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champ Scilab Group Scilab Function champ
NAME
champ - 2D vector field plot
CALLING SEQUENCE
champ(x,y,fx,fy,[arfact,rect,strf])
champ(x,y,fx,fy,<opt_args>)
PARAMETERS
x,y : two vectors which define the grid.
fx : a matrix which describes the x component of the vector field.
fx(i,j) is the x component of the vector field at point
(x(i),y(j)).
fy : a matrix which describes the y component of the vector field.
fy(i,j) is the y component of the vector field at point
(x(i),y(j)).
<opt_args>
: This represents a sequence of statements key1=value1, key2=value2,...
where key1, key2,... can be one of the following: arfact, rect,
strf (see below).
arfact : an optional argument of type real which gives a scale factor
for the display of the arrow heads on the plot (default value is
1.0).
rect : a vector rect=[xmin,ymin,xmax,ymax] which gives the boundaries
of the graphics frame to use.
strf : a string of length 3 "xyz" which has the same meaning as the
strf parameter of plot2d. The first character x has no effect
with champ.
DESCRIPTION
champ draws a 2D vector field. The length of the arrows is proportional
to the intensity of the field. If you want colored arrows with the color
of the arrows depending on the intensity of the field, use champ1.
Enter the command champ() to see a demo.
EXAMPLE
// using rect as plot boundaries
champ(-5:5,-5:5,rand(11,11),rand(11,11),1,[-10,-10,10,10],"011")
// using (x,y) to get boundaries
xbasc()
champ(-5:5,-5:5,rand(11,11),rand(11,11),2,[-10,-10,10,10],"021")
SEE ALSO
champ1, fchamp, plot2d
AUTHOR
J.Ph.C.
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