How to plot datetime in garfh?

hello,

I have a grafh that looks like this.

Insted of the numbers in the X-axis I have a list of dates in the format ot datetime (DD/MM/YYYY)

this list is taken from a table.

I want to name the X-axis by the Dates (for exapmle 1=(datelist(1)) and so on...

how can I do this?

I am Using the contourf function to plot.

Thank you

[darova]

Did you tried this?

set(gca,'YTickLabel',[1 2 3])

Answer 1

[Payas Bahade]

Hi Gili,

Function ‘xticklabels’ can be used to change the x-axis labels. For that labels needs to be specified as a string array eg. {‘dd/mm/yyyy’,‘dd/mm/yyyy’}. If your list of dates is not in string array format, you can use function ‘char’ to convert your list into string array.

Following sample code illustrates use of ‘xticklabels’:

A={'22/01/2019','23/01/2019','24/01/2019','25/01/2019','26/01/2019'};% string array of dates 
x=[1 2 3 4 5];% x-axis data
y=[4 7 11 8 16];% y-axis data
plot(x,y); % plotting x&y
xticks([1 2 3 4 5]); % specifying x-axis data whose labels needs to be displayed
xticklabels(A);% changing x-axis labels to dates stored in variable ‘A’

For more details please refer to the following documentation of ‘xticklabels’: https://www.mathworks.com/help/matlab/ref/xticklabels.html?s_tid=doc_ta#bvaeark-1

HTH!

Answer 2

[Peter Perkins]

Gili, you say datetime and table, so I'm going to assume you are using those datatypes. contour does not currently support datetimes, but it should be straight-forward to use an integer vector to define that axis of the mesh, and then use something like Payas' suggestion, using

timestamps = string(myTable.MyTimes)

as the text tick labels.