# All Questions

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### 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 ...
61 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 ...
57 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: ...
71 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 ...
96 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,...
93 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 ...
57 views

### Dividing a list into more, smaller, lists [on hold]

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}?
49 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! ...
176 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 ...
50 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 ...
68 views

### Plotting with Logarithmic Scale

Perhaps this is trivial but I would like to plot the following function: $$p(t)=e^{\left( -\frac{d}{1-c}\right)\left[ W_0\left[B(1+x/r)^{1/d}\right]-W_0[B] \right]}$$ ...
101 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} ...
534 views

### Is the renaming mechanism of With` flawed?

I'm confused about the renaming mechanism of With: ...
36 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 ...
61 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 ...
48 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 ...
56 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
71 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] ...
109 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: ...
38 views

### Plotting a dataset and its fit dynamically

I have the dataset ...
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### 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 ...
152 views

### Replacing elements in lists of a nested list

I have the following nested list ...
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### Create movies from data files [on hold]

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 ...
99 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 ...
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### Solve returns empty list

I want to solve these equations but Mathematica gives no answer. ...
33 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 ...
30 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 ...
440 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)? ...
67 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? ...
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 ...
177 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....
114 views

### Solving 2D Laplace equation for irregular boundaries [on hold]

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 ...
698 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 ...
150 views

### How to do this 3D grid drawing? [on hold]

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 ...
169 views

### Efficient way to compute a complement while respecting multiplicities [duplicate]

Suppose I have list2 which is a subset of list1. I want to get a res by deleting an element ...
61 views

### ArrayPad with vectors [on hold]

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}. ...