# All Questions

4 views

### Reinstalling Mathematica pro on the SAME computer

I am currently wiping my ENTIRE hardrive and reinstalling Windows on my (currently very slow) laptop. However, I don't want to lose my expensive version of Mathematica, and it looks like Wolfram is ...
8 views

### Graphics3D plot of group of Vectors

I am trying to overlap 2 different Coordinate Systems (C1,C2). I want it to be visually pleasing but it is increasing the length of code I tried ...
6 views

### TreeForm outputs different results for the same imputs but why?

First of all, please look at the below inputs and outputs: ...
19 views

### Quartic function from data

I am studying something about interpolation. I have a function that is a power x function ($f[x\_]:=17000x^{-1.85}$). From this function I got a list with coordinates for X and Y ($data2$) With ...
21 views

### Deleting circular regions from a larger Circle

I am trying to determine how the Dirichlet eigenvalues of the Laplacian of a circular region change. I would calculate the principal eigenvaluen of this image, and gradually decrease the radius of the ...
19 views

### Simple qualitative sketches in Mathematica [duplicate]

I have always used Inkscape for sketches like the one below. Nonetheless, I am pretty certain that Mathematica is capable of creating something similar. How would I ...
14 views

### How to type greek letters on mathematica.stackexchange [migrated]

I usually ask questions on this website, and many of them contain greek letters in the code part. For instance: \[CapitalTheta]=0 After a while, someone edits ...
19 views

### Plotting topological defects with VectorPlot

I have been trying to create a table with the graphs of the lowest winding number topological defects that can appear in a nematic Liquid Crystal. That is what I have been able to do so far: ...
24 views

### How to pass variable to rule [on hold]

To export figures with specific font family and size, I define the following: LaTexFonts = {LabelStyle-> {FontFamily-> "CMU Serif", FontSize-> 14}}; Now ...
32 views

### Is there an equivalent to Mathematica's ToString in R for use with RLink?

x = "vvvv" REvaluate["f(\"vvvv\")"] (*works*) Want to replace vvvv with x: ...
57 views

### Why does Show ignore the option Joined -> True

I have this code: ...
26 views

### What are the differences between Clear, Remove, ClearAll, Unset and TagUnset, when to use which?

What are the influences of these operations on things like UpValues, DownValues, OwnValues and whether the kernel knows the symbol? When do I use which? I know ...
15 views

### How to resolve this issue related to Conjugate?

When I perform the vector multiplication given below FullSimplify[{a,b}.Conjugate[{a,b}]] I am getting the result as I expect ...
39 views

### How to transform the $y$ values in a list of $(x,y)$ pairs [duplicate]

How can I transform data = {{1, 0}, {0, 1}, {1, 1}} to {{1, f[0]}, {0, f[1]}, {1, f[1]}} This is similar to ...
28 views

### ParametricPlot3D step size

I tried to use ParametricPlot3D which appears in the kernel, such as; ParametricPlot3D[{xALL, yALL, zALL}, {ξ, 0, 5}, {η, 0, 3}]; but here parameter's step size ...
22 views

### SparseArray Band with Array [on hold]

Probably a very simple problem : Why do I get z^2 and not z, and in the other case it works with a number ? Thanks, Edit: Copyable Code ...
24 views

### How to pair elements of a nestlist? [duplicate]

I have a this list for example expdata={{49, 50, 51, 52, 53, 54},{0,3,5,2,0,1}} and I want to rearrange it like this ...
54 views

### Henon Map Fixed Points Plot versus Iterations and Plot of the Map

For the Henon Map: $$x_{n+1}=y_n+1-αx_n^2, \quad y_{n+1}=β x_n$$ I would like to discover period doubling bifurcations by varying the parameter $α$ and plotting $x_n,y_n$ versus the iterations $n$ of ...
22 views

47 views

### Why does DeleteDuplicatesBy fail?

This is a pretty straightforward code. I just want to delete duplicates based on the final entry in each row. I have evaluated very similar numbers with no problem. ...
412 views

### Data extraction from a picture of a graph

How can I extract data from this picture of a graph? i = Import["http://i.stack.imgur.com/Ac8m0.png"]; The caption of the picture reads: " Two-dimensional ...
36 views

### Hide Notebook scrollbars

Is it possible to hide the scrollbars from the notebook windows while still being able to use the mousewheel to scroll? Since I never click on the bars themselves they're just a waste of space. It's ...
34 views

### Easier way to input Dynamic matrix?

I've only been using MMA for a month, and I'm working on making interactive Linear Algebra examples that will be used online for students. Right now, for inputting numbers into a matrix, I've been ...
57 views

### Visualization problems [on hold]

I am visualizing 1-dimensional curves that are periodic. Due to periodicity, extending the domain should result in the curve being retraced and therefore remaining unchanged. This doesn't seem to be ...
50 views

### How can I get the differences of all elements of list? [duplicate]

I want to get the difference of all elements of a list for example: $L=\{1,2,3,4,5,6\}$ for any $i$ and $j$ $\in L$ return the differences, for example for the first element $1$ we get the difference ...
31 views

### Drawing Arrows to connect points from two separate data sets representing coordinates

I have 2 separate excel files that I'm importing into Mathematica. Each excel data file has numerous rows of data containing a coordinate of three columns (x,y,z). I have been able to plot these ...
54 views

### Henon Map Equation Trekker

I am trying to make an Equation Trekker for the Henon map in the following way: ...
35 views

### High CPU load for dynamic classification

I encountered some issues with extremely high CPU load when I tried to classify live images (using Dynamic and CurrentImage[]). ...