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Mathematica : Recent Questions and Answers (Page 22)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

How can I improve the results of numerical integration using `NIntegrate`?

Fn[x_, y_, z_, r_, br_] = -1536 Im[( 6 Cos[z] + 2 Cos[x] (3 + (-7 + 3...

Asked on 09/03/2021

2 answer

How can I obtain the matrices of coefficients of quadratic form?

I'm trying to find the matrices of coefficients of a quadratic form:Clear["Global`*"]x[1] = CDF[NormalDistribution[[Mu], [Sigma]], c];x[2] = Expectation[x^2 [Conditioned] x > c, x [Distributed] NormalDistribution[[Mu], [Sigma]]];x[3]...

Asked on 09/03/2021

1 answer

How to insert letters in a "word"?

I have: list = {{1, AGR}, {2, AUS}, {3, AUT}};but I want the following using Table[.].mmARG = mmB[1];mmAUS = mmB[2];mmAUT = mmB[3];Any idea?...

Asked on 09/03/2021

2 answer

Synchronising time series and video display

If I have a video at a known frame rate, and a time series of sensor readings taken at the same time. How can I play back the video and...

Asked on 09/03/2021

1 answer

Remove or delete elements

I have the following list:i=2k=3 list = Tuples[Tuples[{0, 1}, i], k]{{{0, 0}, {0, 0}, {0, 0}}, {{0, 0}, {0, 0}, {0, 1}}, {{0, 0}, {0, 0}, {1, 0}}, {{0,...

Asked on 09/03/2021 by Y.L

1 answer

Generating points inside convexhullmesh

How could I generate these pointshexagon={{0, Sqrt[3]/2}, {1/2, Sqrt[3]}, {3/2, Sqrt[3]}, {2, Sqrt[3]/2}, {3/2, 0}, {1/2, 0}}following this rulepts[x_, y_] := Flatten[Table[{{3 j, Sqrt[3] k}}, {j,...

Asked on 09/03/2021

1 answer

ToElementMesh Error/General meshing strategies

I am trying to create a mesh using ToBoundaryMesh as opposed to DiscretizeRegion. I was hoping this would be a better strategy since most of the action in the problem...

Asked on 09/02/2021

1 answer

Multivariate linear regression

Say I have a 4-dimensional data set with two independent variables x1, x2, and two dependent variables y1, y2, i.e. each row is {x1, x2, y1, y2}:data = RandomReal[{0,...

Asked on 09/02/2021

3 answer

How to apply ColorFunction only to data visible within PlotRange?

The following:data = Table[i, {i, -10, 10, 0.1}];ListPlot[data, DataRange -> {-10, 10}, Joined -> True, PlotRange -> {{-10, 10}, {-5, 5}}, ...

Asked on 09/02/2021 by CA Trevillian

1 answer

Fitting an integral function given a set of data points

I have a set of measures of the resistivity of a given material at different thicknesses and I'm trying to fit them using the Fuchs-Sondheimer model. My code is:data...

Asked on 09/02/2021

1 answer

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