# All Questions

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### Fourier series - value at a point

I would like to receive the value of the series in point (3,3). Plot3D[((27000000000*((0.2)^3))/(12*(1-((0.2)^2))))Sum[Sum[((((0.2(mPi/6)^2)+((nPi/4)^2))*(( ...
6 views

### NDSolve and equations of motion

I am trying to use NDsolve to solve a set of coupled second order ODEs. Here are the initial conditions: ...
9 views

### how to get from this expression to the next

I want to get to this expression (4FL^3)/Eb^4 however, no matter how I try to rearrange the given expression I am struggling to figure out how to get to this expression below? (FL^3)/(3E(b(^4)/12))
20 views

### Special Case of Filling Between Curves

Hi guys, Thank you very much in advance! Best regards Nina
23 views

### List of Coordinates at Mouse Position

I have the following image I want to semi-automate the process of me collecting coordinates for all the vertices. What I have in mind is putting my cursor over each node and appending the coordinate ...
30 views

### Is there a way to get the exact measurements on the screen in mathematica?

Suppose I want to make a rectangle that is 50mm x 70mm and I want to inscribe a ellipse with x radius 10mm and y radius 15.5mm centered at 20mm from top and in the middle across. I can get the ...
21 views

### TensorProduct not working

I am currently trying to get the following to work: ...
27 views

46 views

### How do I plot a parametric function? [on hold]

I want to plot this parametric function: $\qquad x=2\,\cos(\sqrt{12}t- π/3),\,y=4/\sqrt3 \sin(\sqrt{12}t- π/3)$ where $t$ goes from 0 to 8 I tried to make a plot, but I didn't know how because it's ...
49 views

### How can an envelope be drawn around a scatter plot?

Can Mathematica be used to create a ListPlot with the feature shown below; a line around the cloud of points? I am not entirely sure what rule would create the desired effect (i.e., what points ...
40 views

### NIntegrate over regions, FiniteElement options

I am using NIntegrate to integrate a 3-dimensional region. When I don't set any integration options, I get a warning The global error of the strategy GlobalAdaptive has increased more than 2000 ...
33 views

### Changing ContourStyle based on an inequality

I would like to create a bifurcation diagram with ContourPlot. Suppose I want to plot the contour 1-2*a*Q+3*Q^3==0 with ...
331 views

### Speed up animation

For a project I need to make a little animation showing what happens when you put two hexagonal lattices on top of each other and rotate one of them(Moiré pattern), and my advisor sugested using ...
51 views

### How to use deep clones in Mathematica

Is there a way to use deep clones in Mathematica? Maybe by making lots of different kernels. In order to execute multiple notebooks I need more than one kernel, is there a way to make them using C# ...
31 views

### Is it possible to plot a manifold from it's metric / line element in Mathematica?

i'm very new to using Mathematica and mostly just trying to work out what it can or can't do. I'm doing a course on differential geometry and was wondering if there might be a better way for me to ...
76 views

### How can dates be formatted with Tooltip in a DateListPlot?

After creating an association of time series as follows: ...
73 views

### Graph that visualizes subset relations

First, off I am a bloody beginner when it comes to programming in general and Mathematica in particular. I only started using it so I can make sense of my suggestions for the semantics in my syntax ...
82 views

### How can I simplify my geometric calculation?

Here is a math problem I am dealing with right now: Given ellipse $C$: $x^2/a^2 + y^2/b^2=1$ ($a>b>0$). Ellipse $C$ passes through the point $P$: $(1,3/2)$, and has eccentricity $e=1/2$. ...
57 views

### Testing the accuracy of numerically computed derivatives

I am calculating approximate derivatives by using NDSolve`FiniteDifferenceDerivative, so this works: ...
25 views

### How to get the NDSolve to seek only a real solution?

I use NDSolve to solve system of 2 ODE of 1st order: ...
71 views

### SmoothHistrogram plot is not smooth [on hold]

I used the following code to show a small hump near 5000. With R it's fine but for some reason Mathematica draws strange vertical lines. I tried several combinations of ranges. (Data from here or here....
35 views

### Identify and Assign Values to Regions in the Map

so I want to do a simulation of the spread of a certain disease in California with spatial considerations. As such, in order to carry out the PDE calculation, I will need to extract the region of ...
33 views

### Having trouble making a computation into a loop

I have written the following code which works properly. However, I need to run a part of it as a loop, but when I try to add a loop, I encounter many errors. I tried by ...
35 views

### How can I derive a scatter plot from histogram data? [on hold]

This is the code that generates the histogram. ...
67 views

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### help needed to understand the syntax of the scatter plot graph [on hold]

how would the code/syntax for a graph like this, i need to replicate it with the information given
242 views

### Showing a point on a plot as a circle rather than a disk

Consider the following code: ...
49 views