1.9 Thursday, March 18, 2021

1.9.1 Top new questions this week
1.9.2 Greatest hits from previous weeks
1.9.3 Can you answer these questions?

1.9.1 Top new questions this week

Why am I getting that \(0.999999999999988 \geq 1.0\) is True?
Can we make an "Outerable" Attribute?
How to fit a curve in a picture with an equation?
Bug with Json payload with diacritics for HTTPRequest
How to plot a "main effect" plot?
generating tuples of ones and zeroes with a fixed number of ones
How to add an attractive potential (migration term) named component to Mass Transport PDE

Why am I getting that \(0.999999999999988 \geq 1.0\) is True?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241791

I am getting these results:

asked by Craig Carter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12461 20 votes

answered by Chip Hurst https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4346 23 votes

Can we make an "Outerable" Attribute?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241712

We can declare a function to have the Listable Attribute so that it automatically threads over lists in a particular way. For functions of multiple arguments it ...

asked by Tanner Legvold https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=68925 14 votes

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 8 votes

How to fit a curve in a picture with an equation?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241686

For a curve taken from a picture, is there any method to fit it with an equation if it appears to be some standard curve? For example, in the following picture, the curve looks like an ellipse or a ...

asked by Nobody https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=66106 10 votes

answered by mikado https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36788 9 votes

Bug with Json payload with diacritics for HTTPRequest

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241573

Working in the creations of APIs with Mathematica 12.2, I got this problem with diacritics when sending JSON data. Here is a toy code using httpbin.

asked by Murta https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2266 10 votes

answered by Kuba https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5478 8 votes

How to plot a "main effect" plot?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241876

I’m trying to make a "main effect" type chart but I haven’t found a way to do it in Mathematica. The main effect plots are the graphs plotting the means for each value of a categorical ...

asked by ALEXANDRE ARARIPE https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=77894 7 votes

answered by MassDefect https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42264 11 votes

generating tuples of ones and zeroes with a fixed number of ones

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241943

I would like to generate all the tuples of ones and zeros of a given length and with a given number of ones without generating all the possible tuples, which is impossible for tuples of large enough ...

asked by EGME https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53849 6 votes

answered by Roman https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=26598 10 votes

How to add an attractive potential (migration term) named component to Mass Transport PDE

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241642

Wolfram Mathematica 12.2 now features "Named Partial Differential Equation Terms"

For specific physics fields, relevant PDE terms have been packaged as components and augmented with ...

asked by rhermans https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10397 6 votes

answered by Tim Laska https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61809 4 votes

1.9.2 Greatest hits from previous weeks

Plotting the frequency spectrum of a data series using Fourier
Is there something like DensityPlot3D to visualize atomic orbitals?
xkcd-style Plots
Generate a Unit Circle Trigonometry
Calculate the 2D Fourier transform of an Image
How can I plot implicit equations?
Oak Island, extending the "Alignment", possible Great Circle?

Plotting the frequency spectrum of a data series using Fourier

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=18082

testData = Table[N@Sin[500 x], {x, 0, 100}]; 
ListLinePlot[Abs[Fourier[testData]], PlotRange -> Full]

Gives me Which I do not expect because the Fourier ...

asked by C. E. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=731 14 votes

answered by KennyColnago https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=3246 16 votes

Is there something like DensityPlot3D to visualize atomic orbitals?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=32378

I’m visualizing some hydrogen like atomic orbitals. For looking at plane slices of the probability density, the DensityPlot function works well, and with something ...

asked by Peeter Joot https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10 45 votes

answered by xslittlegrass https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1364 25 votes

xkcd-style Plots

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=11350

I received an email to which I wanted to respond with a xkcd-style graph, but I couldn’t manage it. Everything I drew looked perfect, and I don’t have enough command over ...

asked by Amatya https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2039 622 votes

answered by Simon Woods https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=862 483 votes

Generate a Unit Circle Trigonometry

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=2456

Struggling often with Trigonometry I would like to have some code to generate this Unit Circle Trigonometry. Would be of great help when I need to transform some data :

asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 18 votes

answered by Mark McClure https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36 32 votes

Calculate the 2D Fourier transform of an Image

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=29203

I am new to Mathematica, and using version 8.0.

I would like to calculate the 2D Fourier Transform of an Image with Mathematica and plot the magnitude and phase ...

asked by user8727 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8727 17 votes

answered by Nasser https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70 33 votes

How can I plot implicit equations?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=34668

If you enter the following into Wolfram Alpha, you get nice graphs:

graph 4 x^4 + y^2 = 2 

How do you do this in Mathmatica? I realize that these are not ...

asked by Rollie https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10174 39 votes

answered by Timothy Wofford https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9391 40 votes

Oak Island, extending the "Alignment", possible Great Circle?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=235815

During these days of COVID, I indulged in the guilty pleasure of watching The Curse of Oak Island - Season 8, Episode 4 Alignment, which viewed last night (1 Dec 2020). During the episode, some "...

asked by Jagra https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=571 13 votes

answered by Carl Lange https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57593 12 votes

1.9.3 Can you answer these questions?

ColorFunction in ListContourPlot3D raising error when using more than one argument
Autocomplete file argument for custom function
Reduce the time to find six integer numbers so that the angle of two vectors equal to Pi/6

ColorFunction in ListContourPlot3D raising error when using more than one argument

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241851

The documentation of ColorFunction states that in ListContourPlot3D your chosen function gets the arguments ...

asked by Fidel I. Schaposnik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=45839 1 vote

Autocomplete file argument for custom function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241842

When typing Importin a notebook Mathematica suggests to autocomplete the file path you want to enter or choose a file using the GUI. Is there a way to let a ...

asked by Gert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27889 1 vote

Reduce the time to find six integer numbers so that the angle of two vectors equal to Pi/6

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241633

I am trying to find six integer numbers a, b, c, x, y, z so that the angle of two vector {a, b, c ...

asked by minhthien_2016 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5320 1 vote

answered by Daniel Huber https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=46318 0 votes