# All Questions

27 views

### Option ItemAspectRatio in GraphicsGrid has weird behaviour in MMA 10.3

Has anybody noticed that the Option ItemAspectRatio in GraphicsGrid is no longer valid? It ...
27 views

### A complete list of quantities in Mathematica 9/10? [duplicate]

Often times when I'm traveling I don't have internet access and cannot reliably use Wolfram Alpha for unit look-up. Additionally, Alpha can always choose to change how it interprets the units I enter, ...
50 views

### Generate a new list

Suppose we have the following sample data ...
19 views

### How could i find expectation of a function using symbolic math tool? [on hold]

How ti find expected value of large functions ?
52 views

### How to animate a propagating wave?

How can I animate a progagating pulse wave in Mathematica, for example a gaussian curve. I would like to do that for whatever function I can think of. Thank you!
146 views

### Run Command Not Executing Node

How do I make the following command work in Mathematia? Import["!\"C:\\Program Files\\nodejs\\node.exe\" -p console.log('test')", "Text"] I don't get any output ...
64 views

### Error message when using DSolve

I am trying to solve the differential equation $2y^2 + 2 x y y' + x y^3 y' - 2 x^2 (y')^2 + x^2 y y'' = 0$ I tried ...
69 views

### Getting errors NDSolve::nlnum, NDSolve::icfail)

I would like to plot the function v[r], and resolve this differential equation in spherical simmetry: ...
186 views

### How to interleave data in a certain way

Here's the deal: I have a table that has the form list = {{A,{a,b,c}},{B,{d,e,f}},{C,{g,h,i,j}}} and so on, where the innermost lists can have an arbitary ...
370 views

This time I have a very short question. Is there a deeper reason why ParallelMapThread does not exist? Regards, Frink
1k views

### Homotopy Visualization

I noticed that both the lower cased 'i' and the Apple logo  are topologically equivalent to the disjoint union of two closed discs. I'd like to animate a homotopy from the left to the right, can ...
57 views

### inset legend from top right corner / find size of swatchlegend bounding box

The question is the following. Using Inset, we can insert a legend in a Plot (in a Graphic, in general). E.g. ...
52 views

### My group and I are very lost, finding the zeros of the folowing functions [on hold]

We have to support our answers with a plot. 1a.) a z(t)+b t = c 1b.) -1.8y + 7.8x = 13.7 1c.) 3z - 4 i t = -8 1d.) 5x^2-11/3x-4=0 1e.) 4.95x^2-3.72x-4.08=0 1f.) 5x^2-11/3x+4=0 Thanks guys!
58 views

### How to solve this non-linear equation? [on hold]

b=12 a=2.787 solve[b/x-((1-(a*(((b x)/(b+2 x))^(4/3))))^(-2/3))- ((1+(a*(((b x)/(b+2 x))^(4/3))))^(-2/3))==0,x] I gave the above code and the output came ...
74 views

### Replicate an image from Documentation Center (EulerMatrix)

EDIT I try to produce an image similar to that (see here) but this time with an ellipsoid. I hope I am not wrong but the code that creates this beautiful image is not available in Mathematica's ...
3k views

### What's the correct way to shift zero frequency to the center of a Fourier Transform?

I'm trying to apply a Fourier transform of a one dimensional list of a time history of some quantity using the Fourier function. I'm interested in the frequency ...
27 views

### 2D vector treatment and visualisation

I'm just trying to define a set of vectors, in the Cartesian plane, draw the vectors originating from the origin $O,$ and be able to add vectors and draw the resulting vector. I've started doing ...
43 views

### WhenEvent behavior changed from v9 to v10 - how to fix the code?

A couple of years ago I asked a question about solving n-body systems with NDSolve and detecting collisions with WhenEvent. I ...
100 views

### Alignment of TreePlot

I want to construct a binomial tree using TreePlot but have troubles with the alignment. The code ...
704 views

### Detecting a collision in n-body simulation with NDSolve

Consider this three-body system: ...
35 views

### Read raw data from ipad accelerometer and gyro in real time [on hold]

I need some strategy to have real-time access to raw data of IPAD (or Iphone) accelerometer and gyro. Any hint to start?
13 views

### check the equivalent [duplicate]

Let f:=x^3+xyz+z^3; Let mat={{2,2,2}, {3, 1, 7}, {1, 6, 3}, {4, 5, 1}, {0,4, 9}}; I want to check at which point of m that the first derivate at x = the first derivate at y = the first derivate at z ...
37 views

### Apply Grad and Mod to Matrix

Let f:=x^3+y*x*z+z^3; Let mat = {{2, 2, 2}, {3, 1, 7}, {1, 6, 3},{4, 5, 1},{0,4,9}}; be a list of points . I want to compute ...
63 views

### Check an inequality if one condition holds

A = Abs[-1 + 1/(1 + β)] + Abs[-((1 + 2 α + Sqrt[1 + 4 α + 4 α β])/(2 α + 2 α β))] Is A <1 if ...
815 views

### Partition string into chunks

This seems like it should be trivial, but how do I partition a string into length n substrings? I can of course write something like ...
85 views