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How can I use the DFT to evaluate the N Fourier coefficients using Fourier[] and Table? Where (N=2^5, it is the number of ...

I have the following code: ...

I am trying to add an element to a nested list. An example of the nested list is given below: cordxy = {{{1, 2}, {3, 4}, {5, 6}}, {{7, 8}, {9, 10}, {1, 2}}} I ...

Context I have a function that depends on 3 real variables x,y and z and that is defined by a series of matrix products. The evaluation of f for a specific (x,y,z) is fast ~0.02 sec but I want to ...

In a previous version of Mathematica (maybe version 7), it was possible to use GeometricTransformation on an ArrayPlot. That ...

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I am trying to solve a first order differential equation using NDSolve. The differential equation is ...

Continuing from here, I would like to Texture lines with thickness. I tried using the normal and the binormal from ...

I am new to Mathematica and working with streamed data: ...

I want to create geometries. How to create shapes like this in Mathematica?

Can anyone help on this ? I did this ...

code for calculate parameters (https://i.stack.imgur.com/eVoi6.jpg) The value of parameters (https://i.stack.imgur.com/1O8wL.jpg)

Is there a sprintf() command (some command that takes a printf-style format string and a list of values to insert into the ...

I need to represent δ(t-t0). The hint is: In cases involving Dirac delta functions, onemay use the regularized delta function δ(t) = ε/[π(t^2 + ε^2)] approaching δ(t) in the limit ε → 0^+. But I don't ...

The right numerical value of the closed form of $\sum_{n=1}^\infty\frac{4^n H_n^2}{{2n\choose n}n^2}$ is $40.66752074791188333...$. I tried to verify this result on Mathematica using the command: <...

This question is related to my question Is there an elegant exact formula for the zeta zero counting function? on Math StackExchange. Question: Does anyone have a Mathematica implementation of the ...

I have the following vector functions: $$E=\left\langle \cos\left[\frac{\pi x}{5}\right]\sin\left[\frac{\pi y}{4}\right], \sin\left[\frac{\pi x}{5}\right]\cos\left[\frac{\pi y}{4}\right], \sin\left[\...

I would like to compute all non-isomorphic trees with n nodes efficiently. I use the following approach: I create all possible trees ( Visualizing Cayley's Formula in Mathematica) and filter the ...

I am trying to replicate the behaviour of some of the built-in operator forms (for Map, Apply etc) but struggling to understand ...

Use the DFT to evaluate the N Fourier coefficients cs of fp(t), derived by sampling the following periodic functions: (a) fp(t) = cos^2(t) and (b) fp(t) with unit cell φ(t) = rect(t) and period ∆t = 3....

I have a system of ODEs say x'(t)=2 x(t)-x(t)y(t)-3 x(t) g(t), y'(t)= y(t)-2 x(t)y(t)- x(t) g(t) with ICs x(0)= 1, y(0)=1/2, say, for t_0 <= t <= t_f, where t_0 and t_f are start and final ...

Can Anyone help I did this to get the same graph but ...

I have two lists start = {{1},{1},{1},{2},{3},{1}} end = {{1},{2},{2},{3},{3},{1}} And I want to create a Sankey diagram. Which looks something like So, ...

If I want to compute Double Integral on a given region(See attached Picture) How can I input this on Wolfram Alpha Notebook

I have 42 coupled differential equations (6 of them are PDE's). My system has 6 objects and an object have 7 coupled equations. Since these objects are interacting with each other, their coupled ...

Does anyone know a better way get the output generated by this code: Table[Table[{b-a,b},{b,7}]{a,7}]

Consider the following operator defined over unit vectors of $\mathbb{R}^3$: $$R(u,v) = (u\cdot v)I_3 + hat(u\times v) + \dfrac{(u\times v)\otimes (u\times v)}{1+u\cdot v}$$ ...

I am working on creating a demonstration and came across an instance where my code works fine on my machine locally but breaks down when deployed to the cloud (so that it can be publicly accessed). I ...

I have the following function: T[r_, theta_] := Cos[theta*\[Pi]/180]*r^2 which I would like to evaluate using predefined values of r from a function which I define ...

First of all I want to create a list of evenly spaceed points in a cubic region in $\mathbb{R}^3$. Then I want to keep the points in this list which satisfy a certain condition, i.e. a function that ...

Why doesn't the following expression evaluate to zero? In[1]:=Mod[1.2, 0.2] Out[1]=0.2 Edit: This is what I wanted to do: ...

I found a strange behavior in Round. If we try: ToString[Round[4.811, 0.01], InputForm] we get: 4.8100000000000005 When I expected 4.81 In order to get ...

Why does Sin[2.0 Pi] evaluate to -2.44929 x 10^-16 and not 0.0?

I am planning to purchase a new computer especially to use for Mathematica programming purposes. Currently, I have MMA v.11. Could someone with Mathematica v.12 run the following benchmarking and ...

I'm losing my mind. Please tell me my laptop is doing weird things and not me. Or do I need to get committed someplace? ...

I use: ...

I need to plot the following functional with accuracy: $$ I(x,s) =\int_0^\infty\mathrm dy \frac{F(x + \mathrm iy,s) − F(x −\mathrm iy,s)}{\mathrm e^{2πy}-1}, $$ Where $ F(z,s) = \dfrac{1}{z^s\Gamma(\...

RegionPlot3D incorrectly plots regions defined by memoized functions. A memoizer: ...

Need to fill the region between two data sets with colored hatched (\ || //) lines in LogLog scale. I use Mathematica 11.1. Apparently HatchFilling nor PatternFilling are available.

I use mathematica for typing Physics and other notes. For important equations, I prefer to put a box around them. To do so I use either: Insert-> Typesetting -> Add Frame from the menubar ...

The built-in AppellF1 function seems generally useless. For example, AppellF1[3/4, 1/2, 1/2, 7/4, (7 + 4 Sqrt[3]), (7 - 4 Sqrt[3])] hangs indefinitely on my system....

It is not very surprising that plotting a PackedArray is faster to plot than a list of pairs (date, value), nonetheless the plotting time may be prohibitive with <...

I draw a three-dimensional graphic with the use of the command "Graphics3D". The graphic includs lots of solid and dashed lines. When exporting the graphic into the EPS format, the final ...

I would like to plot some data with SmoothHistogram3D, but one of the axis is date, and I would like the ticks to reflect that: ...

I'm attempting to constrain the values of some of the model fit variables to a list of defined numbers. Here are a sample dataset and model. ...

Consider the following example: ...

I have the following equation which I want to solve: $$ I_D = [Li_2(-e^{V_D-I_D})-Li_{2}(e^{I_D})] $$ Here $Li_2(x)$ is the PolyLog function of order $2$. Is there a way to solve this equation ...

How can I take the image data of the area around a max? ...

In Mathematica, customizing Sections, Subsections, Titles and so on, can be done with Format > Style > .... Changing the background color of a style is one of the things you can do. Here is an example ...

Is there a Mathematica implementation/package that displays all topological sorts (i.e. linear extensions) of a partial order using labelled Hasse diagrams (nodes labeled with the appropriate ...