belisarius
Reputation
98/100 score
 Mar 6 comment Not seeing plot of solution returned by NDSolve Also, I don't believe you need DynamicModule[] for that Mar 6 revised Not seeing plot of solution returned by NDSolve added 7 characters in body Mar 6 comment How can I convert a Piecewise into a nested If? Just joking. Or not :) Mar 6 comment How can I convert a Piecewise into a nested If? @rasher He's migrating the code, so no lists on the new platform either :)} Mar 6 answered Not seeing plot of solution returned by NDSolve Mar 6 comment Not seeing plot of solution returned by NDSolve have you been able to run the NDSolve[]and/or the ParametricPlot[] outside the Manipulate (I mean as a stand-alone code)? Mar 6 revised Not seeing plot of solution returned by NDSolve deleted 72 characters in body Mar 6 revised How can I convert a Piecewise into a nested If? added 51 characters in body Mar 6 answered How can I convert a Piecewise into a nested If? Mar 6 reviewed Leave Closed Unknown number of variables in a logical statement Mar 6 comment RecurrenceTable @BohanLu Try it again after restarting Mathematica. The problem is likely that you already assigned values to your symbols by using Set, so the whole thing is misbehaving. Mar 5 answered RecurrenceTable Mar 5 comment Extract the divergent/bounded part of a certain expression I believe you're talking about a power Series. Otherwise you can always manipulate any expression to have as many "divergent" parts as you want cancelling out themselves when you add them up Mar 5 comment Calculating the rank of an abstract matrix From the docs: MatrixRank assumes all symbols to be independent Mar 5 revised Find the volume & weight of a US$4,000,000 gold ingot added 155 characters in body Mar 5 comment Functional-programming virus infection @PabloGalindoSalgado I would just ensure that (without deaths) the total pop in each cell remains constant and proportionally distributed to the I[n] and S[n] coefficients. Although perhaps the non-neg limit ought to be enforced. Mar 5 comment Mathematica not seeing my environment/system variables Please try GetEnvironment[] Mar 5 comment Functional-programming virus infection @PabloGalindoSalgado Done. But I don't think that is a good way to "normalize" results Mar 5 comment Truncate a sum in a 'smart' way Like Sum[If[2 - n/2 >= 0, 0, c[n] r^(2 - n/2)] + d[n] r^(-n/2), {n, Infinity}]? Mar 5 answered Find the volume & weight of a US$4,000,000 gold ingot