Hello colleagues,

I have a little question. I want to build a matrix in Julia 7.0, where is a concatenation of several vectors of same length. I use the code:

A = rand(10,10)

B = %a empty matrix

for i=1:2:10

B = [B;A[i,:]] %B is the matrix whose line i is from A, where i is odd

end

In Julia 0.6.4, the above code is ok. But in version 7.0 not run. The error is:

ArgumentError: number of columns of each array must match (got (1, 10))

_typed_vcat(::Type{Any},

Anyone could help me?