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Mathematica : Recent Questions and Answers (Page 76)

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

How to add a legend in a Mathematica Graphics package?

Suppose that I have Graphics[ {{Point[{0,1}], Black},{Point[{1,1}], Blue}}] which plots a black point and a blue point next to each other. Now, I want to add a legend as with...

Asked on 06/16/2021

0 answer

Fitting ellipse to 5 given points on the plane

Five points are required to define a unique ellipse. An ellipse has five degrees of freedom: the $x$ and $y$ coordinates of each focus, and the sum of the distance...

Asked on 06/16/2021 by user153012

3 answer

Exploring curl of a gradient of a scalar function

Suppose I want to explore $nabla times nabla V$ where $V$ is some scalar function. It basically results in a zero. But I would only know why...

Asked on 06/16/2021

1 answer

VectorScaling on VectorPlot produces vectors of wrong length

I'm trying to plot the following VectorField:VectorPlot[{x/Sqrt[x^2 + y^2], y/Sqrt[x^2 + y^2]}, {x, -5, 5}, {y, -5, 5}]I want to use a VectorScaling-option such that vectors are displayed accoring...

Asked on 06/16/2021 by Babelfish

1 answer

Plotting data from a list of rules, infer axis titles from the rules with units

I have data, with units, organized as a list of rules; this is so I can slice the data in different ways based on the variables represented. I'm trying to...

Asked on 06/15/2021

2 answer

Plot an array of complex numbers

In version 12.0 Mathematica introduced a new function ComplexPlot. So how can I plot an array of complex numbers, with ArrayPlot, that colors the numbers in a similar way to...

Asked on 06/15/2021 by t-smart

0 answer

Wolfram Workbench slow to open notebooks

Has anyone found a way to speed up the launch of .nb files within Wolfram Workbench? On my computer it takes a good 30 seconds at least, which is a...

Asked on 06/15/2021 by Aidan Montare

0 answer

NDSOLVE-Error ("For the method !("IDA"), only machine real code is available. "

I am trying to solve mass transfer equations in an adsorption column to obtain the breakthrough curves. Previously, I asked a question on this and received great help:NDSolve for...

Asked on 06/15/2021 by Saeb

0 answer

How to plot the max value of a coordinate using ListDensityPlot?

I would like to plot y×x from a list with 3 levels using ListDensityPlot. Each sublevel of the list have coordinates of the type{{x,y,z1}, {x,y,z2}, {x,y,z3}, {x,y,z4}} I...

Asked on 06/15/2021

3 answer

Select from list using a TogglerBar to specify one or several criteria

Simple version of my problem. Create a list of 50 integers. Create a TogglerBar to select one or more members of the list. Use Select to select sublists from the...

Asked on 06/15/2021 by George Wolfe

1 answer

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