draw.gradient {RGeostats}  R Documentation 
Internal function for representing the gradient components
draw.gradient(x, y, gx, gy, col="black", gsize = 1., opt.grad=1, ...)
x 
Array giving the coordinates of the samples along X 
y 
Array giving the coordinates of the samples along Y 
gx 
Array giving the gradient components of the samples along X 
gy 
Array giving the gradient components of the samples along Y 
col 
Color assigned to the Gradient representation 
gsize 
Scale factor to convert a gradient unit into a field unit. 
opt.grad 
Type of representation:

... 
When all dimensions of the gradient are zero, the sample is represented using the characteristics provided by the user, but with a pattern representation fixed to pch=10.