Mathematica 9 is now available
Student Support Forum
Student Support Forum: 'Problem with Solve and CDF' topicStudent Support Forum > General > Archives > "Problem with Solve and CDF"

Next Comment >Help | Reply To Topic
Author Comment/Response
david silverman
04/17/01 6:56pm


Here's my next problem with the F-distribution. I used:


as suggested, with Length[x]=920, Length[used]=0. Works great most of the time, but occassionally all I get is an error:

First::''normal'': ''Nonatomic expression expected at position 1 in First[fcut].''

So I ran the expression alone (without the ''ftemp=First['') to see what was being returned and it returned the word 'fcut' if gamma was less than 0.08. So I tried fooling with SetPrecision around the CDF portion, setting it to 30. Now I get answers for 0.05 and 0.06 but still only get 'fcut' for 0.08 and 0.07, everything's OK for 0.09 and above.

In case you need it, I'm using v4 on a pentium III xeon, $MachinePrecision=16

Thanks again,


URL: ,

Subject (listing for 'Problem with Solve and CDF')
Author Date Posted
Problem with Solve and CDF david silver... 04/17/01 6:56pm
Re: Problem with Solve and CDF Henry Lamb 04/18/01 3:26pm
Next Comment >Help | Reply To Topic