champ1 - 2D vector field plot with colored arrows

Calling Sequence

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

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)) .
• 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.

Examples

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

See Also

champ ,   fchamp ,   plot2d ,  

Author

J.Ph.C.