2D plot of a matrix using colors (original) (raw)

Scilab 5.3.3

• Scilab help
• Graphics
• 2d_plot
• LineSpec
• Matplot
• Matplot1
• Matplot_properties
• Sfgrayplot
• Sgrayplot
• champ
• champ1
• champ_properties
• comet
• contour2d
• contour2di
• contourf
• errbar
• fchamp
• fcontour2d
• fec
• fec_properties
• fgrayplot
• fplot2d
• grayplot
• grayplot_properties
• graypolarplot
• histplot
• oldplot
• paramfplot2d
• plot
• plot2d
• plot2d1
• plot2d2
• plot2d3
• plot2d4
• plot2d_old_version
• polarplot

Please note that the recommended version of Scilab is 2026.0.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Graphics > 2d_plot > Matplot1

Matplot1

2D plot of a matrix using colors

Calling Sequence

Arguments

a

real matrix of size (n1,n2).

rect

[xmin,ymin,xmax,ymax]

Description

The entries of matrix int(a) are used as colormap entries in the current colormap. rect specify a rectangle in the current scale and the matrix is drawn inside this rectangle. Each matrix entry will be rendered as a small rectangle filled with its associated color. If a matrix entry is outside the colormap, the corresponding rectangle is not displayed.

Examples

clf(); ax=gca(); ax.data_bounds=[0,0;10,10]; ax.box='on'; a=5*ones(11,11); a(2:10,2:10)=4; a(5:7,5:7)=2;

Matplot1(a,[1,1,3,3]) a=ones(10,10); a= 3*tril(a)+ 2*a;

Matplot1(a,[5,6,7,8])

n=100;

clf(); f=gcf(); f.pixmap='on'; ax=gca(); ax.data_bounds=[0,0;10,10]; ax.box='on'; show_pixmap() for k=-n:n, a=ones(n,n); a= 3*tril(a,k)+ 2a; a= a + a'; k1= 3(k+100)/200; if k>-n then delete(gce()),end Matplot1(a,[k1,2,k1+7,9]) show_pixmap() end f.pixmap='off';

See Also

• colormap — using colormaps
• plot2d — 2D plot
• Matplot — 2D plot of a matrix using colors
• grayplot — 2D plot of a surface using colors
• Matplot_properties — description of the Matplot entities properties