Hi,
I am trying to construct a matrix (2d array) via the array comprehension
and hcat like this
y=[1 for i=1:3, j=1:3]
yy=hcat(y[:,1:2],[y[:,j] for j=2:3])
which fails with the following message
ERROR: mismatch in dimension 1
in cat_t at abstractarray.jl:680
in hcat at abstractarray.jl:719
in anonymous at no file
I understand, that this message is caused by the difference in types
julia> typeof(y[:,1:2])
Array{Int64,2}
julia> typeof([y[:,j] for j=2:3])
Array{Any,1}
How can I inform Julia of that fact that the result of array comprehension
is a 2d array? I tried to add some assertion to the list comprehension like
this
hcat(y[:,1:2],Array{Int64,1}[y[:,j] for j=2:3])
but it still doesn't work.
Alternatively, is there any other way to prepend/append/insert a column/row
to the matrix y?
