0
votes
0answers
4 views

TransformedRegion and RegionPlot

I encountered an issue using RegionPlot together with rotated regions. Notice how as long as one drags a slider in this simple ...
4
votes
0answers
25 views

RegionPlot Failing on my System

I am running Mathematica 10.4.1.0 on a MacBook Pro OSX 10.11.5. I opened the documentation for TransformedRegion, went to this example in Scope, Formula Regions. When I open this particular ...
0
votes
1answer
26 views

Counting flops to compare to operations

I know there is a Timing approach, but I am wondering if there is a Mathematica command that will count the number of flops (floating point operations). For example, if I do: ...
1
vote
1answer
45 views

Neat way to apply Newton's Method [duplicate]

What are different and elegant ways of applying Newtons method to $f(x)=x^3-x-1$? Newton's Method is: $x_{n+1}=x_n-\frac{f(x_n)}{f'(x_n)}$ Being a beginner I can't really figure out how to create ...
0
votes
1answer
33 views

Refresh plot during heavy calculations

I have some heavy calculations with generates huge list of {x,y} points. I want to dynamically update plot during calculations. Or update it after calculations complete. I cant use simple Dynamic@Plot,...
0
votes
1answer
34 views

Plot Dirac Delta function

I would like to know how to plot the Dirac Delta result of the Fourier transform of the following typical expression ...
1
vote
2answers
39 views

Dividing a list into more, smaller, lists

If I have the list {3,5,4,2}, is there a way to divide this list into smaller lists of the form {3},{5},{4},{2}?
3
votes
1answer
26 views

How to wait a Cell in a Notebook to be executed until another Notebook's Cell expressions executed?

I have two Notebooks and I call the second Notebook from the main but main Notebook's expressions continue executing. I want them to wait until the second Notebook's expressions execution is finished! ...
0
votes
0answers
39 views

Solving equation containing integration

I am struggling with solving an equation which is not simple but nothing particularly sophisticated either. I get the mistake like ...
1
vote
1answer
111 views

My code uses `ClebschGordan` but `Mathematica` is using `ThreeJSymbol`

I'm using a function that calculate CG coefficients with the function ClebschGordan but instead, I've got the following error because Mathematica is using ...
1
vote
1answer
22 views

Nested lists replacing of elements

I have a list of the form SpecialCycle12={{{1, 2, 0, 0, 0, 0, 0}}, {{3, 2, 1, 0, 0, 0, 0}}}` And the list ...
0
votes
1answer
45 views

Plotting with Logarithmic Scale

Perhaps this is trivial but I would like to plot the following function: \begin{equation} p(t)=e^{\left( -\frac{d}{1-c}\right)\left[ W_0\left[B(1+x/r)^{1/d}\right]-W_0[B] \right]} \end{equation} ...
2
votes
1answer
75 views

How can I get exact solutions of this system of equations?

I want to solve system of equations \begin{cases} 2 x^2-5 x y-y^2=y \left(\sqrt{x y-2 y^2}+\sqrt{4 y^2-x y}\right),\\ \sqrt{3 y}+\sqrt{x^2+2 x}-x-x \sqrt{2+9 y^2}=0. \end{cases} ...
15
votes
1answer
229 views

Is the renaming mechanism of `With` flawed?

I'm confused about the renaming mechanism of With: ...
0
votes
1answer
26 views

converting a named graph into a graph object

I am seeking the edge lists of the complements of named graphs on n vertices. At first sight I would use ...
2
votes
2answers
38 views

Picking a dimension from an interpolating function

I have an interpolation function. Lets think of it as f={fx,fy,fz}. I would like to operate on the fx part of interpolation and say, multiply it by five and plot ...
2
votes
0answers
41 views

Is pattern matching just systematic guessing and checking?

How does the pattern matcher work? how does it match this example? f[3, h[4]] /. f[x_, z_[y_]] :> {x, y, z} My guess is that the pattern matcher collects all ...
0
votes
1answer
46 views

Manipulating of non linear differentials equation

I want to manipulate non linear differential equations $\dot{x}= x + g\, xy\quad \dot{y}= 1-2x^2-g\, y^2$ where g as parameter.but I don't get any curve on display. Plz help me
0
votes
1answer
50 views

Plotting the solution of a Chini differential equation

In DIFFERENTIAL EQUATION SOLVING WITH DSOLVE by D. Kapadia, there is a Chini differential equation : sol = DSolve[x'[t] == 5 x[t]^4 + 3 x[t]^(-4/3), x[t], t] ...
4
votes
1answer
95 views

Getting Area of a region transformed by GeometricTransformation

I tried this: Clear[b1, b2, A, p] b1 = {-1, 1}; b2 = {1, 1}; A = {{2, 1}, {-1, 1}}; p = Parallelogram[{0, 0}, {b1, b2}]; Then drew this: ...
0
votes
1answer
35 views

Plotting a dataset and its fit dynamically

I have the dataset ...
0
votes
2answers
39 views

Can you unpack a list of values into variables in a With expression?

For instance, if I am trying to draw a graph with 5 vertices labeled a through e, and I want to draw edges connecting a and b, a and c, a and d, a and e, b and c, b and d, and c and e, I would run the ...
7
votes
4answers
140 views

Replacing elements in lists of a nested list

I have the following nested list ...
0
votes
0answers
35 views

Create movies from data files

I've done some simulations of a trajectory of a particle and I have that trajectory saved in ".dat" files. Now I want to make an animation/movie and save it as GIF to include it on a presentation. I ...
0
votes
1answer
76 views

Solving Partial Differential Equations using NDSolve

I'm trying to solve the following partial differential equation: With the boundary conditions: I could use another way to resolve this, like the finite volume method, but after I solve the ...
0
votes
1answer
83 views

Setting components of a matrix

Suppose that we want to find some $N\times N$ matrix $A$ under some conditions. In doing so in mathematica, first I will set components of $A$ as follows: $A = \{\{a_{11},a_{12},a_{13},...a_{1N}\},......
0
votes
0answers
47 views

Problem with Volume and Parallelepiped

This worked (copied from the documentation), and gave correct image with Graphics3D. R = Parallelepiped[{0, 0, 0}, {{1, 0, 0}, {1, 1, 0}, {0, 1, 1}}]; Volume[R] ...
0
votes
0answers
36 views

Approximation number and remove the extra numbers

I want to approximate a number and capture it in a variable, but when I want to work with that variable the extra number that I wanted to remove in approximation gets involved. Can any one help me? ...
0
votes
0answers
50 views

How to take a list and build sets of 2 elements without duplicates?

I am new to Mathematica so the answer to this question is probably easy. I have a list of 2D-points in the form {{x1, y1}, {x2, y2}, ...} Then I have a function that will take two points and test ...
0
votes
0answers
51 views

Defining a function that depends on the length of a number and the $n$-th digit

I have defined the functions F[i][x] for i={1, 2, 3}.. I want to write a number that has only the characters 1, 2, 3, and I want ...
2
votes
0answers
61 views

Aguilera-Perez Algorithm of $nD$ rotation matrix

I want to compute a general $nD$ rotation matrix which corresponds to a rotation by an angle $\theta$ around an $(n−2)$-dimensional subspace. I found the Aguilera-Perez algorithm in their paper: ...
0
votes
0answers
91 views
1
vote
1answer
54 views

Form with FormFunction problem

I've this form: f[a_, b_] := a + b; form = FormFunction[FormObject[<|"a" -> "Number", "b" -> "Number"|>], f[#a, #b] &]; form[] How I can ...
0
votes
0answers
31 views

How to make a Dataset a Vector or Matrix? [on hold]

I have a Dataset containing some data. I would like to extract single columns as vectors so that I can perform vector and element-wise operations on them. Is this possible in Mathematica? For ...
3
votes
1answer
128 views

Symbolically prove that two expressions are identical

I encountered this problem when trying to reproduce the result of this paper. I want to prove int == intpaper assuming ...
1
vote
1answer
59 views

Running an external simulation program from Mathematica

I have a physics simulation program which I run through a terminal window (I use a Mac) as shown below: user$ programName inputfile.ele I would like run a ...
0
votes
2answers
102 views

Solve returns empty list

I want to solve these equations but Mathematica gives no answer. ...
0
votes
0answers
31 views

VectorPlot3D in cylindrical coordinates

I am using VectorPlot3D to plot fluid flows (in the form of a velocity field), however, I go through quite an involved process to convert flows in Cylindrical ...
0
votes
0answers
29 views

How to Extract Continuous .png Graph by Constant Piecewise Velocity? [on hold]

Time-Potential Data where the where the absolute values of axis do not matter but the points have possibly an equidistant piecewise velocity when comparing to the thread because regular jumps in the ...
4
votes
6answers
338 views

how to get $n$ equidistributed points on the unit sphere

We can get $n$ equidistributed points in the unit circle using CirclePoints. But how do you get $n$ equidistributed points on the unit sphere(surface of a ball)? ...
2
votes
2answers
59 views

How can I draw ternary plot by these data?

I have these data and want to draw similar fifures in mathematica. any one can help me? ...
4
votes
3answers
91 views

Expanding a matrix in a set of matrices

Consider a vector $a=\{a1,a2,a3\}$. I computed $e^{i a\cdot \sigma}\qquad \sigma: {\rm Pauli\ matrices}$ and then applied the command ExpToTrig. Now I want to expand the above result in terms of ...
6
votes
2answers
169 views

Samuel inverse graphing calculator

Samuel Inverse Graphing Calculator (http://www.xamuel.com/inverse-graphing-calculator.php) is a amazing tool. Whichever be your language, you can transform a sentence in an equation. I hav try with Yo....
2
votes
1answer
84 views

Solving 2D Laplace equation for irregular boundaries

I want to solve Laplace equation in 2D with $x$ and $y$ coordinates with the boundary conditions $V(0,y)=-180$; $V(x,0)=50x-180$; $V(x,6)=50x-180$; $V(453.595-\sqrt{450.05^2 - (y - 3)^2},y)=0$ The ...
6
votes
3answers
665 views

How to create this spikey in Mathematica?

I came across this post while messying around the StackExchange mobile. I think this thing can be easily done by Mathematica as well but I'm not an expert in geometric field. Can anyone give some ...
0
votes
2answers
145 views

How to do this 3D grid drawing?

The idea is to make axes 3d, with a more subdued in black mesh, and shafts with their respective numbers with a maximum of 10 in each (black to print after the size of half a sheet craft, vine also ...
6
votes
4answers
167 views

Efficient way to compute a complement while respecting multiplicities

Suppose I have list2 which is a subset of list1. I want to get a res by deleting an element ...
3
votes
0answers
59 views

ArrayPad with vectors

I would like to pad a nested list like M = {{{a, b}, {c, d}}, {{e, f}, {g, h}}} with some constant "vector", e.g. {0, 0}. ...

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