champ1

2D vector field plot with colored arrows

Calling Sequence

champ1(x,y,fx,fy,[arfact,rect,strf])

Arguments

: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)).
: :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.
: :frameflag controls the computation of the actual coordinate ranges
from the minimal requested values. The associated value should be an integer ranging from 0 to 8.
: :axesflag specifies how the axes are drawn. The associated value
should be an integer ranging from 0 to 5.
: :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 champ1.

:

Description

champ1 draws a 2D vector field with colored arrows. The color of the arrows depends on the intensity of the field.

If you want arrows proportional to the intensity of the field, use champ.

Enter the command champ1() to see a demo.

Sample

Examples

champ1(-5:5,-5:5,`rand`_(11,11),`rand`_(11,11),rect=[-10,-10,10,10],arfact=2)

See Also

  • champ 2D vector field plot
  • fchamp direction field of a 2D first order ODE
  • plot2d 2D plot

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