8.19 August 20, 2013
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Top new questions this week:
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[What bug fixes can be implemented in
init.m?]\url{http://mathematica.stackexchange.com/questions/30599/what-bug-
fixes-can-be-implemented-in-init-m}
In comments on this question, Mr. Wizard suggested a community wiki to
share the bug fixes/workarounds (or possibly other tricks) people load
in their init.m. I think this could provide a nice ...
- asked by jkrich (16 votes), answered by Mr.Wizard (8 votes)
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[when is f@g not the same as
f[g]?]\url{http://mathematica.stackexchange.com/questions/30425/when-is-fg-
not-the-same-as-fg}
I have always thought that f@g will give the same result as f[g] in all
cases, and it is just a matter of style which one to use and that g will
always evaluates first, and then f will evaluate using ...
- asked by Nasser (16 votes), answered by Mr.Wizard (22 votes)
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[Blend code for "Sunset
Colors"]\url{http://mathematica.stackexchange.com/questions/30508/blend-cod
e-for-sunset-colors}
Hi I want to get a blend similar to "SunsetColors". To make those slight
modifications, I would like to know the precise blend of that
ColorScheme.
My try:
Graphics[Table[{Blend[{Black, ...
- asked by Francisco (14 votes), answered by Simon Woods (13 votes)
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[Looking for a way to insert multiple elements into multiple positions
simultaneously in a
list]\url{http://mathematica.stackexchange.com/questions/30647/looking-for-
a-way-to-insert-multiple-elements-into-multiple-positions-simultaneo}
I would like to take the following data:
insertvalues = {r, x};
insertpositions = {{1}, {5}};
origlist = {a, b, c, d, e, f, g};
and generate output that looks like this:
{r,a,b,c,d,x,e,f,g}
...
- asked by Todd Allen (13 votes), answered by Mr.Wizard (14 votes)
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[How can I manipulate
TemporalData?]\url{http://mathematica.stackexchange.com/questions/30712/how
-can-i-manipulate-temporaldata}
Version 9 introduced TemporalData but, truth be told, the documentation
doesn't suggest that one can do much with it. Many of us have probably
assumed we'd be better off sticking with the date-value ...
- asked by Verbeia (13 votes), answered by Verbeia (15 votes)
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[Measure perimeter of black edge in
Mathematica]\url{http://mathematica.stackexchange.com/questions/30461/measu
re-perimeter-of-black-edge-in-mathematica}
I have a pattern like the one below. How could I measure the total
length of the perimeter of the black/white edge? This would give me a
measure of spatial frequency. Any tips would be great!
Thanks!
...
- asked by Levi (13 votes), answered by belisarius (11 votes)
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[Filtering elements from a list that appear only
once]\url{http://mathematica.stackexchange.com/questions/30610/filtering-el
ements-from-a-list-that-appear-only-once}
I want to be able to select elements from a list that only appear once.
I originally had this:
Select[Table[Count[list, i], {i, list}], # == 1]
But the issue is that my list has about 60,000 ...
- asked by Mark (12 votes), answered by belisarius (17 votes)
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Greatest hits from previous weeks:
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[How to create hedcut style
images?]\url{http://mathematica.stackexchange.com/questions/8716/how-to-cre
ate-hedcut-style-images}
Yesterday the hedcut style was brought up in chat. How can we create a
hedcut-like style automatically in Mathematica, using a photograph as a
starting point?
I am looking to create a similar ...
- asked by Szabolcs (43 votes), answered by Simon Woods (32 votes)
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[Plotting Complex Quantity
Functions]\url{http://mathematica.stackexchange.com/questions/3458/plotting
-complex-quantity-functions}
Trying to plot with complex quantities seems not to work properly in
what I want to accomplish. I would like to know if there is a general
rule/way of plotting when you have complex counterparts in ...
- asked by night owl (8 votes), answered by Artes (12 votes)
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Can you answer these?
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[NDSolve: ProcessEquations and Reinitialize with Piecewise
functions]\url{http://mathematica.stackexchange.com/questions/30426/ndsolve
-processequations-and-reinitialize-with-piecewise-functions}
I am having trouble with using NDSolve`Reinitialize when the system
consists of a pieceise function.
If we define the ODE system
simplesys = {r'[t] ==
Piecewise[{{1, 0 <= t <= 10}, {0, 10 ...
- asked by jaclea (3 votes)
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[Does one need to be careful about loading multiple (many) contexts or
packages in the same
session?]\url{http://mathematica.stackexchange.com/questions/30758/does-one
-need-to-be-careful-about-loading-multiple-many-contexts-or-packages-i}
I have a number of large pieces of precomputed data which I am
considering putting into individual packages in order to load them (via
DeclarePackage) and unload them (via Leonid Shifrin's ...
- asked by Tobias Hagge (4 votes)
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[Mathematica and strong
AI]\url{http://mathematica.stackexchange.com/questions/30585/mathematica-an
d-strong-ai}
David Deutsch (physicist / quantum computing theorist) wrote an article
for Aeon Magazine last year: On Artificial Intelligence that got me
thinking.
The article assesses and critiques the ...
- asked by Jagra (7 votes)