Verbeia

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Moderator of Mathematica.SE and Celtic goddess.

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	14,629 reputation	bio	website		visits	member for	1 year, 4 months
234101 badges		location	Sydney, Australia		seen	1 min ago

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Mar 12	comment	How can I multiply matrix and vector element wise like Numpy? See somewhat related question on StackOverflow: stackoverflow.com/a/7663695/758485
Mar 10	comment	Unable to convert $\TeX$ input into mathematica Works for me on version 8.0.4, Mac OS X. But make sure you do have doubled backslashes - cutting one out gives the error `Syntax::stresc: Unknown string escape \s.`.
Mar 9	comment	How to partition a disk into individually spaced bricks? @Szabolcs it's related but he is asking for a different layout algorithm where (a) the words are all in the same point size and (b) layout is sequential from top to bottom in a brick-like offset grid.
Mar 9	comment	AbsoluteTiming affected by surrounding code @mmorris there is a badge for accepting your own answer when it has 3 or more upvotes, so self-accepting a good answer is perfectable... uh.... acceptable. And what Sjoerd said.
Mar 9	comment	Deleting parts of a large list As a general coding style comment, I would suggest that you replace all those sets of double-brackets `[[1]][[1]][[1]]` with the equivalent `[[1, 1, 1]]`. It will be much easier to read.
Mar 9	comment	Deleting parts of a large list My +1 is not just because you mentioned GDP in Australia, but it helps :)
Mar 8	comment	Are there advantages to using additional arguments of common functions rather than alternative ways of calculating with lists? @SjoerdC.deVries actually I didn't either until writing this question. I would normally do something involving two `Transpose` functions. I am sure there are other examples I can add to this question.
Mar 8	comment	Clustering of space-time data Well, yes, my algorithm (if you can call the 15 minutes I spend faffing around getting the `Join` function right) is sensitive to the $d$ threshold.
Mar 8	comment	Clustering of space-time data Because I delete short "clusters". Also I think in the first sequence, the gaze was fixed. I actually should have used a slightly larger $d$ threshold.
Mar 7	comment	Working with large data, pass-by-reference, compiled functions @ruebenko Interesting - does that actually speed things up, though?
Mar 6	comment	Labeling a bar chart, changing how rotated labels are centered You could try including an `AdjustmentBox` in your `Placed` function. I haven't time to write this up as a full answer just now but someone else might like to try.
Mar 6	comment	Efficiently Visualising Very Large Data Sets (without running out of memory) @Sjoerd I fixed up the question title and inserted the input data and function.
Mar 5	comment	How to create a histogram of annual events, such as cherry blossom time You could also use `DaysBetween` from the Calendar package to implement `DayOfYear`.
Mar 5	comment	Efficient way to generate random points with a predefined lower bound on their pairwise Euclidean distance This is a very creative answer, +1! There seems to be a relationship between the dimensions of `canvas` and the maximum number of possible iterations in the `Nest` function (and therefore number of points). Changing the 150 to 180 without also increasing `canvas` gives a range of errors including `RandomChoice::lrwl: "The items for choice {} should be a list or a rule weights -> choices."`
Mar 5	comment	Labels and tickmarks inside Frame Ted, do you mean something like the last graph in this question?
Mar 5	comment	Labels and tickmarks inside Frame You can fix the size of the graphic and the plot area simultaneously using `ImagePadding` as well as `ImageSize`. But some organizations use this style for their graphs so it would be useful to replicate.
Mar 4	comment	Trying to simplify Root expressions from the output of Eigenvalues You don't need the `//N` for `matrixB`: there is an analytical solution. If the highest power of the eigenvalues for matrixA is higher than those for matrixB, they won't be "as simple".
Mar 4	comment	Rearranging a Polynomial Sorry Tim, on my screen the first formula looked like it had a minus not a plus. I have deleted my comment. You know you can use LaTeX markup on the site?
Mar 4	comment	Are there rules of thumb for knowing when RandomVariate is more efficient than RandomReal? @Rojo It doesn't seem to be in the main documentation for `RandomReal` in v8, but can be verified to work with `Histogram@RandomReal[NormalDistribution[0, 1], 1000]`. It is the way to do it in version 7, and I hadn't adapted to `RandomVariate` yet.
Mar 1	comment	Generate a Unit Circle Trigonometry doesn't `tFormat` need to include how the thing should look if the condition is False, i.e., unaltered `t2`? Or was that the thing for 500 to work out on his own?