trying to obtain data from a txt file but one column has negative values and ignores the - sign and leaves it as +

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isamh 2020-9-30

评论： isamh 2020-10-1

str = fileread('Wello.txt');

nums = cellfun(@str2double, regexp(str, '([\d.,]+)', 'match'));

DATA = reshape(nums, 3, [])';

this is the code above.

txt file is like this::

H G J

245 54 -45

output after code:

245 54 45

Ameer Hamza 2020-9-30

编辑：Ameer Hamza 2020-9-30

Why use regular expression here. Just use readmatrix()

M = readmatrix('data.txt');

Result

>> M
M =
   245    54   -45

For the regular expression in your question, you missed the minus (-) sign

str = fileread('data.txt');
nums = cellfun(@str2double, regexp(str, '(-?[\d.,]+)', 'match'));

Ameer Hamza 2020-9-30

Yes, ? make more sense here. Thanks.

isamh 2020-10-1

thank you both!

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