removing the text data by only keeping the numerical values

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Abhijit Sardar
Abhijit Sardar 2021-4-21
评论： Adam Danz 2021-4-22
I want to remove all the text present before the two columns with numerical values.I have several files like this how can i do it for all the text files at the same time

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回答（2 个）

Adam Danz
Adam Danz 2021-4-21
Use readtable or readmatrix. Both functions allow you to specify the starting line of the data.
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Adam Danz
Adam Danz 2021-4-22
Those functions are designed to work with text files and other types of files.
Read the documentation, that's why I provided links. There's a bit of a learning curve to using these functions since they have many different options but that's all explained in the documentation along with examples. Walter Roberson's answer shows you how to do this and each of those steps are explained in the links I provided above.

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Walter Roberson
Walter Roberson 2021-4-22
Ran in:
filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/592115/D11.csv';
opt = detectImportOptions(filename, 'readvariablenames', false, 'headerlines', 9, 'extracolumnsrule', 'ignore');
t = readtable(filename, opt );
t.Properties.VariableNames = {'X-AXIS', 'Y-AXIS'};
summary(t)
Variables: X-AXIS: 2000×1 double Values: Min 0 Median 499.75 Max 999.5 Y-AXIS: 2000×1 double Values: Min -77 Median -0.5 Max 104

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