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Mathematica : Recent Questions and Answers (Page 184)

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

How do you export the result of a RevolutionPlot3D to STL for printing?

How do you export the result of a RevolutionPlot3D to STL (STereoLithography) file format for printing? I am a tyro when it comes to 3D rendering and printing....

Asked on 01/24/2021 by Jeffrey Thomson

1 answer

Compile - Optimization of function calls - does it matter?

I was surprised to see that, in the results of CompilePrint for a function made with Compile, calls to Functions seemed to be "actually" making a copy of the arguments,...

Asked on 01/24/2021

1 answer

Importing Excel File as Dataset

This might be a basic question but I couldn't get it to work. I have a dataset in Excel that I import to mathematica usingdat = Import["etcetcetc.xlsx", "Dataset", "HeaderLines"...

Asked on 01/23/2021 by indiffer

3 answer

Problem with the precision while plotting a figure

I am trying to plot eigenvalues of a 16x16 matrix.Below you can see the code. I get some errors like “precision may be lost”, and “Eigenvalues at some positions...

Asked on 01/23/2021 by sara sam

1 answer

generating torus and n-torus knots in mathematica

I am wondering if it's possible to either algorithmically generate or access a built in database of n-torus knots in Mathematica? If not, are there any known databases or algorithms...

Asked on 01/23/2021

0 answer

What is the best way to color alternative rows but by values in a particular column of a dataset?

Consider the following dataset as an example (the actual dataset is very large and has more columns so I am looking for an efficient method):dataset=Dataset@{<|"Order Date" -> DateObject[{2020, 8,...

Asked on 01/23/2021

1 answer

Speed up a differential equation solution + parameter integration + parameter maximization

The problem I am trying to solve can be described as a maximization of an integral of the solution of a differential equation. A MWE isClearAll["Global`*"]$Assumptions = a...

Asked on 01/23/2021 by Nicola

2 answer

Translating Histogram

SeedRandom[1];RandomVariate[NormalDistribution[], 100];Histogram[%, Automatic, "Probability"]The above code produces a histogram like I want to translate the figure by say ${1,1}$ as follows:...

Asked on 01/23/2021

3 answer

How to efficiently upsample a greyscale image to generate a representative binary image

I want to create binary images by upsampling a series of greyscale images (192 x 144 resolution) by a factor of 10 with the new pixel values being a pseudorandom...

Asked on 01/23/2021

2 answer

DSolve—different solutions for same set of equations using different symbols?

I happen to find that DSolve can give different solutions, even a different number of solutions, for a set of differential equations just by making a change in the symbols...

Asked on 01/23/2021 by Enter

3 answer

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