# All Questions

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### Why doesn't DeleteDuplicates do what I want

First off. I am not a mathematician I am a linguist, a syntactician who is trying to say something about semantics, which in the case at hand can be largely understood to reduce to set theory. That ...
91 views

### Simplify seems to give wrong result [closed]

I have an very long expression named "Bug", which is made by different precision numbers. When I directly apply Simplify, it seems to give me a wrong result. However when I apply SetPrecision to set ...
304 views

### Convert symbolic to numeric code: speed up morphing

Recently I asked a question about the morphing between two functions and got two excellent answers. The accepted answer is using the continuous optimal transport theory. This seems to be very suitable ...
78 views

### Is it possible to get current thickness for every Line, Polygon, Circle object in a plot?

When exporting Mathematica graphics to raster formats with high resolution the common problem is that thickness for such objects as Line, ...
38 views

### Confusing behavior of LQR control that strongly depends on system output (with odes solved by NDSolve)

I am implementing a LQR control of a 3-floors structure. Firstly, I obtained a reasonable result with my first code (Code 1 as shown below). In this code, the ...
27 views

### Can't modify “Kernel Configuration Options”

Immediately after adding a kernel using the Evaluation --> Kernel Configuration Options, I cannot further modify the list of kernels in that configuration panel (...
48 views

### Visualizing a system of differential equations [closed]

I have the following system of differential equations: x'[t] == x[t] - x[t] y[t] y'[t] == x[t] y[t] - y[t] I use this Wolfram Mathematica code: ...
31 views

### Order of evaluation of variable

I'd like to control the order of evaluation in a multi-variable function. Example: Suppose I have the function: B[x_, y_] := x + y/x; If I try to evaluate ...
28 views

### I need to extract data from a multi-valued functions and interpolate them into separate single values functions

The graphed data look like this. I need to extract the data for each curve individually and use Interpolation to create a differentiable function for each curve. Can you show how to do this? I will ...
59 views

### pHow can I reposition the axes of a 3D plot? [closed]

I'd like to reposition the axes in my plot of a surface. Please consider the following code: ...
44 views

### How to extract and plot pieces of a multi-valued function

I have multi - valued functions that create lists of data like this: ...
59 views

498 views

### Grainy 2D RegionIntersection Plot: How can I make it smoother?

I have the following code to display three coloured disks and their coloured intersections. However, the result does not appear to have been anti-aliased enough. How can I make it smoother? ...
52 views

### How to address an element of variable vector for coupled system of ODE while using NDSolve

I am using Mathematica from around 10 months. I want to solve numerically a system of equations with number of equations more than 35 to 40. System of equations is shown below for small number of ...
59 views

### MaTeX stopped accepting certain font sizes

My system: Windows 10, Mathematica 11.2 Problem: I have been using the fine MaTeX paclet to get nice symbols on my plots. As I scale the images in a TeX-document after exporting them in EPS, I need ...
50 views

### Contour plot from list of 4D points

I have tried everything I think but I could not obtain a 3D contour plot from a list. Here is my code. Could you help me find the mistake I made? ...
99 views

### How can I analyze image colors expressed in the CIELAB L-a-b model? [closed]

I have a database of colors in L-a-b format. I want to analyze how many colors there are [in an image (??)], and I want to know the quantity of each color that it contains. For example: I want this ...
252 views

### How to draw a 3D point moving along a helical path?

I have an animation for a helix being drawn in 3D but I really want to have a point on there that draws the helix. I've seen similar problems on here for 2D and I tried adapting the suggestions but I ...