How to import to Matlab many text files as table type

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José Fonseca
José Fonseca 2020-5-30
评论： Walter Roberson 2020-6-1
I have about 30 .txt files and I need to plot the data of each files using Matlab. I don't know how to import each of them as a table type (using the readtable function, maybe), solving this problem would help me for creating a loop that allows me to plot each imported file (I also don't have idea how to create this loop, in order to select each imported table).
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Sindar
Sindar 2020-5-31
Beyond the file extension, do they all store the data in the same way? Number and order of columns, data types, delimeters
José Fonseca
José Fonseca 2020-5-31
Sindar No, all of them are numeric values, but they can have different numer of rows and columns

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回答（1 个）

Walter Roberson
Walter Roberson 2020-6-1
projectdir = 'directory the files are in';
dinfo = dir(fullfile(projectdir, '*.txt')); %use appropriate extension
filenames = fullfile(projectdir, {dinfo.name});
nfiles = length(filenames);
tables = cell(nfiles,1);
for K = 1 : nfiles
tables{K} = readtable(filenames{K});
%you could plot tables{K} here
end
%or you could plot elements of tables here
for K = 1 : nfiles
thisfile = filenames{K};
[~, basename, ~] = fileparts(thisfile);
plot(tables{K}.Time, tables{K}.Resistance, 'Displayname', basename);
hold on
end
hold off
legend show
  2 个评论
Sindar
Sindar 2020-6-1
Since the number of columns might vary, the only thing I'd add is that this will plot all later columns against the first:
plot(tables{K}{:,1}, tables{K}{:,2:end}), 'Displayname', basename);
Walter Roberson
Walter Roberson 2020-6-1
True. Unfortunately the legend will not be all that useful in that situation.

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