read file with text and numericals

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shravani nethi 2019-11-15

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https://ww2.mathworks.cn/matlabcentral/answers/491228-read-file-with-text-and-numericals

评论： Walter Roberson 2019-12-21

采纳的回答： Johannes Neumann

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I have a file as follows

it contains 3 text lines at starting, data with 2 columns for every 3 lines which have 5 columns in each line.

How to read it in matlab?

example:

# this is line 1
# this is line 2
#this is line 3
25
14.34 25.98 576.6779 34.79080 
78.90 45.980 345.980 4534.809
70.39 234.32 34.456 456.00
25
31.6626 16.4479 6.9191 55.0296
149.629 105.448 231.137 486.214
0.000261389 44.6379 271.636 316.274
25
35.3791 12.0603 6.48611 53.9255
146.574 111.14 248.954 506.668
1.1585 64.3987 348.685 414.242

I need to separate line with 2 columns and lines with 5 columns

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Johannes Neumann 2019-11-15

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https://ww2.mathworks.cn/matlabcentral/answers/491228-read-file-with-text-and-numericals#answer_401619

编辑：Johannes Neumann 2019-11-15

Use textscan()

See e.g.:https://de.mathworks.com/matlabcentral/answers/160022-textscan-with-blocks-of-data-with-headers-to-individual-block

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Walter Roberson 2019-12-21

In particular, fopen() . fread() 3 lines and discard them. Then loop while ~feof()

cell2mat(textscan(fid, '%f%f', 1)) %to get the pair of numbers

cell2mat(textscan(fid, '%f%f%f%f%f', 3)) %to read the 5 columns

end of loop

each round storing the data somewhere appropriate

Though for your purposes, it might be easier to just loop using fscanf() as appropriate

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