xchange
transform real to pixel coordinates
Calling Sequence
[x1, y1, rect] = xchange(x, y, dir)
Arguments
x, y
two matrices of size (n1, n2)
(coordinates of a set of points).
dir
a string, parameter used to specify the conversion type
(See "Description" for details).
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].
Examples