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Feb
13
comment NMinimize seems to call function with the same values multiple times
Hmm, I wonder why manual memonization does not help. ClearAll@f; f[x_?NumericQ] := (f[x] = (Print[N[x, 10]]; x^2)); NMinimize[f[x], x, Method -> "RandomSearch"]. So I guess f gets converted/compiled under the hood...
Feb
11
comment Importing a large Excel file
I usually export to mx.gz (not that this format is not necessary compatible among versions and platforms, but it's an order of magnitude faster to work with). You might also take a look at HDF5.
Feb
10
comment Problem with With
@Alberto And the speed difference between the two is absolutely negligible for most applications.
Feb
10
comment Bare symbol invocation fails but not if used with an argument
Mhm, was just about to write that definitions can be made in another order, but when I tried it out fail1:=)
Feb
10
comment Problem with With
Didn't feel the need to post a seperate A. Hope you don't mind.
Feb
10
revised Problem with With
added 224 characters in body
Feb
7
comment How does the speed of WriteString compare to other languages?
I think absolute timing would be more appropriate here. I don't think I/O is counted under CPU time.
Feb
5
reviewed Approve Export Graphics using Move in Optica
Feb
5
comment Problem with Creating Mathematica Package
Why the Unprotect and ClearAll? (Usage symbols, or more exactly, creating the symbols in mypackage` instead of Private was the problem).
Feb
4
comment CUDALink with Nvidia GTX770
Did you take a look here? docs.nvidia.com/cuda/…. If I remember correctly, not all version of drivers are cuda compatible..
Feb
4
answered How to “reversely” replace definitions?
Jan
30
comment How to manipulate some list-plot in Mathematica
You should learn to format your code when asking Q, post self contained snippets and not use single capital letters in MMA.
Jan
29
answered Using Multiple Kernels When Making Plots
Jan
29
revised Using Multiple Kernels When Making Plots
code edit
Jan
29
comment Using Multiple Kernels When Making Plots
Any reason why you are not using ParallelTable or ParallelMap directly?
Jan
29
comment Why is my PageRank result in Mathematica converging this way?
@Pickett Should I delete this A then?
Jan
28
answered Why is my PageRank result in Mathematica converging this way?
Jan
28
comment Why is my PageRank result in Mathematica converging this way?
You have to look in the documentation. ` PageRankVector[g,TeleportProbability->0]`
Jan
25
comment About auto-compiling and performance between Do and Fold
Perhaps you have to decrease "FoldCompileLength" -> 100? As detalied here mathematica.stackexchange.com/a/1816/745. Also your function can easily be compiled manually, giving you more control (for example you can compile to C etc...)
Jan
25
reviewed Approve chemistry tag wiki excerpt