Hello,

I am working with PDL's for a project and have a question involving ranges of consecutive values, and generating a piddle based on the indexes there.

I have a PDL with 3 rows which correlate with each other. The first row is my values, the second is the time at which those values took place, and the third is a mask of 0's and 1's. For the purposes of what I'm doing, we can ignore the GMT row.

Here's a visual of what I'm working with: 
$value = [1, 20, 60, 3, 900, 34, 93, 5, 12, 24, 16, 200]
$mask = [ 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1 ]

[download]
As you can see, each pdl has 12 elements. What I need to do is take and create a new PDL of the elements in $value that have consecutive 0's in $mask. I also need to preserve their indexes within $values. As an example using the above, the output I desire is a piddle like this: 
$a1 = 
[
  [60,30,900]  #from $values
  [2,3,4]      #their original indexes
]
and 
$a2 = 
[
  [5,12,24]
  [7,8,9]
]

[download]
(Where the above is a pdl with 2 pdls inside)

These would be generated from the consecutive 0's which occur in the mask.

I hope that my wording is clear and illustrates my point properly. Any and all help on this would be appreciated, as there may be some PDL function that I am unaware of that would aid me here.

Thanks

In reply to Working with PDL, need index range of consecutive values by Anonymous Monk

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