Converting time data to plot
14 views (last 30 days)
Show older comments
I imported an excel file (xlsread) and the time data turned into decimal form. I wrote the following code get a what I think is called a character array of just times.
um_time = num(:,1);
theDate = char(datetime(num_time,'ConvertFrom','excel')); % or 'excel1904'
theTimes = theDate(:,end-7:end);
The output for theTimes variable looks like this
val =
19:17:10
19:17:10
19:17:10
19:17:10
....
The problem that I have is that I can't use the variable theTimes in a plot function.
How can I turn theTimes values into a column vector of values that I can use to plot?
0 Comments
Answers (1)
Adam Danz
on 10 Sep 2019
Edited: Adam Danz
on 16 Sep 2019
After you convert to datetime, keep it in datetime format. There's no need to convert it to char.
From r2016b onward, you can use datetime objects in plot().
datetime(num_time,'ConvertFrom','excel')
Here's several of examples
[addendum]
If you're reading the dates in from excel you can read them in as datetime.
m = readmatrix('Dates.xlsx','OutputType','datetime');
2 Comments
Adam Danz
on 12 Sep 2019
Edited: Adam Danz
on 13 Sep 2019
I just updated my answer to add another approach similar to yours.
If you're going to use readtable(), you could use the DateTimeType name-value input instead of doing the conversion in your comment above.
See Also
Categories
Find more on Spreadsheets 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!