fgrayplot
2D plot of a surface defined by a function using colors
Syntax
fgrayplot(x,y,f,[strf,rect,nax]) fgrayplot(x,y,f,<opt_args>)
Arguments
- x,y
real row vectors.
- f
external of type
y=f(x,y)
.- <opt_args>
This represents a sequence of statements
key1=value1, key2=value2
,... wherekey1
,key2,...
can be one of the following: rect, nax, strf or axesflag and frameflag (seeplot2d
).- strf,rect,nax
see
plot2d
.
Description
fgrayplot
makes a 2D plot of the surface given by z=f(x,y)
on a
grid defined by x
and y
.
Each rectangle on the grid is filled with a gray or color level depending
on the average value of z
on the corners of the rectangle.
Enter the command fgrayplot()
to see a demo.
Examples
t=-1:0.1:1; deff("[z]=my_surface(x,y)","z=x**2+y**2") fgrayplot(t,t,my_surface,rect=[-2,-2,2,2])
See also
- grayplot — 2D plot of a surface using colors
- plot2d — 2D plot
- Sgrayplot — smooth 2D plot of a surface using colors
- Sfgrayplot — сглаженный двумерный график поверхности, определённой через функцию, с использованием цветов
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