matlab - Performing a function on each matrix value -

matlab - Performing a function on each matrix value -

i experimenting matlab functions. trying perform function on each value found in matrix such next simple example:

k = [1:100]; p = [45 60 98 100; 46 65 98 20; 47 65 96 50]; p(find(p)) = getsum(k, find(p), find(p) + 1); function x = getsum(k, f, g, h) x = sum(k(f:g)); end

why corresponding output matrix values 3, in other words why indices depending on first calculated sum?

the output following:

p = 3 3 3 3 3 3 3 3 3 3 3 3

f:g returns value between f(1,1) , g(1,1), 1:2.

find(p) returns indices of non 0 values. since values non-zero, indices.

so if break downwards statement p(find(p)) = getsum(k, find(p), fin(p) + 1)

we

find(p) = 1:12

we f = 1:12 , g = 2:13 lead k = 1:2 (as explained above)

finally sum(1:2) = 3

and value apply on p(1:12), same p(:,:) (all matrix)

matlab matrix