# All Questions

11 views

### Problem in Plotting the function dependent on other function?

I have a function c given below. ...
17 views

### Saving a notebook before a crash

On the MacBook Pro, Command+S saves the notebook. So, every few minutes, Command+S is invaluable. What do other folks do? For example, in TexShop, when I compile my LaTeX code, the file is ...
30 views

### Shadowing of optional function arguments?

I am trying to define two different packages that process some information in a different way. These packages have functions into them with optional arguments. The names of the optional arguments ...
18 views

### Is there a function equivalent to rewrite function in Sympy

Sympy provide rewrite function to rewrite expression in terms of other functions. ...
30 views

### How to count column occurrences in a matrix?

I have a matrix of data, and I want to count the number of columns that match, and have some way to organize them by frequency. But I don't want to count the entire column, but consider the matrix ...
26 views

### RegionPlot3D Empty

I am attempting to cut out holes in a sphere, circumscribed around a regular tetrahedron. To do so I define some points (p1 through p4 are the vertices of a tetrahedron) ...
14 views

### Why does the degree symbol disrupt this FrameLabel?

This plot Plot[x, {x, 0, 1}, FrameLabel -> {"x", "temperature / \[Degree]C"}] displays beautifully, but exporting to PDF ...
85 views

### Tube vs. Cylinder

What is the practical difference between plotting Tubes and Cylinders? The documentation for each describe a 3D tube/cylinder around the line between 2 points....they seem identical. However, there ...
32 views

### Translating and Rotating a Region

I'm having an issue that is related to an old question (How do I plot a filled cylinder in 3D?), but it's an extension of it. The previous question details how to make 2D slices of a 3D region with ...
158 views

### Deleting Lonely Numbers From a List

Suppose I have a list of integers like so: list = {1,2,5,6,8,10,11,12,14,16,17,18,19}; I'd like a function that will take this list and return a new list with ...
11 views

### list of graph fucntions that work correctl with edge weights?

Unfortunately I've found a few bugs in v10 surrounding the use of EdgeWeights. Is there a complete list of functions that have been tested and are supposed to work correctly with them?
10 views

### CUDA problem: CUDALink experienced an unknown error

I found the document here just after I have posted it, but I will leave the question open in case people want to discuss this a bit more. I was just trying out my GPU, so I used the code here. My ...
20 views

### Avoiding overlap in rendering of GraphPlot

I'm trying to visualize some 'graphs' (i.e. the mathematical objects with nodes and edges) using GraphPlot[]. I am defining the nodes using objects such as ...
14 views

### How many kernels to set based on CPU?

Looks like 4 kernels are enough? My CPU is i7 4790K as given here. Does it also depend on the tasks and the codes? My understanding is that regardless what the benchmark says, I could always use ...
31 views

### Adding a title that includes angle between two vectors in Graphic in Manipulate

Here is what I have tried thus far: ...
19 views

### How to plot python matplotlib plots from mathematica

I have a python matplotlib plot (a line graph)and I have another mathematica plot (a line graph). They have the same x-axis and y-axis. However they have different style (fonts, color, line thickness, ...
32 views

### Solve defined integration problem

How can the following be solved for ln(L_i/L_f) ? Limits are in good place in this problem. ...
28 views

### Referring to arguments in nested functions

I am interested in executing the following command but don't know the proper syntax to distinguish between nested arguments, here at the Select[] and Map[] levels. For example, ...
38 views

### Analogue of Maple's identify command in Mathematica [duplicate]

In Maple there is a useful command identify that tries to find a closed form expression based on its numeric approximation. As far as I know there is no built-in ...
34 views

### Is there any way to pull interest rates, or an interest rate curve, with FinancialData[]?

Let's say I want to know the 5 year swap rate and the 10 year swap rate right now, is there a way to get this with FinancialData[]?
26 views

### Region Intersection for MeshRegion objects embedded in 3D

How can I create a logical intersection of MeshRegion objects that are three-dimensional? The RegionIntersection function will ...
41 views

### Can't call function from other function

I'm trying to calculate vector projection of vectors. Trouble is that Dot operator doesn't work when I call mine Ort function. What can be problem? ...
40 views

### Grouping large dataset across a large range of values

I have a large data set that I would like to group based upon the quantiles of one specific column. My test data set is about 2.1 million rows by 9 columns (the actual data set will be much larger). ...
29 views

### NDSolve with shooting method

Here are my equations: ...
35 views

I have data ...
29 views

### Integration problem: lrgexp

I want to calculate the following integration but it gives the error PolynomialGCD::lrgexp: Exponent is out of bounds for function PolynomialGCD. The code is: ...
52 views

### Do loop not working as expected

I am trying to get rid of data in a list. Every three elements I want to delete. Example below: ...
41 views

### Maximise a function over one parameter that is continuous, and one that is discrete

I have a function that I would like to maximise with respect to two parameters: one continuous, another which is discrete. A simple example of this might be the following: ...
31 views

### i need a swap mutation code (genetic algorithm) in Mathematica?

I'm working on GA coding to optimize the locators position in fixturing system to minimize the error in precision manufacturing.I need a code for mutation (genetic algorithm) in Mathematica. Here, I ...
21 views

### Manipulating the output of EllipsoidQuantile

I am trying to manipulate the output of EllipsoidQuantile to find the area in the next line. I can easily find the 95% confidence interval and this generates an ...
22 views

### 6 columns output file

I want to create a 6 columns data file with Mathematica, so I tried the following code: ...
33 views

### Construct a function whose definition depends on the values of its arguments

I have to evaluate the components of a 6x6 matrix $S$. This matrix depends upon the semi-axes of an ellipsoid $a1$, $a2$ and $a3$. For various specific cases (sphere, prolate spheroid, oblate ...
46 views

### Derivative of Continuous and Differentiable Piecewise function is indeterminate

I'm attempting to analytically stitch together two linear functions with two quadratic functions. The function I'm considering, then, is a piecewise function consisting of 4 parts. Below are the ...
49 views

### How can I plot the following set?

I have a question: How can I plot the following set $$G:=\{(x,y,z)\in\mathbb{R}^3|x^2+y^2\in[0,4],z\in[0,3]\}?$$ Thank you for your help!
13 views

### Common subexpression elemination of complicated function by nesting using HornerForm and ExperimentalOptimizeExpression

I want to have common subexpression elimination of comlicated functions where the elimination is done by factoring out the expressions. The result is not to be digested by a compiler, it should remain ...
20 views

### create subsubsubsection in Standard Report Style

I am working with Standard Report Style. When I press for instance Alt+5 a Subsection is generated. When I press Alt+6 Subsubsection is generated. What I want is a creation of something like Alt+foo, ...
21 views

### How can I stop PlotRangePadding from cutting off points in a ListPlot?

When I perform a 2D plot and want to highlight specific spots in the plane, ListPlot seems like a good idea. However once I want to get rid of the padding, my points are getting cut off. This is ...
21 views

### How to generate a list 'without index' (i.e. {i1, i2, i3…} instead of {i[1], i[2], i[3]…}) [duplicate]

What are ways to generate a list of the form (and arbitrary length)? [i1, i2, i3]
61 views

### NSolve returning an empty set

Dear Mathematica experts. I am a chemist looking to use Mathematica to solve a system of equilibrium equations. I have a system of 8 polynomial (I think) equations with 8 unknowns, yet when I use ...
47 views

### Transposing X and Y on a plot [duplicate]

This question has appeared in many forms online, but none directly apply to my problem. I have a quite complicated, albeit bijective function of the form ...
33 views

### How to swap tensor indices without permutation?

Say I have a tensor of rank R, How to swap $i^{th}$ and $j^{th}$ tensor index? I do not want to use TensorTranspose because it requires to write down the entire permutation, i.e. ...
26 views

### Alt+Gr issue with Mathematica 7 on linux

I have the same issue as described in https://matteochinazzi.wordpress.com/2010/04/12/mathematica-alt-gr-issue-under-linux/ So basically whenever I use AltGr to write [ or ] in Mathematica, it ...
22 views

### VertexDelete not working on graph with VertexWeight

Good afternoon, I have observed an "unexpected behaviour" with VertexDelete and a graph with vertex weights. This is a minimal working example: OK ...
58 views

### Naming conflicts with Dummy variables in several packages conflicts

I'm using several packages in a notebook. In each packages there is functions defined with dummy variables. When I load the several packages in my session, i've got a warning message: ...
245 views

### Defining quantum-mechanical Bra and Ket operations

I have the following ket in the Fock basis: $\vert3, 0 ,1\rangle$, where each entry defines the number of photons in a particular mode and can take any one of the following numbers: 0, 1, 2, 3. As a ...
14 views

### Minimizing using indices, error: Part::pkspec1: The expression cannot be used as a part specification

I want to use Minimize where the variables to minimize are indices pointing into an array. Here a MWE that hopefully shows what my problem is. ...
47 views

### same code different results on different computers

This very simple code: ...
35 views

### solving an inequality [on hold]

I guess this is rather trivial. I want to solve the following inequality 1/(2 n + 2)! < 10^(-6) What I did is ...