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comment Plot is discontinuous (it shouldn't be)
@grdgfgr it doesn't have to evaluate to purely real to appear plotted. The ratio of imaginary to real part just has to be below some threshold. See e.g. Plot[Sin[x]+10^-15I,{x,-3,3}], it'll be plotted where the real part is greater than about 0.1.
Jun
18
comment Why do Mathematica list indices start at 1?
In lower level languages like C indexing arrays from 0 is more natural because there the indices work as offsets, i.e. if you have a pointer p, then p[0] is the same as *(p+0) and the same as *p and the same as 0[p].
Jun
9
revised Weird plot with SphericalPlot3D
Convert letters to unicode, remove extra newlines from the code
Jun
9
comment Weird plot with SphericalPlot3D
You can avoid pasting these \[Theta]-like sequences by converting them to their Unicode counterparts using this web app.
Jun
9
suggested approved edit on Weird plot with SphericalPlot3D
Jun
7
comment How to properly generate messages from LibraryLink function?
How does this extend to messages with arguments, like e.g. NIntegrate::inumr, which looks like The integrand `1` has evaluated to...? I.e. how do I pass these arguments from the function?
Jun
7
revised How to properly generate messages from LibraryLink function?
edited title
Jun
7
revised How to properly generate messages from LibraryLink function?
Simplify the test case and remove unneeded dependencies
Jun
7
revised How to improve performance of BesselJ to the level of GSL?
compress code a bit
Jun
7
asked How to properly generate messages from LibraryLink function?
Jun
5
accepted How to improve performance of BesselJ to the level of GSL?
Jun
3
awarded  Nice Answer
Jun
3
awarded  Nice Question
Jun
2
awarded  Nice Question
Jun
2
answered How to improve performance of BesselJ to the level of GSL?
Jun
2
asked How to improve performance of BesselJ to the level of GSL?
Jun
1
comment Integrate gives wrong results
@CompuChip how does $a$ being complex validate Mathematica output? The integral is still non-zero for e.g. $a=1+3i$.
May
29
comment Get a “step-by-step” evaluation in Mathematica
That's an interesting integrator, but sometimes its rules are too general to be used as a step-by-step solution provider. E.g. I wanted to see a step-by-step integration of Sin[x] Exp[-x/a] WRT x, and all I got was the complete antiderivative via rule 4144, not a step a human would take like e.g. integration by parts, which W|A suggests in this case.
May
23
awarded  Self-Learner
May
23
accepted How to define $\operatorname{Mc}$ and $\operatorname{Ms}$ Mathieu functions in terms of MathieuC and MathieuS?