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xchange Scilab Group Scilab Function xchange
NAME
xchange - transform real to pixel coordinates
CALLING SEQUENCE
[x1,y1,rect]=xchange(x,y,dir)
PARAMETERS
x,y : two matrices of size (n1,n2) (coordinates of a set of points).
x1,y1 : two matrices of size (n1,n2) (coordinates of the set of
points).
rect : a vector of size 4.
DESCRIPTION
After having used a graphics function, xchange computes pixel coordinates
from real coordinates and conversely, according to the value of the
parameter dir: "f2i" (float to int) means real to pixel and "i2f" (int to
float) means pixel to real. x1 and y1 are the new coordinates of the set
of points defined by the old coordinates x and y. rect is the
coordinates in pixel of the rectangle in which the plot was done:
[upper-left point, width, height].
EXAMPLE
t=[0:0.1:2*%pi]';
plot2d(t,sin(t))
[x,y,rect]=xchange(1,1,"f2i")
[x,y,rect]=xchange(0,0,"i2f")
AUTHOR
J.Ph.C.
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