How do i extract values from a name-value pair argument?

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AUWAL ABUBAKAR 2018-4-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/392062-how-do-i-extract-values-from-a-name-value-pair-argument

评论： AUWAL ABUBAKAR 2018-4-3

Can someone help me on this please. my function is this; fid=fopen('20160613.XVI'); C=textscan(fid,'%s%s','CollectOutput',true,'Delimiter',';'); data=C{1}(71:73,1); [~]=fclose(fid);

It returns the following; {'CouchShiftLat=-0.17' } {'CouchShiftLong=-0.08' } {'CouchShiftHeight=-0.09'} But i needed only the values; -0.17,-0.08 and -0.09.

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AUWAL ABUBAKAR 2018-4-2

sample.txt

I am now able to read the values i wanted using the function below:

fid=fopen('20160613.txt');

C=textscan(fid,'%s%s','CollectOutput',true,'Delimiter',';=');

celldata=C{1}(73:75,2);

data=str2double(celldata)

[~]=fclose(fid);

My next task now is to read this from multiple files(1,2...n). Attached here is a sample of my data file.

many thanks

Stephen23 2018-4-2

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files

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Answer 1

KSSV 2018-4-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/392062-how-do-i-extract-values-from-a-name-value-pair-argument#answer_313065

在 MATLAB Online 中打开

files = dir('*.txt') ;   % Get all text files of the folder 
N = length(files) ;     % Total files 
% loop for each file 
for i = 1:N 
    file = files(i).name ;
    % do what you want 
end