Hello all Suppose I have many variables (both numerical and character) and I want to reduce them. I know Proc VARCLUS can work for correlated numerical variables, howvere, is there any method that can work for categorical/character variables? ... View more

Hello, All Suppose I have following dataset (the response is continous, group is ordinal (4 levels)). data test; input response group; cards; 75 1 45 1 89 1 47 1 59 2 100 2 76 2 123 2 65 3 43 3 45 3 150 3 56 4 67 4 89 4 100 4 ; The response relates to the the probability (risk) of getting a disease; the bigger the response, the higher the risk. The goal is to get an estimate of risk ratio; how should I do that? ... View more

Hello, All I understand that, in data step, SAS process data record by record; so memory should not be a problem when dealing with large data set. Now suppose I have a dataset "test" which is 100G, and available memory is 16G; if I want to do some statistics about the data, such as a logistic regression: PROC LOGISTIC DATA=test; How does SAS deal with such Procs? still record by record? will memory shortage be a problem in such case? Thank you in advance for educating me. ... View more