python - How do I add one more loop to this? -


part of code is:

list1 = zeros((x,y))  j in range(1,y):     in range(1, x-1):         list1[i,j] = list1[i,j-1] + equation

this works fine. however, when want next stage, need modify "equation" part in second loop. equation (a*b+c)*d, wish make 1 of parameters(a,b,c,d) varying every increase in j.

that is, when j 1, a = something. when j increases 2, changes according. function of j. example: a = a*cos(w*j).

my problem is, how loop relation code a updated every time?

just add expression in outer loop, calculating a based on changing value of j:

for j in range(1, y):     = * cos(w * j)     in range(1, x-1):         list1[i, j] = list1[i, j - 1] + (a * b + c) * d

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