| Author |
Comment/Response |
david silverman
|
 04/17/01 6:54pm
Thanks for the help with the F-distribution. I tried the same thing to get cumulative student t-distribution (i.e.,
gamma=0.25
x /. Solve[1 - gamma == CDF[StudentTDistribution[453], x], x]
but I get the error:
Solve::''tdep'': ''The equations appear to involve the variables to be solved for in an essentially non-algebraic way.''
\!\(ReplaceAll::''reps'' \(\(:\)\(\ \)\)
''\!\({\(Solve[\(\(\(\(0.75` == \(\(1\/2\\ \(\((1 + \
\(\(\(\(BetaRegularized[\(\(453\/\(453 + x\^2\), 1, 453\/2, 1\/2\)\)]\)\)\\ \
\(\(Sign[x]\)\)\)\))\)\)\)\)\)\), x\)\)]\)}\) is neither a list of \
replacement rules nor a valid dispatch table, and so cannot be used for \
replacing.''\)
I think it is because of the Sign[x], but I don't know how to get around it.
Thanks
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