Suppose I have the following simplified distribution:

time | value
1    | 2
2    | 4
3    | 8
4    | 16

1    | 1
2    | 3
3    | 9
4    | 27

1    | 40
2    | 20
3    | 10
4    | 5

1    | 12
2    | 1
3    | 99
4    | 23423

These are all part of the same dataset (so one x can have multiple values here, eg. time = 1 corresponds with value = 2,1,40,12). I separated them because the first 3 have an obvious pattern within their slope (2, 3 and 0.5) and the last does not have a pattern in its slope.

Now, how do I use SPSS to find the elements of a distribution that together form a pattern (any kind of pattern) in their slope? And how can I make it also include elements that almost follow this pattern, but have slight variations (a variation that I can set)?

Any feedback is appreciated. Thanks.