================================== Top new questions this week: ==================================
[Finite element mesh not resolving features] https://mathematica.stackexchange.com/questions/156174/finite-element-mesh-not-resolving-features
I am trying to make a finite element mesh in 2D. The features are not found by ToElementMesh. This is a shelf bracket with nails. I build the region using RegionDifference and RegionUnion and the ...
- asked by Hugh (11 votes), answered by Young (9 votes)
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[Are the mail settings as given in preferences still programmatically accessible in V 11.2] https://mathematica.stackexchange.com/questions/156183/are-the-mail-settings-as-given-in-preferences-still-programmatically-accessible
In versions before 11.2 (and after 9) one could get the current settings as defined in the preferences (Internet & Email -> Mail Settings) with Options[SendMail]. As the options for SendMail have ...
- asked by Albert Retey (11 votes), answered by rhermans (9 votes)
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[Implement fractional Laplacian] https://mathematica.stackexchange.com/questions/156420/implement-fractional-laplacian
What is a way to implement the Fractional Laplacian with Mathematica?
How can we apply such implementation to numerically solve the problem
$$(-\Delta)^su = 1 \text{ in } B_1(0), \\ u = 0 \text{ in ...
- asked by Jay (9 votes), answered by Henrik Schumacher (14 votes)
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[Blur, GaussianFilter and ImageConvolve doesn’t work on some images] https://mathematica.stackexchange.com/questions/156210/blur-gaussianfilter-and-imageconvolve-doesnt-work-on-some-images
In versions 8.0.4 and 9.0.1 applying Blur to an image gives expected result:
img = Import["http://i.stack.imgur.com/UsJTa.png"] blurred = Blur[img, 5] ColorSeparate[blurred]
But ...
- asked by Alexey Popkov (9 votes), answered by Alexey Popkov (11 votes)
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[Error and uncertainty propagation: Is using Precision/Accuracy a sound strategy?] https://mathematica.stackexchange.com/questions/156481/error-and-uncertainty-propagation-is-using-precision-accuracy-a-sound-strategy
Questions
What are the available resources to deal with experimental error and uncertainty propagation in Mathematica? Given that Mathematica already uses linearized model of error propagation on ...
- asked by rhermans (8 votes)
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[Unexpected behavior using ‘ReplaceAll[]‘ for nested lists] https://mathematica.stackexchange.com/questions/156538/unexpected-behavior-using-replaceall-for-nested-lists
ReplaceAll[] might lead to unexpected behavior (at least it surprised me). I use ReplaceAll[] to convert a list (basically data cleanup). For the command: {{1, "2"}, {2, "3"}} /. {x_, _ } :> {x, ...
- asked by Dennis (7 votes), answered by Szabolcs (9 votes)
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[What are the possible Method option values for plotting functions?] https://mathematica.stackexchange.com/questions/156475/what-are-the-possible-method-option-values-for-plotting-functions
Many plotting functions have a Method options with descriptions like this:
Plot: "the method to use for refining curves" RegionPlot: "the method to use for refining regions" ContourPlot: "the method ...
- asked by Szabolcs (7 votes)
================================== Greatest hits from previous weeks: ==================================
[How to perform a multi-peak fitting?] https://mathematica.stackexchange.com/questions/26336/how-to-perform-a-multi-peak-fitting
I am wondering how to implement the multi-peak detecting and fitting in Mathematica. Following is an example of fitting the data using three peaks (such that the data ~ peak1 + peak2 + peak3).
The ...
- asked by Everett You (46 votes), answered by Silvia (47 votes)
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[How do I clear all user defined symbols?] https://mathematica.stackexchange.com/questions/850/how-do-i-clear-all-user-defined-symbols
Is there some way to do this other than going to Evaluation -> Quit kernel and firing a new one up?
- asked by niklasfi (55 votes), answered by Artes (54 votes)
================================== Can you answer these? ==================================
[Possible Symbolic Integration Bug] https://mathematica.stackexchange.com/questions/156215/possible-symbolic-integration-bug
Bug introduced between 5 and 8 and persisting through 11.2
I think I may have found a bug, and want to verify is this reproducible in other versions and platforms and not a mistake of mine.
I ...
- asked by yyli (5 votes)
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[Finding the slowest decay to a value for a 2D function] https://mathematica.stackexchange.com/questions/156338/finding-the-slowest-decay-to-a-value-for-a-2d-function
I have a function acf2[x,y] that describes the auto-correlation function of a simulated real surface, with a peak at the origin (acf2[0,0] = 1), and need to find the maximum distance from the origin ...
- asked by L.Todhunter (1 vote)
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[Can Mathematica run javascript on a website?] https://mathematica.stackexchange.com/questions/156377/can-mathematica-run-javascript-on-a-website
One way of running Javascript on a website is to use for instance Greasemonkey. By any chance, would it be possible to execute Javascript commands from Mathematica?
- asked by anderstood (1 vote)