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Mathematica : Recent Questions and Answers (Page 26)

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

FileNames becomes extremely slow when there are large number of files under a directory

I have a directory on my portable hard drive, with around 350000 files under it (there is no subdirectory, only files). I want to get all the file dirs so...

Asked on 08/27/2021

1 answer

Using NIntegrate to reproduce NProbability over joint Gaussian distribution

Consider a random vector {s,c} with a bivariate normal distribution. For a vector of positive scalars {a, ß, σz}, I'm interested in calculating (numerically) the probabilityNProbability[c < (1 -...

Asked on 08/27/2021 by OO_SE

1 answer

Twisted Bilayer Graphene Mathematica Plots

I am trying to plot band structure of twisted bilayer graphene.This is a ten bands model studied in this work reference.Everything is working fine but...

Asked on 08/27/2021

1 answer

Evaluate function at "good" points used by Plot in numerical problems

Plot function with option Mesh->All shows how mathematica evaluates function to make it most optimal for plotting. I'd like to evaluate some physical function in those points - in other...

Asked on 08/26/2021

2 answer

Can't load Classes package

This is a followup question to packages will not load. I can get SamplePackage to load by doing <<SamplePackage.m or <<SamplePackage' but I cannot get TMPClasses.m package to load,...

Asked on 08/26/2021

1 answer

How to multiply the elements of each site of tensor products to each other while using symbolic representation?

If I have, say three sites in a symbolic operator which is of the form A = a⊗1⊗c and I want it to act on another operator B = a1⊗b⊗1...

Asked on 08/26/2021 by Net

1 answer

Mathematica v 12.1.1.0 FrontEnd Autoformatting Bug (?)

I'm at my wit's end. I'm using MMA version 12.1.1.0 (for Mac), and the front end is behaving bizarrely.When I've chosen Subsection style, there are times when I'm writing...

Asked on 08/26/2021 by WAH

2 answer

Correcting error messages emitted by ListPlot

I have an assignment to use Module and in which I have to implement:The input of the program are a list of numbers and a list of stringsCheck whether every...

Asked on 08/26/2021

1 answer

How to write to a VARBINARY field using a stored procedure

Is it possible to write a binary file (e.g. an EMF) to a VARBINARY field using a stored procedure? Creating an example EMFcircle = Graphics[{Blue, Circle[{2, 0}]}, ImageSize ->...

Asked on 08/25/2021 by Chris Degnen

0 answer

Function arguments are taking way too much RAM

I have to compute a function "func" with 24 arguments. Unfortunately when I apply the arguments the RAM fills up immediately. I even change the swap size of my Linux...

Asked on 08/25/2021

2 answer

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