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matlabdatetimeplotmatlab-figure
user2156115
user2156115

Reputation: 1257

How to plot weird timestamp in Matlab

I have a rather simple task. I just simply need to do something like that

plot(stampy{1:5},data{2}(1:5))

However, with stampy{1:5} I have five separate ans and data{2}(1:5) seems to be alright for plotting. i have tried to loop smth like that

cc=zeros(1,10);
for i=1:10
     cc(i) = stampy{i}
end

But it did not work. I don't know, it seems to be a very simple task. Can anybody suggest the solution ? I have data in this form:

>> stampy{1:5}
ans =
21-Sep-2016 05:52:00
ans =
21-Sep-2016 05:53:00  
ans =
21-Sep-2016 05:54:00
ans =
21-Sep-2016 05:55:00
ans =
21-Sep-2016 05:56:00

and 

>> data{2}(1:5)

ans =

  -32.3750
  -25.0000
  -25.0000
  -25.0000
  -25.0000

Upvotes: 4

Views: 357

Answers (3)

EBH
EBH

Reputation: 10450

If you want to plot a time axis, you can use a datetime type of variable:

% the following line converts stampy to a time vector:
sy = datetime(stampy,'InputFormat','dd-MMM-yyyy HH:mm:ss');
plot(sy,data{2}(1:5))

Upvotes: 2

Suever
Suever

Reputation: 65470

You can use datenum to convert each of your dates to a date number and use this as the x axis. You can then use datetick to specify the format to use for your tick marks. This has the benefits that it works on most any version of MATLAB and it handles non-uniformly spaced dates.

plot(datenum(stampy), data{2}(1:5))
datetick('x', 'HH:MM:SS')

enter image description here

Upvotes: 3

Sardar Usama
Sardar Usama

Reputation: 19689

Just plot your data and rename the Xticks as follows:

plot(data{2}(1:5));
set(gca,'XTick',1:5,'XTickLabel',{stampy{1:5}});

Output:

output

Upvotes: 2

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