All Questions

I want to write a code that checks each element of a given matrix C2 and in case they are't 0 or 1 , replaces them with 1. My code is so far as follows and the code ...

I'd like to minimize a pretty complicated function $f(x, y, z)$ with NMinimize, however for certain values of the arguments $f$ becomes complex valued, and my ...

I am handling a huge set of data and I am trying to optimize my code. I have very large expressions to expand and simplify and I've seen that converting the expressions to ByteArrays improves a lot ...

Interpolation can make an InterpolatingFunction periodic with the option ...

I have this Data set into Mathematica as such: ...

There are a lot of questions already on Ticks. However I did not find a better way to handle ticks place, size etc. I have a simple example where I want have some ...

With ToeplitzMatrix we can create a Toeplitz matrix from a list of values. I have a question going in the opposite direction, namely, how to efficiently check if a ...

I have an expression where there are terms like a ** (b*Tr[a ** b]) and I want to simplify it to something like ...

(This is part 2 of my earlier question, Can I overload Part for specific heads (a la overloaded array subscripting)?, which was well-answered as asked.) Overview: My goal is to create a custom object -...

How to ingest Mathematica / WL benchmark results posted at Mathematica StackExchange (MSE), like the ones posted here ? Assumptions: There are multiple answers with benchmarks posted The benchmark ...

If I try to convert a tensor object to a CTensor DefTensor[F[i, j], M, Antisymmetric[{i, j}]]; Fc = ToCTensor[F, {ch, ch}] The output is ...

I need to find a function to fit an histogram with "Probability" setting: Histogram[data,Automatic,"Probability"]. Thanks

I would like to draw a vector field and let the magnitude of the vectors change over time (t) using the Manipulate function. The direction of the vectors will be static. ...

Starting from the following list: list = {{a, b, c}, {d, e, f}, {g, h, i}, {b, c, d}, {c, a, m}, {c, d, n}}; I want to ...

I'm trying to contract two tensors that I made in xAct to get a simple result. First I set up a Cartesian space ...

Consider If statement If[1 == 2, 1] which is false and so does not evaluate, and If statement If[2 == 2, 2] which is true ...

I'm very new to Mathematica and I have started to use it since I have been tackling some Physics related problems(I'm an engineer by training). Specifically, I'm dealing with Master Equations and one ...

Lets say I have a function parameterized by a number of variables. As a simple example $$F(x,y) = ax^2 +by^2-cxy+1$$ I want to find some set of values (doesnt really matter what they are) for the ...

Does anybody know how to include standard GridLines in SciDraw? I found this but it doesn´t really answer the question. Here my minimal example reproducing the problem: ...

I'm trying to implement a Friedmann-Lemaître-Robertson-Walker metric + a perturbation in a scalar-vector-tensor split in mathematica, using xAct. The S-V-T decomposition comes with some rules for the ...

I need to calculate the seismic moment of an earthquake data, but I don't know how the FFT is applied in some data, my data is a plain text that I must import it to Mathematica ...

I would like to give some context: I need to analyse many data sets stored in files using different kind of analyses. To keep track I like to tag each results of my analysis for example like ...

I would like to compute the double dot product between a 2nd and 4th rank tensor in mathematica $A_{kl}A_{ijkl}$ $if \, A_{kl}=\begin{pmatrix} 1& 0 & 0\\ 0 & 1 & 0\\ 0&0 & 1 \...

I searched already a lot about indexed Variables, and it tends to be the most applicable way to use tensor notation. But I am having a hard time to solve for undefined indexed variables: Here my ...

I wanna create a background 60*100 matrix and insert inside it the calculated values for example data={{1, 60.51}, {2, 24.5115}, {3, 9.92919}, {4, 4.02214}, {5, 1.6293}, {6, 0.66}}. So the rest ...

Consider some dataset. I use the following code to interpolate it: ...

I want to draw the Fibonaccinumbers from 16 -116. ...

I am teaching a basic introduction to normal curves, and the textbook introduces the topic with the idea of rolling five dice and recording the sum. Do this many times and create a histogram of the ...

I found it's tricky to colorize a sub-expression of an expression that changes to a different expression when it is evaluated. For example, if I replace s with ...

I have the following complex expression ...

So I'm trying to find the symbolic expression of the group delay of this complex function: TFilter=(K1 wp1^2)/(-w^2 + (i*w*wp1)/Q1 + wp1^2) My attempt was to first ...

I have this expression: TFilter1 = -(7.5438*10^8/(6.34731*10^8 + 48270.2 s + s^2)) where s is a complex variable give by $s = ...

If the first equation is 2x+y=152, and the second is x+2y=100, and it is a fact that both variables are whole numbers and x is larger than y, what is the value of x?

I am quite new to Mathematica and would like to know how to compute the symmetric part of a 4th order tensor $A_{ijkl}$. Since there are 4 indices (i,j,k,l), we have 4!=24 permutations. The symmetric ...

I have a very long list of data. Below is a simplified version data = {junk1, textHeader, moveTo, text, moveTo, text, junk2, textHeader, moveTo, text, junk3} I ...

The problem arises as value of $\gamma_0$ is very high (on the order of 10^13), whereupon $\exp (-\gamma_0\,h_a^2)$ is becoming very small and ultimately zero. Can anyone help me to evaluate this ...

An astroid is a particular mathematical curve: a hypocycloid with four cusps. Given a lot of data points I'm trying to fit such a curve to the data. As an astroid is also an algebraic curve of grade 6 ...

I am trying to beautify a contour plot where I have a wide data range. But still I want to use a linear scale for axis. But due to large range of the data, the most of the contours are restricted to a ...

I am having an issue where the kernel spontaneously quits, deep in a long code that I have used for quite some time without this issue. I've tracked it down to an assignment of the form: a[[All, All, ...

We are searching in our group for closed forms of derivatives of hypergeometric functions. This leads to expressions like $\sum\limits_{m=2}^\infty \frac{z^m\Gamma[m-1/2]H_m}{2m^2\sqrt{\pi}\Gamma[m]}$ ...

I am trying to plot the first derivative of $H^{(1)}_3 (ix)$ with respect to its argument $ix$, where $H^{(1)}_3 (ix)$ is the Hankel function of the first kind with order $3$, $x \in \mathbb{R}$ is a ...

Lets say I have below list of elements in which summation of all elements need to be done. ...

Lossless movie export. How do I do that ? Or how do I export such that the color doesn't change. AVI makes changes the color and mov changes resolution and color. If you export a still image (in BMP ...

I am a newbie Mathematica user I wanted to know, using brute force, how many non empty triplets $\{A_1,A_2,A_3\}$ of subsets of $$AA=\{1,2,3,4,5,6,7,8,9,10\}$$ satisfy the conditions $A_1\cup A_2\cup ...

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There is a code for a revolution of Koch Snowflake I just want to export it as an obj file (or any other 3D format) ...

I have a point object, let's say A = Point[{Cos[2 Pi/5], Sin[2 Pi/5]}] . How do I get the $x$ and $y$ coordinates of the point in separate variables?

I'm actually new to Mathematica I have been using sympy and sometimes cadabra to do calculations for a while though, I was wondering if there is an easy way to compute arbitrary expressions simplified ...

t = Table[i1 + i2 i3, {i1, 2}, {i2, 3}, {i3, 2}] ArrayDepth[t] How to use "pipe operator" in Mathematica Version 11.0? In R, with library ...

I am trying to solve the following equation numerically for $\mu$, but I'd like to keep $T$ and $n_e$ as parameters for easier plots. $$ n_e = \frac{1}{\pi^2}\int_0^\infty dp\, p^2\frac{\sinh \left(\...