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Apr
14
comment Does RunProcess work on Chinese Windows?
maybe it's confusing it with DueProcess which would explain the $Failed (runs away)
Apr
6
comment How to make the computer consider two numbers equal up to a certain precision
@rasher Moderators cannot change votes. You can make a dummy edit, reverse your vote and then undo the edit within the minute. (there will be a note in the history that you edited the post, but the contents will remain the same)
Mar
14
comment Performing analysis of data extracted from an SQL database
If out is your expression w/o TableForm, then Evaluate[Symbol /@ First@out] = Transpose@Rest@out should work. This doesn't have anything to do with SQL queries though...
Mar
14
comment How to make a notebook that will be window maximized when open?
I think you accidentally posted the same answer in two places
Mar
11
comment How to implement the dual Lagrange?
It's open now @SjoerdC.deVries
Mar
9
comment Simulation of the semicircle Wigner Theorem
What is your question?
Mar
8
comment Is Daylight Savings Time accounted for when using AbsoluteTime[]?
This is the first thing mentioned in the documentation — "AbsoluteTime[] uses whatever date and time have been set on your computer system. It performs no corrections for time zones, daylight saving time, etc. "
Mar
6
comment Two identical functions give different answers
This should probably just be a comment...
Feb
28
comment Diagonal minors of matrix
"Since I am going to calculate the minors of big matrices and I only need to know the diagonal elements, is there a way just to calculate the diagonal elements in minor matrix?" — Surely, performance is an issue here.
Feb
10
comment Convex optimization
@DanielLichtblau The remark included the clause following it — "and enforce sparsity". NMinimize handles $\ell_1$ minimization fine. In compressive sensing/sparse theory, one wishes to solve an $\ell_0$ minimization problem, but because that is NP-hard, you do $\ell_p,\ 0<p\le 1$ minimization under certain assumptions/conditions and with other possibly non-linear constraints. I guess my phrasing wasn't the best way to put it but nothing better comes to mind now... will update it if I think of something better.
Feb
8
comment Convex optimization
@rhermans I missed your 200 bounty (was on vacation) but I hope the answer is helpful :)
Feb
8
comment Convex optimization
@rhermans I missed your 200 bounty (was on vacation) but I hope the answer is helpful :)
Feb
1
comment Why Mathematica chooses bracket for function arguments over parenthesis?
"If function arguments are denotes as f(x), then array[i] could be used as array index.(c.f. Mathematica uses [[i]] here.)" — is (f + g)(x + y) parenthesizing and multiplying two terms or is it a function call (like (f + g)[x + y] in the current syntax)?
Jan
10
comment Invert Colors Stylesheet White on Black
You can also look at this answer of mine for some hints on what to change and where, and maybe also look through Mike Honeychurch's answers in notebooks/stylesheets tags. Also look through the Default.nb and Core.nb stylesheets for the base styles that you can modify. It's a lot of boring work.
Jan
10
comment Invert Colors Stylesheet White on Black
If the older one hasn't been answered because it is difficult, then yours won't be either. If the older one wasn't answered because it wasn't interesting, then yours probably won't be either... questions on stylesheets are fickle and often it's the case that the answer is "straightforward" but no one wants to do the grunt work. In any case, you might try sweetening the deal with a bounty on the original and see if someone will take the bait :)
Jan
7
comment Is there an equivalent of “pmtm” of MATLAB?
We can't help with C++/C# conversion either. You can look at the source code by typing edit pmtm. That should give you hints to proceed with your translation attempts.
Jan
7
comment Is there an equivalent of “pmtm” of MATLAB?
If you use MATLink, then it is as simple as pmtm = MFunction["pmtm", "OutputArguments" -> 2] after you initialize the package. You'd call it as {p, f} = pmtm[data, tapers, n, fs].
Jan
7
comment Apply ColorFunction to an Image
@DJJ I think this is what you're looking for: mathematica.stackexchange.com/a/67217/5 The question might even be a duplicate.
Jan
7
comment InterpolatingFunction used to work with mathematic 7 but not working with mathematica 10
See here: mathematica.stackexchange.com/a/28341/5
Jan
4
comment Speed up replacement using Rule Dispatch Associtation
I'm not surprised. It's not unconceivable that Transpose[DD1].DD1 is more complex (in terms of leaf count and computations involved) than just DD1. What I said in my previous two comments was that you should go back to the drawing board and see if you can use mathematics to simplify the problem before throwing it to Mathematica. Since we don't know the origins of your problem or how you arrive at kappa, we cannot help you there (nor is this necessarily the site for that).