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use of ? when not meaning help

Trying desperately to understand Michael Trott's Happy Harmonic 2017! post: https://community.wolfram.com/groups/-/m/t/2858495 What does the use of ? in ?t1, ?t2 and ? = (t21 - t12)...mean? The ...
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• 113
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How to render text at a specific height in pixels?

I would like a way to create an image of text that is a specific height in pixels. In the following code, the text is sized to fit in the specified raster. Since there are five letters, we expect each ...
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1 vote
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1.First, I defined the spherical harmonic function and converted it to Cartesian coordinates. ...
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Difference between direct plotting and using function to plot

Edit: Syed's and Lukas's suggestions both solve this problem, thank you very much. I'm having some issues with a set of plots I'm making (it's to do with Penrose diagrams, but that's probably not of ...
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72 views

Finding positions of sublists matching a criterion

I want to find in a list of couples the positions of the ones with consecutive items: ...
69 views

I am trying to solve ODE using NDSolve mathematica [closed]

I will upload my code again after correcting Mista
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How do I launch a kernel under Rosetta when I'm running the FrontEnd natively on Apple Silicon?

It's easy to launch a frontend under Rosetta, which will naturally start its kernels under Rosetta as well. For example, you can check a box in the Get Info window of Mathematica in the Finder, among ...
• 13.9k
72 views

What's up with BarChart?

Mathematica version 13.2.1.0 macOS version Ventura 13.2.1 I began having odd behavior with BarChart. I restarted Mathematica. The attached image demonstrates the ...
• 14.2k
19 views

FinancialIndicator does not work in InteractiveTradingChart with list form of stock data

I want to add some FinancialIndicator on InteractiveTradingChart when stock data is written in the form of list, ...
62 views

Evaluating Fourier transform in mathematica

I am trying to evaluate the expression FourierTransform[[m (a^2 - t^2 - I g t)]^-1, t, ω] in Mathematica. It gives me the error message that "Syntax: "[m(...
20 views

manipulating animation

The following code defines a function P[...,X,Y,...] and plots its (random) points with coordinates (X,Y) on a plane as an animation. The number of points is determined by the variable "particles&...
61 views

How to reproduce such Graphics3D? [duplicate]

The questioner asked how to reproduce a graphic that very closely resembled this graphic: Shortly afterwards, my browser crashed. meta.stackexchange.com states that they do not plan on supplying a &...
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Handling singularities like (x-y) in the denominator while evaluating double integrals

I have to solve an Integral of the following type ...
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How to inverse a function?

I have a function:D_j\left(\beta_j,B\right)=B\left(\left(\frac{1}{4}-\frac{\beta_j}{B}\right)\left( 1-\left(1- e^{-30\beta_j/B} \right)^8\right)+\frac{2/B}{3+1/B^2}\left(1- e^{-30\beta_j/B} \right)^...
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Plotting natural log equation in 3D plane

I have a natural log equation from excel and I need to plot it on 3D plane at a particular z(for example, z=1) I would expect a vertical plane, but what I am getting is a horizontal plane. This is ...
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182 views

Sorting a List Based on a Given Order

Suppose I have the following input: input={{1, 2, 3}, {-2, 4, 6}, {-1, 3, 6}} How can I sort it according to this list: ...
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Using HTTPRequest to Obtain an Access Code

I am trying to create a Mathematica equivalent to the following code: ...
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