I am running a Job to calculate "Survival Analysis" using Proc Phreg Procedure for 2 Vehicle populaton's Survival analysis after some counter Measure. The below Warning and Error is showing after Proc Phreg Procedure in Log file: NOTE: No BY variables in the COVARIATES= data set. The entire COVARIATES= data set is used for every BY group NOTE: Convergence criterion (GCONV=1E-8) satisfied. NOTE: The above message was for the following by-group:.. WARNING: Ridging has failed to improve the loglikelihood. You may want to increase the initial ridge value (RIDGEINIT= option), or use a different ridging technique (RIDGING= option), or switch to using linesearch to reduce the step size (RIDGING=NONE), or specify a new set of parameter estimates (INITIAL= option). ERROR: Floating Point Overflow. ERROR: Termination due to Floating Point Exception NOTE: The SAS System stopped processing this step because of errors. NOTE: SAS set option OBS=0 and will continue to check statements. This may cause NOTE: No observations in data set. WARNING: The data set ELG_PE may be incomplete. When this step was stopped there were 86 observations and 15 variables. WARNING: The data set PRED3 may be incomplete. When this step was stopped there were 5406 observations and 10 variables. After implementing RIDGING=None or RIDGING=Absolute option in Model statement as per Log Job was able to finish without any Errors and warnings. Can you please explain what is the Ridging =None or aboslute option do in model statement, How its going to prevent the above error happening and how it improves Log Likelyhood ratio.
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