8.22 April 8, 2013
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Top new questions this week:
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[Sketch-type graphics with transparency and dashed hidden
lines?]\url{http://mathematica.stackexchange.com/questions/45410/sketch-typ
e-graphics-with-transparency-and-dashed-hidden-lines}
I'd like to create transparent graphs like the following from P1095,
Calculus 6th Ed, by James Stewart. Can Mathematica accomplish this? By
"transparent," I mean the ability to see the interior, ...
- asked by LePressentiment (18 votes), answered by Silvia (35 votes)
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[Animating moving surface of
torus]\url{http://mathematica.stackexchange.com/questions/45417/animating-m
oving-surface-of-torus}
I would like to try to recreate something similar to Paolo eri's torus
animation:
I have isolated the moving surface torus section form this Wolfram
Demonstration by Kevin Sonnanburg:
t = s; s = ...
- asked by martin (11 votes), answered by Kuba (15 votes)
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[Fit two intersecting straight lines in
Mathematica]\url{http://mathematica.stackexchange.com/questions/45401/fit-t
wo-intersecting-straight-lines-in-mathematica}
I am trying to do a Kurie analysis of the double beta decay of
Strontium-90.
Here we have two straight sections, and I need to obtain a value for the
intersection along with an error for it. I ...
- asked by ephimetheus (11 votes), answered by Vitaliy Kaurov (13 votes)
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[Plotting Fourier spectrum versus frequency of a
signal]\url{http://mathematica.stackexchange.com/questions/45502/plotting-f
ourier-spectrum-versus-frequency-of-a-signal}
I have looked around here, and i am sure this has been answered, but i
don't understand it. The thing is, I have taken a introductory signal
processing course, and we had to use Mathematica, and i had ...
- asked by mickey (10 votes), answered by Vitaliy Kaurov (17 votes)
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[Wikipedia People only
search]\url{http://mathematica.stackexchange.com/questions/45393/wikipedia-
people-only-search}
I am trying to search people from Wikipedia(For example .*John.* in
REGEX).
The following query is close, but it isn't generalized like .*John.* and
only gives back historic figures that have ...
- asked by Liam William (8 votes), answered by Michael Hale (8 votes)
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[Smoothing ListContourPlot
contours]\url{http://mathematica.stackexchange.com/questions/45519/smoothin
g-listcontourplot-contours}
I have some data of type {{x1, y1, f1}, {x2, y2, f2}, ...} and want to
do ListContourPlot. However, there is a problem that the data f is not
smooth enough and has small errors.
Here is a toy ...
- asked by Yi Wang (7 votes), answered by Rahul Narain (8 votes)
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[Half-delayed
evaluation]\url{http://mathematica.stackexchange.com/questions/45361/half-d
elayed-evaluation}
In a certain wider context, I need to make some delayed definitions,
such as x := a + b + c, but within these definitions I want a and b to
be evaluated to their current values, not their later ...
- asked by Dror Bar-Natan (7 votes), answered by WReach (5 votes)
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Greatest hits from previous weeks:
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[How do I plot coordinates (latitude and longitude pairs) on a
geographic
map?]\url{http://mathematica.stackexchange.com/questions/2076/how-do-i-plot
-coordinates-latitude-and-longitude-pairs-on-a-geographic-map}
I'm attempting for the first time to create a map within Mathematica. In
particular, I would like to take an output of points and plot them
according to their lat/long values over a geographic map. I ...
- asked by Peter House (36 votes), answered by kguler (24 votes)
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[What are the most common pitfalls awaiting new
users?]\url{http://mathematica.stackexchange.com/questions/18393/what-are-t
he-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 belisarius (134 votes), answered by Michael E2 (67 votes)
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Can you answer these?
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[How to not include data value outside plot range in the
plot]\url{http://mathematica.stackexchange.com/questions/45537/how-to-not-i
nclude-data-value-outside-plot-range-in-the-plot}
Consider this list plot
ls = Table[Sin[t], {t, 0, 100, 0.1}];
p = ListPlot[ls, PlotRange -> {{0., 0.1}, All}, DataRange -> {0,
1}, Joined -> True]
If we look at the data in the plot, we ...
- asked by xslittlegrass (2 votes)
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[Finding undetermined coefficients with boundary
conditions]\url{http://mathematica.stackexchange.com/questions/45219/findin
g-undetermined-coefficients-with-boundary-conditions}
I have 2 equations which are;
To[x_] := c1 E^(-a1 x)/2 + c2 E^(a1 x)/2 + a2
Tu[x_] := c3 E^(-a3 x)/2 + c4 E^(a3 x)/2
Tu equals almost zero (10^-6) at end of the wires.
To must be equal to Tu at ...
- asked by CanYusuf (1 vote)
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[Why does setting $Assumptions make my Fourier transforms
slow?]\url{http://mathematica.stackexchange.com/questions/45258/why-does-se
tting-assumptions-make-my-fourier-transforms-slow}
Consider these Fourier transforms
AbsoluteTiming[FourierTransform[Exp[(-I)*\[Omega]0*t]*Exp[-t^2], t, \[Omega]]; ]
AbsoluteTiming[FourierTransform[Exp[(-I)*\[Omega]0*t]*Exp[-(t/T0)^2], t, \[Omega]]; ]
...
- asked by xslittlegrass (2 votes)