Is there a function to flatten a multidimensional array?

[Johan Sigfrids]

Does julia have a function to flatten a multidimensional array into a single dimensional one? I.e. something like

>flatten([1 4; 2 5; 3 6])
6-element Array{Int64,1}:

 1
 2
 3
 4
 5
 6

[Blake Johnson]

Try vec(a). Or simply a[:]

[Johan Sigfrids]

Thanks, just what I was looking for.

[Jacob Quinn]

Also note the more general reshape function: http://docs.julialang.org/en/latest/stdlib/base/#Base.reshape

Example:

In  [6]: t = [1 4; 2 5; 3 6]

Out [6]: 3x2 Array{Int64,2}:

 1  4

 2  5

 3  6

In  [7]: reshape(t,1,6)

Out [7]: 1x6 Array{Int64,2}:

 1  2  3  4  5  6

In  [8]: reshape(t,6,1)

Out [8]: 6x1 Array{Int64,2}:

 1

 2

 3

 4

 5

 6

[Tim Holy]

flat = A[:]

[Anthony Voutas]

None of the above are working for me.

s = "string"

arr = [s,s,s,s]

transform = (x -> [x, x*"d"])

chunky = map(transform, arr)

# chunky is now 4 by 2

vec(chunky) # no change

chunky[:] # no change

reshape(chunky, 1, 8) # fails with dimension mismatch

I'm guessing something has changed with Julia since the last comment here but I can't seem to find an updated answer anywhere.

[Tim Holy]

It's not a 4-by-2 array, it's a 4-vector of 2-vectors. If you want to create a
4-by-2 array, use

chunky = [a*b for a in arr, b in ("", "d")]

--Tim