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Справка Scilab >> Графики > 2d_plot > grayplot

# grayplot

2D plot of a surface using colors

### Calling Sequence

grayplot(x,y,z,[strf,rect,nax])
grayplot(x,y,z,<opt_args>)

### Arguments

x,y

real row vectors of size n1 and n2.

z

real matrix of size (n1,n2). z(i,j) is the value of the surface at the point (x(i),y(j)).

<opt_args>

This represents a sequence of statements key1=value1, key2=value2 ,... where key1, key2,... can be one of the following: rect, nax, strf, logflag or axesflag and frameflag (see plot2d).

strf,rect,nax

see plot2d.

### Description

grayplot makes a 2D plot of the surface given by z 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. If z contains %nan values, the surounding rectangles are not displayed.

Enter the command grayplot() to see a demo.

### Examples

x=-10:10;
y=-10:10;
m=rand(21,21);
grayplot(x,y,m,rect=[-20,-20,20,20])
t=-%pi:0.1:%pi;
m=sin(t)'*cos(t);
clf()
grayplot(t,t,m)

### See Also

• fgrayplot — 2D plot of a surface defined by a function 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

### History

 Версия Описание 5.5.0 Option logflag introduced.
 Report an issue << fplot2d 2d_plot grayplot properties >>

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