Plot large CSV files with timestamp

4 views (last 30 days)
Ancalagon8
Ancalagon8 on 21 Nov 2018
Commented: Walter Roberson on 21 Nov 2018
I have a large csv file and try to load it into MATLAB and plot it with timestamp. My release is 2016b and i have 8gb of RAM.
My code starts like this
ds = tabularTextDatastore('2018-11-18.csv','TreatAsMissing','NA')
data = preview(ds);
whos data
data(:,1:7) % Look at first 7 variables
testdata = read(ds)
  2 Comments
Jan
Jan on 21 Nov 2018
What is your question?
Ancalagon8
Ancalagon8 on 21 Nov 2018
I need help loading and plotting my large csv file with timestamp.

Sign in to comment.

Answers (1)

Walter Roberson
Walter Roberson on 21 Nov 2018
strcat the first two columns together with a blank between . datetime the result with an InputFormat parameter , which is required for this purpose because datetime cannot figure out fractions of a second by itself .
Now that you have timestamps and values you can prepare to plot . I think your release permitted using datetime as the X axis .
  4 Comments
Ancalagon8
Ancalagon8 on 21 Nov 2018
and testdata is my file?
Walter Roberson
Walter Roberson on 21 Nov 2018
Like you posted,
testdata = read(ds);

Sign in to comment.

Categories

Find more on Graphics Object Identification in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!