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contrast
2000 Apr 28
3
L(x,y,t)?
I have been using the following method to create L(x,t)
x<-seq(1,66)
time<-seq(1,19)
v0<-.01
f0<-function(x,time) .45*cos(2*pi*3*x/66+v0*time)
L0<-outer(x,time,f0)
If I do image(L0) I get an x,t plot of a drifting cosine wave grating.
The grating is actually a pattern of fuzzy bars; I have been ignoring the
y dimension (because the grating is vertical: y has no effect on the