CODEWITHSUNDEEP
matlab
Shawn Andrews
Shawn Andrews

Reputation: 1

Trying to plot all of the timestamps from a folder onto graph

I have a folder with 20,000+ data entries, and am trying to graph the time in-between each entry, to see where our process slows down. I've been trying to use the Dir() function on Matlab, by combining a couple of different codes I've found, but I feel like I'm way out of my depth, and not even able to get the basic structure right.

for i=1:25910
  
   n = num2str(i);
   d = dir('P' n '_Bump.datx');
   moddate = d.date;
   Plot(n,moddate)
    
end

I'm more familiar with python if there's a similar function that could pull the timestamp off of a file in that.

Data is formatted like:

P1_Bump.datx

P2_Bump.datx

...

P25910_Bump.datx

Upvotes: 0

Views: 47

Answers (1)

Wolfie
Wolfie

Reputation: 30046

You can pull all of your files into a table (which is slightly easier to deal with than a struct in this case) like this:

files = dir( '*_Bump.datx' );
files = struct2table( files, 'AsArray', true );

Then get the dates from the datenum field of the table (since the date field is a char and not a MATLAB date)

dates = datetime( files.datenum, 'convertfrom', 'datenum' )

To calculate the time between files you can use diff

timesBetween = diff(dates);

Then plot

figure;
plot( timesBetween );

Note that timesBetween will be one element shorter than the number of files, since it's the differences in between files.

Upvotes: 1

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