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Mathematica : Recent Questions and Answers (Page 66)

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

How to modify a plotted graphic

I have a set of data points which I fitted using the Mayadas-Shatzke model and then I plotted the fit. My code is:f[d] = rho/(1 - (3/2) alfa[l, g,...

Asked on 06/29/2021 by Mario Papace

0 answer

Numerical integration involving divergence

I was just trying to perform the following numerical integrationNIntegrate[1/(x - 5)^2, {x, 0, 10}]The problem I am facing is the divergence at x = 5. If anyone...

Asked on 06/29/2021

0 answer

Understanding the profiler: Is pattern matching/de-structuring expensive?

I was profiling some code and I am trying to understand what the results mean. Suppose we have the very idiomatic,f[t_, s_] := t - sTable[f[i, j], {i, 1000},...

Asked on 06/29/2021 by ITA

0 answer

Manipulate InteractiveTradingChart or lazy Manipulate

Back in 2012, it seems that something like Manipulate[InteractiveTradingChart[ticker], {ticker, {"AMZN", "GOOGL"}}] worked fine. Mathematica 12.2 however is not able to handle this anymore and seems to get stuck...

Asked on 06/29/2021

1 answer

(Non)LinearModelFit hangs on "trivial" linear fit (Fit succeeds)

A simplified version of my function and a simplified subset of my data (real data also has weights, if that matters, but I tested both with and without those):myfunc[x_,...

Asked on 06/29/2021 by Effervescenza Naturale

1 answer

PeriodicBoundaryConditions misses points with coarse mesh?

EDIT: I posted a question that gives a simpler demonstration of this problem. I'm noticing that some boundary points are "missed" by PeriodicBoundaryCondition in the case below. This...

Asked on 06/28/2021

0 answer

What are the most common pitfalls awaiting new users?

As you may already know, Mathematica is a wonderful piece of software.However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be...

Asked on 06/28/2021 by Dr. belisarius

37 answer

Mathematica 12.1 trial version, very slow to evaluate a property in multiple pictures

I am a new mathematica user. I am using the following code to measure the internal rectangle width in some images. When I run mathematica for $1$ image, it...

Asked on 06/28/2021 by Hussain-Alqatari

0 answer

Solve a system of complex equations and plot the solution

I'm trying to solve a system of 2 equations with an unknown real parameter k0, the solution is complex. then I want to plot the obtained solution function of k0:...

Asked on 06/28/2021 by ridha

0 answer

How can I use Tally in my code?

I a computing the eigenvalues and eigenfunctions of a Laplacian on a unit square. I have written it as follows:{ℒ, ℬ} = {-Laplacian[u[x, y], {x, y}],DirichletCondition[u[x, y] == 0,...

Asked on 06/28/2021

1 answer

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