Student Support Forum: 'Solve Error..?' topicStudent Support Forum > General > "Solve Error..?"

 Next Comment > Help | Reply To Topic
 Author Comment/Response June E.S 10/31/07 6:15pm I can't seem to find why I keep getting these errors when I try to do the following.. ClearAll; << Statistics`ContinuousDistributions` << Graphics`Graphics` << Statistics`DescriptiveStatistics` Clear[a, b, s, t, v, alpha, mdist] mdist = LogNormalDistribution[a, b]; lambdaNGL = 1/200974. lambdaNGU = 2*lambdaNGL s = Solve[{Quantile[mdist, 0.1] == lambdaNGL, Quantile[mdist, .50] == \ lambdaNGU}, {a, b}, Reals] a = s[[1, 2, 2]] b = s[[1, 1, 2]] meanX = Exp[a + 0.5b^2] varX = meanX^2(Exp[b^2] - 1) tau = (1/b)^2 Plot[PDF[mdist, z], {z, 0, .0001}] Export["LogNormPDFplot-LambdaKaw.eps", %] Plot[CDF[mdist, z], {z, 0, 0.0001}, PlotRange -> {{0, .0001}, {0, 1}}] The outputs are.. Out[49]= \!\(4.975768009792311`*^-6\) Out[50]= \!\(9.951536019584623`*^-6\) From In[43]:= \!\(\* RowBox[{\(Solve::"dinv"\), \(\(:\)\(\ \)\), "\<\"The expression \\!\\( LogNormalDistribution[\\(\\(a, b\\)\\)]\\) involves unknowns in more \ than one argument, so inverse functions cannot be used. \\!\\(\\*ButtonBox[\\\ \"More URL: ,

 Subject (listing for 'Solve Error..?') Author Date Posted Solve Error..? June E.S 10/31/07 6:15pm Re: Solve Error..? yehuda ben-s... 11/04/07 01:09am
 Next Comment > Help | Reply To Topic