# Change array shapes

#### JamesCodingForum

Hi Guys,

I think an example will make this problem easier to understand.

A1,A2,A3 are 2Dimensional arrays
Inputs:
A1=
[R1,R2,R3]
[R4, R5, R6]
[R7, R8, R9]

A2=
[G1,G2,G3]
[G4, G5, G6]
[G7, G8, G9]

A3=
[B1,B2,B3]
[B4, B5, B6]
[B7, B8, B9]

I want to produce a single array that looks like the following:
What I want to create is the following matrix:
A4 =
[R1,G1,B1]
[R2,G2,B2]
[R3,G3,B3]
[R4,G4,B4]
[R5,G5,B5]
[R6,G6,B6]
[R7,G7,B7]
[R8,G8,B8]
[R9,G9,B9]

A1,A2,A3 have a lot more rows and columns, but i think the above gives an example of what I am looking for.

Any ideas?

#### phillip1882

the problem is even if you know the desired array shape, where the values go have several options.
for the above shape and result, this would be my code
Python:
``````destinarray = []

for i in range(0,3):
for j in range(0,3):
destinarray += [A1[i][j],A2[i][j],A3[i][j]]
print(destinarray)``````

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