limit the -ascii output to two decimal points

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sagarika rath
sagarika rath 2023-2-26
评论： Walter Roberson 2023-2-26
save(fullfile(PathName,filename),'x','-ascii');
how to save the files upto two decimals

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回答（1 个）

Walter Roberson
Walter Roberson 2023-2-26
Ran in:
You cannot do that -- the -ascii flag always outputs a number of digits . However you can
format long g
PathName = '.'; filename = 'test.txt';
x = rand(1,11).' .* 10.^(-5:5).'
x = 11×1
1.0e+00 * 2.49705612941576e-06 3.21530394035424e-05 0.000988743454538754 0.00709450963686247 0.00580482761786273 0.627987242677571 1.0061090249889 11.1394065600517 242.27180145787 3358.60943186604
%if you mean two digits after the decimal place
dlmwrite(fullfile(PathName, filename), x, 'precision', '%.2f')
dbtype(fullfile(PathName, filename))
1 0.00 2 0.00 3 0.00 4 0.01 5 0.01 6 0.63 7 1.01 8 11.14 9 242.27 10 3358.61 11 64152.44
%if you mean two significant digits
temp = round(x, 2, 'significant');
dlmwrite(fullfile(PathName, filename), temp)
dbtype(fullfile(PathName, filename))
1 2.5e-06 2 3.2e-05 3 0.00099 4 0.0071 5 0.0058 6 0.63 7 1 8 11 9 240 10 3400 11 64000
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sagarika rath
sagarika rath 2023-2-26
i tried to save the outputs two digits after the decimal using dlmwrite option and its not working.
Walter Roberson
Walter Roberson 2023-2-26
The above example shows that using dlmwrite with 'precision' does work.. well, except possibly not for infinite or nan values, or for non-numeric values.
What output are you observing when you try?

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