Why multiplication returns NA in R -

i have vector f2 in r:

f2        [,1]  [1,] 0.125  [2,] 0.875

and when prompt f2[1], 0.125. when prompt f2[2], 0.875

but when prompt f2[1]*f[2], na.

i wondering why case, , what correct syntax be.

i cannot reproduce problem:

m = matrix(runif(2), 2, 1) m           [,1] [1,] 0.4633784 [2,] 0.6180268 > m[1] [1] 0.4633784 > m[2] [1] 0.6180268 > m[1]*m[2] [1] 0.2863803

so you'll have bit more specific.

Brande