I'm having some difficulty getting my head around an "experiment" I'm trying to run. (This is just for some idea I have related to a thought experiment I'm working on and thought that I could generate a data set based on it, but I'm stuck on how to actually make it work).
The idea is based on Duffey & Saull's "Jar of Life" experiment, which has 25 white balls, and 5 black balls which are in a jar. Each of the 30 balls is drawn in succession. At the end you have a result that would look something like:
Where W = W=white and B = black.
SO this sequence is a random sequence every time, but there will always be exactly 25 White and 5 Black (this is the part that is doing my head in).
I created a routine to randomize 0 and 1 (Where 0 represents white, and 1 represents black) This I will actually store in a text field in a table, C30 in length, so later I can just use SQL commands to pluck out the patterns that I want after I run about 1,000,000 iterations of the test.
So I can do something like:
White = 0 Black = 1 APPEND BLANK FOR X = 1 to 30 REPLACE SEQUENCE WITH ALLTRIM(SEQUENCE)+ALLTRIM(STR((INT((White - BLACK + 1) * RAND( ) + Black)) ENDFOR
I'll of course bury that into a loop that runs 1,000,000 iterations, but this is the idea.
The problem is, HOW do I get it to produce only 25 White outcomes and 5 black outcomes in an iteration???
MSc ISM, MIET, MASHRAE, CDCP, CDCS, CDCE, CTDC, CTIA, ATS
"Everything should be made as simple as possible, and no simpler."