Hi! In the Data-step we can use  CALL SORTN( of   ARRN(*));  to sort all elements in the array ARRN in increasing order. It works fine for both ordinary arrays and _temporary_ arrays. If the array is not _temporary_ then we can specify the variable names,  like CALL SORTN( of ARRN3-ARRN10); to sort only elements 3 to 10. (Note that it is not possible to specify the array element names.  CALL SORTN( of ARRN(3) -ARRN(10));   gives ERROR!)   My question: Is it possible to sort only PART of the _temporary_ array  in some way. This can be useful. I have tried a number of different ways, but it did not work.   _Temporary_ arrays are VERY much faster than ordinary arrays. (A way of speeding up ordinary arrays is NOT to include them in the output data set. i.e. they are not included in the file buffer). Many thanks in advance!   /Br Anders ... View more

Hi! I need to sort rather large arrays in the Data step. All Numeric values, unique. No. of values up to 50 thousand, perhaps more. Is Quicksort the best? Where can I find the best SAS code for Quicksort? What alternatives are there for Quicksort?   I use SAS ODA (OnDemand for Academics). I want to write code that can be published and is very general. Many thanks in advance! (I have been googling for a white. Not easy to find the best answer) /Br AndersS ... View more

Hi! I want to measure cpu time in SAS ODA. The time seems to vary with +/- 5% (sometimes even more). So I can run, the same program say 10 times. Then  add the values (user cpu time and system cpu time) from the log, divide by 10. Is there any better way?   Many thansk in advance! /Br AndersS   ... View more