All Questions

I'm looking for the fastest way to access the mesh cell (i.e. polygon) in a Region that intersects a Line in 3D. For example, <...

I want to implement something like the following and estimate its parameters. this has state variable being subject to DiscreteMarkovProcess. For estimating,this process requires estimating of Matrix, ...

OEIS A036301 is a sequence of numbers $ n $ such that the sum of the even digits of $ n $ equals the sum of the odd digits of $ n $. Let's call these numbers "balanced". Given an input positive ...

I've a question regarding "zero dots". Im using a lot of calculation in an application which i am building within mathematica. However when i use the output of solve for instant i will not have the ...

Hello, i have one .txt file of many data in two column: x(i) y(i) . . . . . . for example -.05

The constraints are H >= p(4p-1), p is prime although not necessary for this problem. From numerical tests I see the maximum to be 2p at H = 4p^2. I need to prove this. The derivative of the Floor ...

In using the HankelTransform and its inverse I find that the inverse does not lead to the initial input. I begin with r (the independent variable) in the denominator but end up with r0 (a constant) in ...

Firstly I wanted to find all the non-negative integer solutions for the following equation given the value of $k_{max}$ $$ k_1 +k_2 +k_3+k_4 = k_{max} $$ For this I use the following code:- ...

I have a function ω[k]: ...

We have a university license of Mathematica. In /usr/remote/Wolfram/Mathematica/10.3/Configuration/Licensing/mathpass on all the Debian 9 systems we have the ...

I would like to compute sum. How is it possible to compute the sum fast? May be with the help of replacing Sum with NSum or <...

I have the following code: PopupMenu[Dynamic[choose], {al, bl, cl}] and vin1 = Dynamic[choose] then, I would like to use ...

I'm trying to obtain the normal form for the Hopf bifurcation using mathematica. I was looking at the following article: downloads.hindawi.com/journals/sv/1995/581272.pdf and I´ve tried to solve (25)...

Is it possible to install the RPI version of the Wolfram Engine on the ARM instances of AWS? Otherwise WR could distribute a version of CDFPlayer for ARM, do you think they are willing to do it? That ...

I am trying to plot the following code in Mathematica, but nothing shows up. Any tips as to how I can resolve this issue? ...

When I plot these graphs separately everything is OK, but when I try to plot them simultaneously I get error. Why?

In the Virtual Book of Mathematica, there is a simple example to show how to create lists of strings by List: ...

I have created the following TemplateBox Rule. ...

I want to create a function which only accepts integers. if a value other than integers are given it should output zero. This is what I've tried so far. I'm trying to do some discrete time signal ...

I wrote this little function ...

I have a set of $ x $ and $ y $ data. The $ y $ data is represented in a logarithm scale and the $ x $ data is in linear scale. I have used FindPeaks function to ...

Mathematica does not give me any solution for the ODEs as follows: ...

I'm trying to optimize my code a bit, and I'm having some issues with block. Here's the block ...

I am interested in accelerating DimensionReduce using the "TSNE" method. I have a matrix with a size of 30000 * 10, and I want to reduce to 30000 * 8. But the calculation is very slow, any suggestions ...

Can I use ColorFunction in place of color in SwatchLegend or is there any way to include ...

I am trying to optimize a linearly constrained Production Function. I have three inputs and want them all to be multiples of 150. I can make all the inputs to belong to the Integer Domain but is there ...

I'm trying to find a root of the following equation $$\theta^\frac{t}{s}-\theta-\sqrt{1-p},$$ where $0<t\leq1\leq s$ and $0<p<1$. I've tried FindRoot and Reduce, but somehow they don't ...

Suppose we wish to replace the cols "b" and "c" of rows 3 to 5 in the following dataset to b and c respectively: ...

I am trying to simplify an expression and taking the real part only. However Mathematica use ages to run the command (if it is able to do so in the end). The problem is that the expression I am ...

If i create a custom input alias using Notation package's AddInputAlias. Now it appears in the list generated by ...

I am having a problem with the FullSimplify and DiracDelta functions. When I run the following line in mathmatica: ...

I encountered a problem with the NIntegrate function while simulating a physical situation. The expression is quite messy, but it is just an integration over a polynomial so it should be possible. I ...

I have a list of data, regarding particle size and I want to get a plot of the particle size distribution. For some reasons I can plot my data into an histogram using Histogram [data, Automatic, "CDF"]...

So I would like to solve the following set of equation for $m_i$ given a set of ${M_m,N_m}$. $$ m_1 +m_2 +m_3 +m_4 =M_m \\ |m_1| +|m_2| +|m_3| +|m_4| =N_m $$ All variables are integers. Also $N_m \...

I'm currently doing some Mathematica exercises, and I'm stuck on this one task where you're supposed to plot the functions h(t)= |3-t^2|+|t-1|-t^2 , g(t)=3sin(t) in the same grap, and then find all ...

How to "Modified" Cholesky Decomposition in Mathematica? what I mean: V = L . D . Transpose[L] V is p*p(row is p,columns is p) non-negative definite matrix, D is diag[$d\small1$,$d\small2$,$d\...

I encounter a problem when computing the following equations: ...

I've been using Mathematica as a hobbyist, off and on, for some time. So while I'm by no means an expert I've used it long enough to know that what might seem obvious to me is not necessarily obvious ...

I have the following code: ListContourPlot[data,Mesh->None,ContourStyle->None, PlotLegends->Automatic, BaseStyle->Directive[Opacity[0.3]]] Due to ...

I try to solve the following system but I had the error message. ...

How should I define my functions without entering their exact expression so as to compute operations like differentiation on them? Say I have a function $f(t,x)$, which I don't want to specify. Now I ...

Sent to me by a colleague asking me for assistance (the function as is breaks): ...

I want to create a function to read or wirte windows *.ini files, so I plant to call GetPrivateProfileString and ...

When I run my CDF from CDF player for instance, I my slider controls (fast forward, play, pause, etc) are initially visible using the following line of code within my manipulate: Appearance->"Open" ...

I would like to use the same box width for two different plot. consider following example. How can I use the same box width for the second plot? ...

I have two functions $ f(n) = 1/(1+n) + b, (n \geq 0,b \geq 0) $ and $ g(n) = pn^2 + qn + r $. Assuming that I know the value of $ p, q $, and $ r $, I am trying to find a value for the constant $ b $ ...

Consider a simple plot with text: Show[Plot[x^2, {x, 0, 10}], Graphics[Text[Style["some text", Large], {4, 10}]]] You can see Mathematica's output on the left ...

I have a lot experience with traditional programming languages, but almost none with mathematica. I have data that I've transformed and saved to a file in the format {x,y,time} {x,y,time} ... ...

I am preparing a practical class of physics in which I need to justify the following text that is very extensive. But when I use StringSplit or ...

Consider the 3 following manually entered evaluations where a Set statement is brought to the Front-End by Dynamic: Obviously ...