This code will produce four different samples of plaid material. How would
you make them more efficiently without changing the intent of P ?
load 'viewmat'
RGB216=: (6 6 6#:i.216){(i.6)*255%5
GRB216=:1 0 2{"1 RGB216
P=: +/~Q=:(T=:12$30 20 70 40)#S=:N,N,N=:4?216
GRB216 viewmat P;'gray GRB216'
P=: +/~Q=:(T=:12$30 20 70 40)#S=:N,N,N=:4?216
GRB216 viewmat P;'gray GRB216'
P=: +/~Q=:(T=:12$30 20 70 40)#S=:N,N,N=:4?216
GRB216 viewmat P;'gray GRB216'
P=: +/~Q=:(T=:12$30 20 70 40)#S=:N,N,N=:4?216
GRB216 viewmat P;'gray GRB216'
Linda
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