Hello,
I am having problems vectorizing the following (i/o using a for/next/while
loop):
I have 2 sequences such as:
x, y
1, 30
2, -40
0, 50
0, 25
1, -5
2, -10
1, 5
0, 40
etc etc
The first sequence (x) takes integer numbers only: 0, 1, 2
The sequence y can be anything...
I want to be able to retrieve (in a list if possible) the 3 last values of
the y sequence before a value of 1 is encountered on the x sequence, i.e:
On line 5 in the above dataset, x is 1 so I need to capture values: 25, 50
and -40 of the y sequence.
So the outcome (if a list) should look something like:
[1],[25,50,-40]
[2],[-10,-5,25] # as member #7 of x sequence is 1...
etc. etc.
Can I do the above avoiding for/next or while loops?
I am not sure I can explain it better. Any help/pointer extremely welcome.
Best regards,
Costas
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