Read all .csv-files in folder and plot their content

Question

By an old post (https://stackoverflow.com/a/13744310/3900582) I have been able to read all the .csv-files in my folder into a cell array. Each .csv-file has the following structure:

Where the left column is the x-value and the right column is the y-value.

In total, there are almost 200 files and they are each up to 100 000 lines long. I would like to plot the contents of the files in one figure, to allow the data to be more closely inspected.

you can use JfreeChart library for plotting purpose. this page can help you. see http://stackoverflow.com/questions/6665354/changing-the-shapes-of-points-in-scatter-plot — saeid rastak, Dec 12 '16 at 05:50
However, this is not an answer to my question, this is java. — GLaDER, Dec 12 '16 at 05:55
Matlab, as stated by the tag and the old post referred to above. Thank you anyway, but I managed to solve it omo. — GLaDER, Dec 12 '16 at 06:00
OK. if you want to scatter you points in matlab, this page can help you: https://www.mathworks.com/help/matlab/ref/scatter.html — saeid rastak, Dec 12 '16 at 06:04

score 0 · Accepted Answer · answered Dec 12 '16 at 06:02

I was able to use the following code to solve my problem:

dd = dir('*.csv');

fileNames = {dd.name}; 

data = cell(numel(fileNames),2);
data(:,1) = regexprep(fileNames, '.csv','');

for i = 1:numel(fileNames)    
   data{i,2} = dlmread(fileNames{i});
end

fig=figure();
hold on;

for j = 1:numel(fileNames)

    XY = data{j,2};
    X = XY(:,1);
    Y = XY(:,2);

    plot(X,Y);

end

Read all .csv-files in folder and plot their content

1 Answers1