How to apply a function only to the second column of a matrix
The only way I know of is this. Is there an easier way to apply the sin function to only the second column of a matrix?
julia> m = [1. 2. 3.; 4. 5. 6.; 7. 8. 9. ]
3×3 Array{Float64,2}:
1.0 2.0 3.0
4.0 5.0 6.0
7.0 8.0 9.0
julia> for k = 1:size(m)[1]
m[k,2] = sin(m[k,2])
end
julia> m
3×3 Array{Float64,2}:
1.0 0.909297 3.0
4.0 -0.958924 6.0
7.0 0.989358 9.0
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