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A problem with ParametricPlot

I have a problem with rendering d3 (blue color)), at the points of intersection of the red red curve it makes vertical blue stripes, how do I fix it? Picture: https://i.stack.imgur.com/E0ztC.png ...
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0 votes
0 answers
20 views

VideoJoin changes phone videos from portrait to landscape

After using VideoJoin on two phone videos, the aspect ratio changes from portrait to landscape. How can I keep the portrait mode?
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  • 250
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1 answer
47 views

Reduce or Limit to have positive value!

I would like to see where this function is positive ??!! Reduce[{Tanh[x]/Sqrt[-1 + Tanh[x]^2] > 0}, x, Reals] thank you.
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2 votes
1 answer
44 views

Draw phase line associated to slope field

I have an autonoous differential equation dx/dt = x(1-x) dxdt[x_] := x*(1 - x) I plotted the slope field with a few solutions (left) and the constant solutions (...
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25 views

Execute wolfram command from java & j/link along with set of variables

I have been trying to execute some expression/formula which may have multiple variable, and I want to set values(like how we do on kernel command tool). We are using J/Link to connect kernel from java....
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  • 1
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0 answers
19 views

Use of Part alters line colours in Plot

I stumbled upon some odd behaviour in Plot that does not really make sense to me. I stumbled on it with a more complicated scenario, but a distilled demo is below. ...
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4 votes
1 answer
83 views

Problem with Spectrogram

Some time ago I wrote a program to analyse a short segment of music and plot as a spectrogram in Mathematica. It allows one to find the notes in a weird chord for example. The example below is from ...
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3 votes
1 answer
79 views

FourierCosTransform bug?

FourierCosTransform[Cos[(k + p) z], z, q] gives correct result ...
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0 votes
1 answer
30 views

3d Contour Plotting

I would like to plot three 3D-contour plots in the region $x,y,z >=0$ and $x+y+z<1.$ The functions which I would like to plot are as follows ...
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  • 115
2 votes
0 answers
20 views

How to turn off File Browser prompt?

Is there a way to turn off this feature? It is very slow and totally unnecessary for me. I have tried to look for a setting in preferences but I couldn't find the right box to untick.
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1 vote
1 answer
165 views

Is it possible to separate two signals in Mathematica?

I have asignal and I would like to decompose it into two.. this is the datasetTot of both signals ListPlot[datasetTot, PlotStyle -> {Black, Black}] I know ...
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0 votes
0 answers
23 views

How can I change fractions as tick labels with real numbers?

When using HorizontalGauge or VerticalGauge the scale divisions are frequently labels with fractions (1/5, 2/5) etc., which looks terrible and is hard to read. I have not found a way to force labels ...
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1 vote
1 answer
56 views

How to make warning and errors messages on console print in RED? so easy to see them?

When I run large computation with 1,000's of iterations, then later look at the console looking for any errors or warnings generated, it is hard to locate them scrolling up and down, as the color of ...
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0 answers
44 views

Combine two contour plots with region function in one with common bar legend

I have the following two contour plots ...
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1 answer
49 views

How to plot 3D spherical graph using x y data?

I have a problem in which the temperature is given at different radius for spherical ball. The temperature does not vary in theta and phi direction. The 2D representation is shown below: The radius ...
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  • 1
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1 answer
47 views

gen 2 and 3 surface generation [closed]

Is there someone who uses Mathematica, and can help me to generate these images for a project? We don't have free access from the university and I can't find other free generators to be able to ...
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5 votes
4 answers
168 views

Modify one list according to degeneracies of another

I have two lists, each with four elements, let's say listA = {0.3, 0.6, 0.6, 0.9} listB = {0.1, 0.2, 0.3, 0.4} Notice that the second and third element of ...
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2 votes
2 answers
68 views

Piecewise based on the length of the list

I want to create a piecewise function that depends on the length of the list. Let's say I have a list, and a corresponding piecewise function: ...
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  • 703
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0 answers
46 views

Syntax for parallel processing

I have a Do[] loop that references a few global variables but doesn't modify anything. The only output is appending data to an external file. The order of appending doesn't matter, I just can't have ...
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2 votes
1 answer
74 views

Plotting, Integrating two variable function with cross-restricted domain

Hello, I have two problems. the first is plotting 3D function, the domain is "0<x<y<1". (I could find examples like integrating function with domain 0<x<1, 0<y<1, but I ...
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  • 135
4 votes
0 answers
78 views

FEM: modelling 2D flow under periodic forcing

Despite many examples of periodic boundary conditions being presented, it remains difficult to obtain a periodic solution. Let us consider a simple example of a flow in a two-dimensional channel under ...
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0 votes
1 answer
60 views

Custom frame ticks in listplot

i am trying to ListPlot some data extracted from the approximation of a complicated function. The minimal code is the following ...
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3 votes
1 answer
71 views

How can I remove the redundant generators in PermutationGroup?

Consider: ...
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  • 23.3k
1 vote
1 answer
116 views

Integral of orthogonal Bessel functions

This is the basic form of the problem i am solving. The main difference with the integral on the photo and my example is that i have my integral defined from b to c instead of 0 to a, and Bessel ...
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3 votes
1 answer
69 views

Imported macOS screenshots display differently

When I take a screenshot in macOS (cmd-shift-4) and then import into a notebook, the colors tend to look washed out. Can anyone reproduce this behavior, and is there a workaround? For example let's ...
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0 votes
0 answers
45 views

NSolve just spits out the input functions

I was trying to solve 3 equations with 3 variables with NSolve, however, NSolve didn't really do anything but spitting out the ...
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  • 13
0 votes
0 answers
27 views

Notation package problem [duplicate]

I am using Mathematica 12.3.1 on Windows 10. I am trying to load the Notation package: Needs["Notation`"] and I get the following: It seems the package ...
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  • 593
3 votes
1 answer
47 views

GraphDiameter for molecule graphs error [closed]

I was looking into GraphDiameter for molecules and ended up on this [page][1], which gives examples in various modalities to calculate the graph diameter for this molecule.'CC(C)C(C(=O)NC(=O)C1CCCN1C(=...
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  • 515
0 votes
0 answers
46 views

Integral with triangular functions in exponential and numerator

I am trying to find the solution of an integral with a triangular function in the numerator and in an exponential, but after an hour Mathematica has not given me an answer. I wondered if there is a ...
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  • 131
0 votes
1 answer
44 views

How to write divided differences in Mathematica? [closed]

The question is : use newton's interpolatory divided difference formula or to construct interpolating poly of degree one , two and three for the following data: f(8.4)=f(8.1)=16.944 ,f(8.3)=17.564 ,f(...
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3 votes
1 answer
166 views

Geogebra spline command in Mathematica

Spline(pts, order, Weight Function) Creates a spline with given order through all points. The weight function says what should be the difference of t values for point $P_i$ and $P_{(i+1)}$ given ...
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  • 4,910
3 votes
3 answers
89 views

How to make a table with three columns?

I am trying to make a table with three columns containing the values of p, q and W. I have written the following code which gives multiple columns. I have tried Flattening the table. but I could not ...
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  • 319
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0 answers
52 views

How do I switch around the axes?

I imported a csv file (in the long format) in a nested list format where each nested list is a row in the data frame I used ListPlot3D but I want the x & y axes to start from 0 and 0 (I want to ...
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  • 1
1 vote
0 answers
114 views

What's the command for high approximation up to 50 digits?

I am trying to find the numerical value of $\displaystyle \sum_{n=1}^\infty \frac{e^{-n^2/\pi^2}}{n^2}$ up to 50 digits. I used ...
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2 votes
2 answers
103 views

A problem of nonlinear multi-objective optimization

I have two variables x1 and x2 and I use them to calculate 4 metrics y1,y2,y3, and y4. now I want to solve for the value of x1 and x2 so that these four metrics are as large as possible. Can anyone ...
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5 votes
4 answers
296 views

Finding the periodicity (or wavelength) in approximately periodic data irregularly sampled

I have irregularly sampled data that looks as in the picture. Is there a function in Mathematica that allows me to find an approximate or average period or wavelength? I know beforehand that the data ...
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  • 567
5 votes
1 answer
357 views

How to use PlusMinus properly?

As an easy exercise, I would like to define a function $$f(x)=\pm x$$ and be able to ListPlot the function for some discrete values. Here is what I tried ...
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2 votes
2 answers
86 views

Definite Integral of Probability Distributions

Suppose at each value of $x$ I define a normal distribution dist[x_] := NormalDistribution[Sin[4 x], Cos[10 x]^2] Now I want to find the distribution $$ \mathcal{D}...
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0 answers
52 views

Useless and incorrect result of AsymptoticIntegrate

In version 13 on Windows 10 I try to find asymptotic of the integral used in potential theory ...
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  • 16.7k
0 votes
0 answers
41 views

How to mimic Expand with Thread?

I want to mimic Expand[(a + b) (c + d)] with Thread. My attempt below does not provide the correct result: ...
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  • 1,767
1 vote
0 answers
41 views

Looking for an appropriate method of NDSolve for dynamical system

I am dealing with the numerical solutions of a variety of dynamical systems with integrals of motion. As the example, let me consider the Kuramoto model, which equations of motion are ...
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1 vote
0 answers
46 views

How to take a derivative of a function with respect to another function inside the function?

I have these two equations: ...
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1 vote
0 answers
24 views

WolframClient output convert to python complex array

I encountered the following issue with WolframClient. I have a my.function file which contains some function that takes some ...
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  • 503
2 votes
0 answers
85 views

Filling the space with rectangles

The problem concerns filling the matrix m x n with rectangles. ...
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  • 959
13 votes
10 answers
3k views

Fastest way to generate {{a,a},{a,b},{a,c},{b,b},{b,c},{c,c}} from {a,b,c}

What is the fastest way to generate {{a,a},{a,b},{a,c},{b,b},{b,c},{c,c}} from l={a,b,c}? I've tried ...
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  • 295
0 votes
0 answers
28 views

Inline labels in a plot

Not quite sure if this is even possible, but I assume this is the right place to ask. In Python, as discussed on this question, it is possible to add the corresponding labels directly over each line, ...
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2 votes
1 answer
163 views

Goodness of fit [closed]

I want to evaluate the goodness of two sets or more fitting parameters, using Rsquared and RMSE (root mean square error), Then how to code?) ...
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  • 41
14 votes
1 answer
208 views

Which Mathematica versions have changed WolframLibraryVersion?

A LibraryLink library compiled with headers having a certain WolframLibraryVersion will not work with Mathematica versions that support only earlier ...
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  • 224k
7 votes
2 answers
223 views

Scalloped edges to Plot3D with Disc domain

I'm running into problems with a weird edges to my Plot3D with a Disc domain. MWE: ...
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  • 73
1 vote
1 answer
41 views

Boolean constraint in an interval for FindMinimum

I have a function with a large number of variables that I am trying to minimize subject to some constraints, but for simplicity let us say that it only has two variables, f[x, y]. The constraint is ...
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  • 121

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