Hello,
I have a very long (~50,000) sequence of repeating numbers. The first
100 are:
[1] 0 0 0 0 0 0 0 0 0 0 0 429
[13] 429 429 429 429 429 429 429 858 858 858 858
858
[25] 858 1287 1287 1287 1287 1287 1716 2145 2145 2574 2574
3003
[37] 3003 3432 3432 3861 4290 4719 5148 5577 5577 6006 6006
6006
[49] 6435 6435 6435 6864 6864 7293 7293 7293 7722 7722 7722
7722
[61] 8151 8151 8151 8580 8580 8580 9009 9009 9009 9009 9438
9438
[73] 9438 9438 9867 9867 9867 10296 10296 10296 10725 10725 10725
10725
[85] 11154 11154 11154 11154 11154 11583 11583 11583 11583 12012 12012
12012
[97] 12012 12441 12441 12441
What I want is to produce a vector of lengths for each contiguous run of
numbers . i.e. for the above example, the first three items of the
vector returned would be:
11 8 6
...to represent the counts of 0, 429, and 585, respectively. I could do
this with unique() and a for loop, but this would be very inefficient.
Any advice on how to do this efficiently would be most appreciated.
thanks
Tony
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