0 char}
Vars_8_9_Info = [nnz(~isempty(T1.Var8)); nnz(~isempty(T1.Var9))]
Vars_8_9_Info = 2×1
1 1
Var_8_Content = cellfun(@double,T1.Var8(~isempty(T1.Var8),:), 'Unif',0);
Var_9_Content = cellfun(@double,T1.Var9(~isempty(T1.Var9),:), 'Unif',0);
.
Mathieu NOE
Mathieu NOE il 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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Risposte (2)

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

Stephen23
Stephen23 il 29 Mar 2022
Modificato: Stephen23 il 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 Commenti
L'O.G.
L'O.G. il 2 Apr 2022
copyfile isn't ideal because the files are huge, and readtable generates an error (ok on R2021b, but the error shows up on R2018a as having to do with readData)
Stephen23
Stephen23 il 2 Apr 2022
Modificato: Stephen23 il 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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