convert 3 dimensional array into dataframe

arrays and matrices are vectors with dimensions, so recast to a matrix, then data.frame:

data.frame(matrix(result, nrow=2, byrow=TRUE))
# generalisably:
data.frame(matrix(result, nrow=dim(result)[3], byrow=TRUE))

#  X1 X2 X3 X4 X5 X6 X7 X8 X9
#1  2 13 22 98  4  8  8  1 10
#2  2  4  6  7  1 55 32 12  1

You could try mapply:

as.data.frame(mapply(function(x, y) c(x, y), result[,,1], result[,,2]))
#  V1 V2 V3 V4 V5 V6 V7 V8 V9
#1  2 13 22 98  4  8  8  1 10
#2  2  4  6  7  1 55 32 12  1