plotf_surf (MathScript RT Module Function)

LabVIEW 2012 MathScript RT模块帮助

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Owning Class: plots

Requires: MathScript RT Module

Syntax

plotf_surf(f)

plotf_surf(f, r)

plotf_surf(f, a)

plotf_surf(f, r, a)

plotf_surf(f, 'circ')

plotf_surf(f, r, 'circ')

plotf_surf(f, a, 'circ')

plotf_surf(f, r, a, 'circ')

Legacy Name: ezsurf

Description

Plots a function of two variables as a 3D surface. You can write the function in explicit or parameterized notation. plotf_surf plots f over the specified region.

Examples

Inputs

Name Description
f Specifies the function or functions you want to plot. f is a string or three strings separated by commas. Each string represents a valid expression. If f is a single expression of two variables x and y, plotf_surf plots z = f(x, y). If f is a set of three strings that share the same two variables, LabVIEW displays a parameterized surface.
r Specifies the region of the plot. r is a four-element real vector or a two-element real vector. If r is a four-element vector, the r values represent [xmin, xmax, ymin, ymax]. If r is a two-element vector, the r values represent the square [xmin, xmax, xmin, xmax]. The default is [-2*pi, 2*pi, -2*pi, 2*pi].
a Specifies the grid size. a is a positive integer. LabVIEW uses a grid of a-by-a points. The default is 60.
'circ' Changes the specified region of the plot from a rectangle to a disc. The center of the disc coincides with the center of the underlying region specified by r.

Details

The following table lists the support characteristics of this function.

 Supported in the LabVIEW Run-Time Engine No (always ignored) Supported on RT targets No

Examples

f = 'sin(x)*cos(y)';
plotf_surf(f)

plotf_surf('sin(sin(t*t))*cos(s)', 'sin(sin(t*t))*sin(s)', 'cos(s)')

f = 'a^4+b^2-1';
r = [-2, 2, -3, 1];
plotf_surf(f, r)

plotf_surf('s', 't', 's+t', 20, 'circ')

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