Scilab Reference Manual |
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Matplot1 — 2D plot of a matrix using colors
Matplot1(a,rect)
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.
//--- first example // fix current scale xsetech(frect=[0,0,10,10]) xrect(0,10,10,10) a=5*ones(11,11); a(2:10,2:10)=4; a(5:7,5:7)=2; // first matrix in rectangle [1,1,3,3] Matplot1(a,[1,1,3,3]) a=ones(10,10); a= 3*tril(a)+ 2*a; // second matrix in rectangle [5,6,7,8] Matplot1(a,[5,6,7,8]) xset('default') xbasc() //--- second example xsetech(frect=[0,0,10,10]) xrect(0,10,10,10) n=100; xset('pixmap',1) driver('X11'); for k=-n:n, a=ones(n,n); a= 3*tril(a,k)+ 2*a; a= a + a'; k1= 3*(k+100)/200; Matplot1(a,[k1,2,k1+7,9]) xset('wshow') xset('wwpc') end xset('pixmap',0) xset('default') xbasc()
J.Ph.C.
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