================================== Top new questions this week: ==================================
[How do I remove grid from this photo?] http://mathematica.stackexchange.com/questions/88494/how-do-i-remove-grid-from-this-photo
I found this cat a month ago, and I’m not his owners’ friend so the mosquito grid was the inevitable problem. I would like to post-process this photo to get rid of it, but I don’t know exactly how ...
- asked by Nakilon (19 votes), answered by nikie (33 votes)
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[What is behind Mathematica’s experimental ‘FindFormula‘ function?] http://mathematica.stackexchange.com/questions/88511/what-is-behind-mathematicas-experimental-findformula-function
In version 10.2 there is a new experimental function: FindFormula.
I suspect that a genetic programming algorithm (symbolic regression) is behind this new feature but I can’t find any references.
My ...
- asked by vonjd (18 votes)
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[Is there a GraphicsPrimitiveQ (or a complete list of Heads of graphics primitives)?] http://mathematica.stackexchange.com/questions/88342/is-there-a-graphicsprimitiveq-or-a-complete-list-of-heads-of-graphics-primitive
For various reasons related to workflow associated with creating figures for journals, I am creating functions that will accept graphics primitives and a set of options and spit out a Graphics object ...
- asked by march (16 votes), answered by rcollyer (13 votes)
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[Symbolic area calculation for a parametric self-intersecting closed curve] http://mathematica.stackexchange.com/questions/88623/symbolic-area-calculation-for-a-parametric-self-intersecting-closed-curve
The parametric equation of the curve is:
\[\begin {cases} x &= -9 \sin (2 t)-5 \sin (3 t) \\[6pt] y & = 9 \cos (2 t)-5 \cos (3 t) \end {cases}\quad t\in [0,2\pi ]\]
which can be easily ...
- asked by LCFactorization (13 votes), answered by belisarius (21 votes)
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[What’s the point of ContainsAll, ContainsAny and friends?] http://mathematica.stackexchange.com/questions/88295/whats-the-point-of-containsall-containsany-and-friends
Mathematica 10.2 contains a few new functions that test set containment: ContainsAll, ContainsAny and a few others. The documentation mentions that these are equivalent to existing functions like ...
- asked by nikie (12 votes)
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[10.2 Dataset extraneous print using Transpose] http://mathematica.stackexchange.com/questions/88238/10-2-dataset-extraneous-print-using-transpose
Introduced in 10.2, fixed by paclet update (GeneralUtilities 10.2.1).
This is probably patch code in 10.2. Is there a way to turn off print with Transpose?
ds = <|"k1" -> <|"a" -> 1, ...
- asked by alancalvitti (11 votes), answered by Michael E2 (12 votes)
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[What will happen if I set ExclusionsStyle for points in 2D plot?] http://mathematica.stackexchange.com/questions/88479/what-will-happen-if-i-set-exclusionsstyle-for-points-in-2d-plot
For example
f[x_] := (x^5 - 4 x^2 + 1)/(x - 1/2); Plot[f[x], {x, -1, 2}, Exclusions -> {f[x] == 0}, ExclusionsStyle -> Dashed]
Has the ExclusionsStyle -> Dashed option done anything ...
- asked by xzczd (11 votes), answered by xzczd (13 votes)
================================== Greatest hits from previous weeks: ==================================
[No weekends please] http://mathematica.stackexchange.com/questions/78735/no-weekends-please
I need to get the DateValues of the last 30 days (starting from yesterday, not today!) excluding saturdays and sundays. I want that the dates are german time (GMT + 1). The only solution I have found ...
- asked by eldo (4 votes), answered by Pickett (12 votes)
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[Assign the results from a Solve to variable(s)] http://mathematica.stackexchange.com/questions/6669/assign-the-results-from-a-solve-to-variables
I understand Mathematica can’t assign the results of a Solve to the unknowns because there may be more than 1 solution. How can I assign the 4 values of following result to variables?
- asked by stevenvh (18 votes), answered by Artes (14 votes)
================================== Can you answer these? ==================================
[RegionPlot, RegionPlot3D and differing embedding dimensions] http://mathematica.stackexchange.com/questions/88584/regionplot-regionplot3d-and-differing-embedding-dimensions
RegionPlot seems to be for plotting regions with an embedding dimensions of 2 only, and RegionPlot3D for regions with an embedding dimensions of 3.
Yet passing a region of the wrong embedding ...
- asked by Szabolcs (5 votes)
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[How can I force the use of sparse diagonalization methods?] http://mathematica.stackexchange.com/questions/88551/how-can-i-force-the-use-of-sparse-diagonalization-methods
When I evaluate the Eigenvalues function on a very large (e.g. 2^16 x 2^16) sparse matrix, Mathematica says something like:
Because finding 65536 out of the 65536 eigenvalues and/or eigenvectors ...
- asked by P.R. (4 votes)
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[How to Copy formatted code without backslashes added?] http://mathematica.stackexchange.com/questions/88539/how-to-copy-formatted-code-without-backslashes-added
By default code copied from the FrontEnd is formatted with backslashes added at the ends of lines. For example, evaluating in a Notebook
Range[40]
and copying the output produces the following when ...
- asked by Alexey Popkov (9 votes)