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RSS Feed for Wolfram Community showing any discussions in tag Algebra sorted by active[✓] Area under the curve of a Parametric Plot function?
http://community.wolfram.com/groups/-/m/t/1220905
I am looking to find the area under the curve of the a parametric plot function I tried to use a simple example but it's giving me two answers for each function rather than one when I use NIntegrate. Is there another way to get the area under the curve of the parametric plot ?
Thank you
ParametricPlot[{Sin[t], Sin[2 t]}, {t, 0, 1.57 }]
NIntegrate[{Sin[t], Sin[2 t]}, {t, 0, 1.57 }]Joeseph A2017-11-12T20:41:27ZHow is Dot product implemented in Mathematica?
http://community.wolfram.com/groups/-/m/t/1220277
How is the Dot product implemented in Mathematica?
Let's take for instance matrix multiplication.
I have a C++ function which does that in a more or less traditional way, but also making appropriate use of the cache memory, with parallelism and vectorization enabled.
Multiplying 2 matrices (1000x1000) takes ~1.6 sec in C++, on my machine. This is much slower than the same operation in Mathematica: ~ 0.18 sec.
I don't expect the source code. I'm just curious which generally known strategies are used, e.g. multi-threading.Sandu Ursu2017-11-11T15:45:52Z