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  1. gingerfish

    permutation of a string/word - good solutions?

    Hi, I have a question of how to tackle following task: A string/word, e.g. ‘ABC’, needs to be displayed with all its permutations. So from ‘ABC’ it would get me ‘ABC’, ‘ACB’, ‘BAC’, BCA’, ‘CAB’, CBA’. What is the best way of doing that? I was thinking of an array holding four variables, one...
  2. gingerfish

    calculate sum in column by date

    Hi all, I have a small problem which is holding me back and I cannot figure it out. In a dataset I need to calculate the sum of variable "value" and put the result in a new variable "result". The problem is, that the calculation needs to be done by id and date. Every id can have multiple...
  3. gingerfish

    fill missing variables by cycle

    Hi all, I am on this for some time now and don't know how to solve it. It is actually only a small part of a much bigger task, but I am stuck and cannot go further. I have quite a large dataset (ds) with around 40 variables. To every ID there are multiple cycles. In every cycle there are...

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