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visits member for 2 years, 8 months
seen 7 hours ago

Code for my breathing avatar here


You may contact me at: BelisariusForSO@gmail.com

But please don't email me with requests about Q&A. Post them in the site instead.

Infix should be used only where it is essential... like in "feliz año nuevo" @rm-rf


8h
comment Are there more pre-existed ColorFunction options?
And here reference.wolfram.com/mathematica/guide/ColorSchemes.html
8h
comment Are there more pre-existed ColorFunction options?
See here reference.wolfram.com/mathematica/ref/ColorData.html
15h
comment Creating a three dimensional fullerene molecule
NB in v9 FindCycle[] is still a Combinatorica function
15h
comment Invisible plots
You probably want SetDelayed[] as in ClearAll["Global`*"];y1[t_] := RandomReal[{.1, 4}]*Cos[5 t + RandomReal[.1, 4]]; y2[t_] := RandomReal[{.1, 4}]*Cos[5 t + RandomReal[.1, 4]]; y3[t_] := y1[t] + y2[t];
17h
revised Plot Epilog FindMaximum
deleted 2 characters in body
18h
revised Working with calculations that depend on the previous value in a list
added 213 characters in body
19h
answered Working with calculations that depend on the previous value in a list
20h
answered Using Permutations to create numbers
21h
comment Comparing two ways of fitting systems of ODEs to data
With so many potential things that can go wrong in numerical methods a generic answer seems risky
22h
comment Plotting a moving ball for projectile motion with animate
@eldo The culprit is Kepler
23h
comment Stability region of midpoint method using Solve and RegionPlot
Plot3D[{Abs[(x + I y) + Sqrt[1 + (x + I y)^2]], Abs[(x + I y) - Sqrt[1 + (x + I y)^2]]}, {x, -2, 2}, {y, -2, 2}, PlotStyle -> {Red, Blue}]
1d
comment Stability region of midpoint method using Solve and RegionPlot
Show[RegionPlot[(Abs[(x + I y) + Sqrt[1 + (x + I y)^2]] <= 1), {x, -2, 2}, {y, -2, 2}], RegionPlot[ Abs[(x + I y) - Sqrt[1 + (x + I y)^2]] <= 1, {x, -2, 2}, {y, -2, 2}, PlotStyle -> Red]]
1d
revised Stability region of midpoint method using Solve and RegionPlot
added 48 characters in body
1d
comment Show command missing red dots from one of the function
@MichaelE2 Yup. That was Yves' comment at the question
1d
revised Show command missing red dots from one of the function
added 283 characters in body
1d
answered Show command missing red dots from one of the function
1d
comment Better way to test that a matrix is upper-triangular?
Ha! +1. I knew somebody would bite :D
1d
comment Better way to test that a matrix is upper-triangular?
I don't think it can be done any faster
1d
comment Export[] performance
These are the kind of issues that always prevent me for suggesting Mma as an enterprise production environment. Probably there is a solution using some mixed-language environment, but you never know where the devil's tail can flog you again. It's a very nice prototyping and R&D platform, though.
1d
awarded  Generalist