[R] how to rotate a triangle image(ZMAT) ?
Cleber N.Borges
klebyn at yahoo.com.br
Tue Jun 27 19:25:20 CEST 2006
Hello R users...
how to align this Zmat (triangle image) in X axis?
I would like that the triangle's base become in the X
axis and
the triangle's height become in the Y axis
Is there some trick for make this?
Thanks.
Cleber
######################## my test and try
f <- function(x,y){
z=1-x-y
z[ z < (-1e-15) ] <- NA
return( -100*x+0*y+100*z )
}
x = seq( 1, 0, by = -0.01 )
y = seq( 1, 0, by = -0.01 )
zmat = outer(x,y,f)
image(zmat, col=terrain.colors(10))
contour(zmat, add=T)
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