================================== Top new questions this week: ==================================
[Should I always be using Module in functions unless I explicitly want global variables?] http://mathematica.stackexchange.com/questions/126877/should-i-always-be-using-module-in-functions-unless-i-explicitly-want-global-var
I define functions a ton. In the past, I’ve mostly just defined my functions like:
myFunc[var1_]:=( var2=var1^2; Return@var2; )
And I haven’t run into too much trouble. If I wanted to be really ...
- asked by YungHummmma (15 votes), answered by WReach (18 votes)
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[Why this real integral yields imaginary results?] http://mathematica.stackexchange.com/questions/127301/why-this-real-integral-yields-imaginary-results
Integrate[(y - y^2 + x - x^2 + 2*x*y)/(1 - x - y),{x,0,1},{y, 0, 1}]
The above integral yields -1-4I/3 in Mathematica. Since the integrand is real (although
divergent at some points), how does ...
- asked by Chong Wang (12 votes), answered by bbgodfrey (12 votes)
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[Would it be a good idea to use Failure and FailureQ in own code] http://mathematica.stackexchange.com/questions/126908/would-it-be-a-good-idea-to-use-failure-and-failureq-in-own-code
Since version 10 (at least 10.0.2 but I think 10.0.0) there is Failure and since version 10.2 there is also FailureQ. As often the documentation is somewhat vague and says "Failure is generated by ...
- asked by Albert Retey (12 votes), answered by Leonid Shifrin (9 votes)
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[Display grayscale image as 3d plot] http://mathematica.stackexchange.com/questions/127210/display-grayscale-image-as-3d-plot
How to build 3d plot of grayscale image where x,y - pixel coordinates, z - pixel intensity?
I tried ListPlot3D[ImageData[image]], but ImageData gives just intensities. I suppose a possible solution ...
- asked by red1ynx (10 votes), answered by Kuba (11 votes)
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[Automatically draw ellipsoids around groups of select points] http://mathematica.stackexchange.com/questions/126899/automatically-draw-ellipsoids-around-groups-of-select-points
Suppose you have a ListPlot, and there are certain points you wish to emphasize belong to particular group. I would like to make a function that automatically draws an ellipsoid around a select group ...
- asked by SumNeuron (10 votes), answered by Szabolcs (11 votes)
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[Enter colors directly into notebook?] http://mathematica.stackexchange.com/questions/127245/enter-colors-directly-into-notebook
In Mathematica notebook interface, you can evaluate:
In[1]:= Black
and you get a colored squared representing the color. Then I can copy and paste this color square and use it as input, like so:
...
- asked by becko (9 votes), answered by WReach (10 votes)
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[Large Dataset query fails if column contains Missing] http://mathematica.stackexchange.com/questions/126851/large-dataset-query-fails-if-column-contains-missing
In version 11.0 (Win 8.1 Pro) a query on a large Dataset for a column that contains Missing fails most unceremoniously.
With
dsTest = AssociationThread[{"a", "b"}, If[Last@# == 10000, ...
- asked by Edmund (9 votes), answered by JasonB (7 votes)
================================== Greatest hits from previous weeks: ==================================
[Is there an open source implementation of Mathematica-the-language?] http://mathematica.stackexchange.com/questions/4454/is-there-an-open-source-implementation-of-mathematica-the-language
I’ve seen questions before such as "What is the best open-source equivalent for Mathematica?", but that specific question (and that line of inquiry in general) cares more about the computer algebra ...
- asked by sblom (81 votes), answered by Simon (63 votes)
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[What are the most common pitfalls awaiting new users?] http://mathematica.stackexchange.com/questions/18393/what-are-the-most-common-pitfalls-awaiting-new-users
As you may already know, Mathematica is a wonderful piece of software. However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be clearly seen from ...
- asked by Dr. belisarius (341 votes), answered by Michael E2 (195 votes)
================================== Can you answer these? ==================================
[Enable file completion by default?] http://mathematica.stackexchange.com/questions/127203/enable-file-completion-by-default
File completions work for Import and Get but not with << syntax as you can see:
Is there some way to enable this?
- asked by M.R. (2 votes)
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[Trouble with NIntegrate strategy "DoubleExponentialOscillatory" when trying to ListPlot the results] http://mathematica.stackexchange.com/questions/126832/trouble-with-nintegrate-strategy-doubleexponentialoscillatory-when-trying-to-l
Can someone point me in the right direction? I ’ve been puzzling with this for weeks...
I have a huge function (of the form f(y,)sin(x) ) to integrate in in region (0, Infinity) and I use ...
- asked by George13 (1 vote)
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[Using an umlaut for a keyboard shortcut] http://mathematica.stackexchange.com/questions/126909/using-an-umlaut-for-a-keyboard-shortcut
How can I define a keyboard shortcut based on an umlaut like ü?
KeyEvent in KeyEventTranslations.tr doesn’t seem to register umlaut based keyboard inputs. For example, after adding
...
- asked by Karsten 7. (3 votes)