MATLAB: Plot3 with datetime

datedatetimeMATLABplot3plottingtime

Is it possible to use datetime class variables with any plot functions other than plot? e.g. plot3 If I try the following command:

plot3(datetime,1,1)

I get the following error:

Error using plot3
A numeric or double convertible argument is expected

Best Answer

It's not possible to use datetime with plot3. However, you can use your axis values with datetick to display the axis ticks as dates. For more details on datetick, refer the following link:

http://www.mathworks.com/help/matlab/ref/datetick.html

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t = datetime(DateStrings,'InputFormat','dd/MM/yyyy');

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Hi Lisa, To use plot3, you must have your time (position) and scale vectors as matrices because the CWT coefficients are in a matrix.

You can use meshgrid() to transform your time and scale vectors into matrices suitable for plot3()

t = 1:1024;
a = 1:30;
Wt = abs(randn(30,1024));
[T,A] = meshgrid(t,a);
plot3(T,A,Wt); xlabel('time'); 
ylabel('Scale'); zlabel('CWT magnitude');

However, I think you may find surf() better here

    surf(t,a,Wt); shading interp;
    xlabel('time'); ylabel('scale'); zlabel('CWT magnitude');

Best Answer

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