20,406 reputation
12769
bio website
location
age
visits member for 2 years, 7 months
seen 20 hours ago

22h
answered ToDiscreteTimeModel fails following video
1d
answered Use MATHEMATICA to calculate the volume of the solid
1d
comment Real and Imaginary parts of solutions to a complex linear ODE system
Is there an issue with getting the solution and then using Re and Im to separate the real and imaginary parts? May be coupled with the use of ComplexExpand? A full MWE also helps.
1d
comment Dsolve implicit solution to a Differential Equation
can you show an example of what you mean? That will take all the guessing out. A picture is worth 1,000 words.
Aug
29
revised Sum rule in integration not working
typo
Aug
29
answered How to solve two non-linear equations in two variables
Aug
29
revised Sum rule in integration not working
added 25 characters in body
Aug
29
revised Sum rule in integration not working
added 235 characters in body
Aug
29
answered Sum rule in integration not working
Aug
29
comment Volume enclosed by two surfaces of revolution
You do not need to integrate or differentiate to plot an expression, Just use the Plot command. f1 = Pi^2 Sin[x] (Cos[x]^3); f2 = 4 x^2; Plot[f1, {x, -2 Pi, 2 Pi}] Plot[f2, {x, -2 Pi, 2 Pi}] I get this: !Mathematica graphics
Aug
29
comment After editing a file Mathematica 10 interprets […]^2 as […(])^2
I can't reproduce it. V10 on windows. Screen shot. !Mathematica graphics may be you have some hidden char inserted by mistake. If you post the notebook somewhere may be someone can better help you.
Aug
28
accepted InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder
Aug
28
comment InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder
I see. So none of options such as PlotStyle used can be queried using AbsoluteOptions. Just tried it on normal plot: p0 = Plot[Sin[x], {x, -1, 1}, PlotStyle -> Red]; AbsoluteOptions[p0, PlotStyle] and this also gave an error. This makes AbsoluteOptions not as useful as I thought before. May be this is what the book means by "special options" in the screen shot I posted. Thanks.
Aug
28
comment InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder
@Mr.Wizard Yes, but this is one part of it. The other part is why I get an error when query this option? I did not want to split this to 2 questions. But may be I should have. What do you think? Should they be separate? I can do that. ps. the slow down is really large as can be seen by the numbers. A bit of slow down ok, but 10 times slower?
Aug
28
revised InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder
forgot to past f
Aug
28
asked InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder
Aug
28
comment The correct pattern for Cases
nice. May be you explain a little for us newbies how this works :)
Aug
28
answered The correct pattern for Cases
Aug
26
awarded  Nice Question
Aug
25
answered implement the ZOH in mathematica