plotsurface.md

Plotting 3D Surfaces

Surface plotting creates a 3D surface plot of a given matrix z. Entries of z are used as height values. It is also possible to specify x and y locations corresponding to each point in z . If a terminal with interactive capabilities is being used by Gnuplot backend (like x11 or wxt or qt), then rotating, zooming is also possible.

gnuplot.splot(z)

Plot surface z in 3D.

x = torch.linspace(-1,1)
xx = torch.Tensor(x:size(1),x:size(1)):zero():addr(1,x,x)
xx = xx*math.pi*6
gnuplot.splot(torch.sin(xx))

It is also possible to specify the x and y locations of each point in z by gnuplot.splot(x,y,z). In this x and y has to be the same shape as z.

One can also display multiple surfaces at a time.

x = torch.linspace(-1,1)
xx = torch.Tensor(x:size(1),x:size(1)):zero():addr(1,x,x)
xx = xx*math.pi*2
gnuplot.splot({torch.sin(xx)},{torch.sin(xx)+2})