Converting txt file into title and array?

Question

Darren Miller 2020-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/525011-converting-txt-file-into-title-and-array

评论： Darren Miller 2020-5-13

I am trying to load a txt file that looks like this:

Time (s)
0
1.5
1.6
2
2.5
3.5
4

and I want to save the first line as a string to be used for the xlabel on a plot, and the n lines of numbers afterwards I would like to save as an array.

I tried to use something like this and it did not work:

 xL = fscanf(fid,'%s'); 
 fgetl(fid); %first line of txt file is the data label I am going to use for the plot xlabel
 for n = 1:dataLength % dataLength = 7 here
     data(n) = fscanf(fid,'%f'); 
     fgetl(fid);
 end 

The problem was the xL variable was then defined as 'Time (s)01.51.622.53.54' . It basically did not just grab one line for some reason.

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Answer 1

per isakson 2020-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/525011-converting-txt-file-into-title-and-array#answer_432112

编辑：per isakson 2020-5-12

在 MATLAB Online 中打开

Try this

%%
fid = fopen( 'cssm.txt', 'rt' );
xL = fgetl( fid );                  % read the first line
data = fscanf( fid, '%f' );         % read numerical data until end of file
[~] = fclose( fid );
%% 
xL
data

where cssm.txt contains your data sample

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Darren Miller 2020-5-13

Thank you! This works perfectly.

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Answer 2

Ameer Hamza 2020-5-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/525011-converting-txt-file-into-title-and-array#answer_432115

在 MATLAB Online 中打开

On recent MATLAB releases, you can also try readtable

t = readtable('test.txt', 'PreserveVariableNames', true);

Then access data and label using this syntax

data = t{:,1}
label = t.Properties.VariableNames{1}

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Darren Miller 2020-5-13

This almost works perfectly, but unfortunately my txt file header has parentheses in it ( 'Time (s)') which did not get preserved for some reason. Thanks anyway though, I appreciate the help!

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