Intertwining 3 arrays in matlab / octave to get correct pattern

2
votes

I know I can intertwine 2 arrays by

C = [A(:),B(:)].';   %'
D = C(:)

But how can I intertwine 3 arrays with a (pendulum type of pattern going back and forth) See image below with arrows showing the intertwining path pattern I'm trying to get (each column is an array). Also the number pattern I'm trying to get is also next to it, in one large column. Please note the numerical values are just examples to make it easier to read. the numerical values could be decimals also

number pattern

I tried the code below but the pattern is incorrect.

A=[1,2,3,4,5]
B=[10,20,30,40,50,60,70,80,90]
C=[100,200,300,400,500]

D = [A(:),B(:),C(:)].';   %'
E = D(:)

I get an error in the D array due to the fact that the B array is a larger size than A and C but the number pattern is also not following the pattern I'm trying to get. 

                 1
                10
               100
                 2
                20
               200
                 3
                30
               300
                 4
                40
               400
                 5
                50
               500
error: horizontal dimensions mismatch (5x1 vs 9x1)

The pattern from the 3 arrays I'm trying to get is below.

Please note the numerical values are just examples to make it easier to read. the numerical values could be decimals also

1
10
100
20
2
30
200
40
3
50
300
60
4
70
400
80
5
90
500

PS: I'm using Octave 3.8.1 which is like matlab

1
arraysmatlaboctave

1 Answers

1
votes

Have you tried the following?

D = zeros(4 * size(A, 2) - 1, 1); % initialization
D(1 : 4 : end) = A;
D(2 : 2 : end) = B;
D(3 : 4 : end) = C;