Reading a file without extension

Question

Chris Dan 2022-4-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1707270-reading-a-file-without-extension

编辑： dpb 2022-4-28

采纳的回答： dpb

log.txt

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Hello,

I want to read a file in matlab which doesnot have an extension. I am attaching the file by converting the file to .txt file because otherwise it cannot be uploaded, originally the file doesnot have any extension and I want to read it without extension. I am using this code

cd /hamzah/adda/src/seq/results/test/run002_cylinder_g25_m1.105;
A = importdata('log')

The problem is that I want to read this file from line 1 till line 21, but when i use import data, I could only read till line 2.

Does anyone knows how it can be solved?

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Stephen23 2022-4-28

编辑：Stephen23 2022-4-28

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Do not use CD to import/export data files. Using CD is slow and makes debugging harder.

All MATLAB functions that import/export data file data accept absolute/relative filenames.

Do not use PATH as a variable name (it is the name of an important function), use e.g. MYPATH.

Replace this:

[mypath '/' folders(k).name '/log']

with FULLFILE:

fullfile(mypath,folders(k).name,'log')

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Answer 1

dpb 2022-4-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1707270-reading-a-file-without-extension#answer_953065

编辑：dpb 2022-4-28

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Take @Stephen's comments to heart; they're important.

D='/hamzah/adda/src/seq/results/test/run002_cylinder_g25_m1.105';
txt=readlines(fullfile(D,'log.'));

will bring in the file content as a string array. As a freeform text file, the content is simply too irregular for any of the prepared file routines to be able to handle.

The other technique for such files where generally one is interested in parsing one or more specific pieces of information is to use low-level i/o and fgetl(() and then parse each line in turn.

There are a number of examples of such on the Answers forum; I don't have a specific link but I know I've written several...