MATLAB: Creating a mesh plot with data in a timetable

meshplotting

Hi there,

Assume that I create a time table based on a matrix as follows.

X = rand(5,3);
Time = seconds(1:5);
TT = array2timetable(X,'RowTimes',Time)

Now I want to get a meshz plot with x axis to be the Time vector and and showing dateticks as xtick labels.

I tried

meshz(TT{:,:})

but this will show xticks NOT as dateticks as in Time ?

Can anyone please help me with this ?

Thank you.

Best Answer

OK, the above conversation branched another route --

time=datenum(Time);             % convert to datenum since they're doubles underneath...
meshz(time,Y,Z)
xt=xticks; xticks(xt(1:3:end))  % not going to be room for very many tick labels so cut 'em down...
datetick('x','mmmyy HHAM','keepticks','keeplimits')

results in

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For some reason TMW hasn't yet gotten around to making the rest of the plotting routines datetime aware so you've got to revert to the venerable datenum(*):

Try

dt=datenum(2017,1,1:4).';  % a short time series vector
y=randn(4,30);             % some y-data to go along with it
hBar=bar(dt,y);            % bar graph vs the time
datetick('x','keeplimits','keepticks')  % set the axis to display time strings

See

doc datetick  % and friends

for the details on formatting, etc., ...

ADDENDUM

() *NB: Even with plot using a datetime- object, internal to axes the date values on the axis are datenum doubles, not datetime objects. TMW pretty-much had to do this for compatibility purposes. Hence, while there's a "pretty" user interface and the new class/object has some useful properties, the old-style datenum isn't going to go away any time soon.

MATLAB: Changing X-Axis to Hours

hi,

You can use XTickLabel, for example

set(gca,'XTickLabel',{'1:00AM','2:00AM','3:00AM','4:00AM','5:00AM','6:00AM'})

Best Answer

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