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Mar
11
comment Transform 3D data into 2D color map like Matlab's surf/imagesc
It's probably because ListDensityPlot interpolates and tries to resample/refine it to a regular grid behind the scenes. I can't test this right now, but I'll take a look later in the day.
Mar
11
comment Remove the white margins of a Graphics3D figure
@kguler The email and real name fields are not publicly visible. You can check what is visible publicly by viewing your profile using an incognito session in Chrome (or its equivalent in FF/Safari/Opera/IE)
Mar
11
answered Transform 3D data into 2D color map like Matlab's surf/imagesc
Mar
11
revised How to get the determinant and inverse of a large sparse symmetric matrix?
deleted 85 characters in body; edited tags; edited title
Mar
10
reviewed Approve matrix tag wiki
Mar
10
revised Plot3D list elements
deleted 168 characters in body; edited tags
Mar
10
comment Horrific Looking Contour Integral in Mathematica Plot:
"looks awful... How can this be fixed?" — You should be more explicit in why you think the typesetting is awful and what how you want it to look like, else we'll only be wasting our time guessing how to make it less "awful to you" when we don't know why. Is it the kerning? Is it the $\mathbf{d}$? Is it the spacing? Is it the baseline alignment? Is it the colour?...
Mar
9
revised Octonions in Mathematica
added 67 characters in body
Mar
9
awarded  Good Answer
Mar
8
comment Version 8.0 integrates but Version 9.0.1 doesn't
I can reproduce this, but in future, please do not use the bugs tag until a few users have confirmed the behaviour.
Mar
8
revised How can PixelConstrained be emulated with DensityHistogram?
edited body
Mar
8
comment How can PixelConstrained be emulated with DensityHistogram?
@SjoerdC.deVries I agree that one has to go looking for it to actually see it, but it's also one of those things that if you happen to observe it, it's hard to not notice it again. I don't know if it's more noticeable in my case because I have a retina MBP (high pixel density) and mma is not optimized for it.
Mar
8
comment How can PixelConstrained be emulated with DensityHistogram?
@SjoerdC.deVries This is not an issue with the underlying code... only with the display (see my screenshot above), which is fixed with PixelConstrained
Mar
8
comment How can PixelConstrained be emulated with DensityHistogram?
@whuber Here's a screenshot from my session. Please zoom in well into the region I've marked. You'll see that the squares are all of different sizes.
Mar
8
answered How can PixelConstrained be emulated with DensityHistogram?
Mar
8
comment How can PixelConstrained be emulated with DensityHistogram?
@whuber No, I could reproduce it — the pixel sizes indeed are different (try exporting it as a pdf — it's more obvious there). The empty bins that he's talking about are the "white" parts.
Mar
8
revised What does the construct f[x_] := f[x] = … mean?
added 48 characters in body; edited title
Mar
8
comment SetDelayed and avoiding function calls through memoization
I think that question (and all its answers) pretty much address this question, so I'll mark it as duplicate so that others will know where to look as well. If that doesn't answer your question, please let me know (and the part that isn't answered).
Mar
8
comment How to define the tangent gradient operator?
Well, we get several questions/day that should've been asked on Mathematics instead, because the only difference between the two words is a single letter at the end. A lot of new users make this mistake because they do not know about the software. Our policy is migrate those quickly to the right site so that the OP can get their answer sooner rather than later. Your question was no different from them because you didn't have any indication that you were trying to solve this in Mathematica. You needn't be overly explicit — code that you've tried, or error messages, etc. would've given a hint.
Mar
8
comment SetDelayed and avoiding function calls through memoization
This is answered here: What does the construct f[x_] := f[x] = ... mean?