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5h
revised Proving the hairy ball theorem using xAct
edited tags
5h
comment Speed up derivative evaluation
You know that the gradient can be computed in one go, right? D[f[x, y], {{x, y}}]
6h
comment How to change the atom size of LatticeData
A replacement rule such as LatticeData[lattice, "Image"] /. Sphere[cents_, r_] :> Sphere[cents, 2 r] might work.
6h
revised How to change the atom size of LatticeData
edited tags
8h
comment Can Mathematica solve Plateau's problem (finding a minimal surface with specified boundary)?
With respect to generating normals: have you already seen this?
8h
comment How do I partition a matrix?
In fact, if you want to avoid Slot, you can use this instead: Composition[Through, {Most, Last}].
8h
revised A question about calculus and Programming
edited tags
8h
comment Interval Arithmetic with Symbolic Intervals
This might have something to do with the fact that everything is taken to be complex-valued unless explicitly told otherwise. What if you wrap things in an Assuming[] with the necessary assertions?
9h
comment Axis alignment identical to matlab plots
As OP wanted a ViewPoint as close to the default as possible, a setting that is a modestly sized multiple of {1.3, -2.4, 2.} might be appropriate.
9h
comment How do I partition a matrix?
"ease a new user into understanding" - then I submit that my proposal is less cognitively demanding to the OP. ;)
10h
comment How do I partition a matrix?
Also works: {Drop[matrix, None, -1], matrix[[All, -1]]} // Transpose.
13h
comment How can I customize the tooltips on a ContourPlot?
I know. :) Since you mentioned scientific notation, I just made a note on how to construct it. (I'll upvote when I can again.)
13h
comment How can I customize the tooltips on a ContourPlot?
There's a Log10[] function, but MantissaExponent[] might be a better choice here.
17h
comment Why does having many Print statements slow down my code?
Okay; does PrintTemporary[] also incur a speed penalty when used?
17h
revised Where is f2mma.zip, Fortran to Mathematica converter?
edited tags
17h
comment Where is f2mma.zip, Fortran to Mathematica converter?
Before anyone else tries it out: the Wayback Machine was not able to save a copy of the sought *.zip file. :(
17h
revised Setting up two ordinary differential equations
deleted 2 characters in body; edited title
17h
comment How to further accelerate arithmetic with Fermat Pseudoprime and Fibonacci number
One more thing: I'd use PowerMod[] instead of using Divisible[] on a big pseudoprime for testing Fermat's little theorem.
18h
comment Why does having many Print statements slow down my code?
How about replacing all instances of Print[] with Sow[] and enclose the entire beast in Reap[]? You can then study the list thus produced at leisure.
18h
comment Sign of a symbolic expression as a function of parameter values
Look up Reduce[]