How to select a value from a footer of a text file

Question

Ebtesam Farid 2020-12-8

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https://ww2.mathworks.cn/matlabcentral/answers/685818-how-to-select-a-value-from-a-footer-of-a-text-file

评论： Ebtesam Farid 2020-12-8

cor_2017_1_1_00.txt

Hello

please I have a text fie (of Radiosonde data) -- attached , it contains a header then a number of coulmns of data then some information about the measurements at the end of the file

I want to select a line at the end of the file starting with the (Precipitable water [mm]) then select the value attached to the line.

I tried to use textscan, but useless, I had error message when I specified all the line of data in the Header part of the command.

any advice/help please.

Thanks

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Answer 1

Kojiro Saito 2020-12-8

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https://ww2.mathworks.cn/matlabcentral/answers/685818-how-to-select-a-value-from-a-footer-of-a-text-file#answer_568728

在 MATLAB Online 中打开

You can extract the data by extractBetween. Here is a snippet.

str = fileread('cor_2017_1_1_00.txt');
extractedStr = extractBetween(str, 'Precipitable water [mm] for entire sounding: ', '</PRE>');
data = str2double(extractedStr{:});

You will get the value 1.62 in data variable.