0
votes
1answer
14 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 ...
1
vote
1answer
9 views

Transposing X and Y on a plot

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 ...
0
votes
1answer
7 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. ...
0
votes
0answers
6 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 ...
0
votes
0answers
7 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 ...
3
votes
1answer
13 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: ...
0
votes
0answers
14 views

Defining QM 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 ...
0
votes
1answer
6 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. ...
0
votes
0answers
18 views
0
votes
0answers
17 views

solving an inequality

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

How to solve this conditional inequality with Mathematica?

I am trying to solve with Mathematica (see here for more info) Find all (real) numbers $a$ and $b$ such that $|a| + |b| \ge 2/ \sqrt{3}$ and for any real $x$ the inequality $ |a\sin x + b \sin ...
1
vote
0answers
11 views

Obtain $\TeX$ code as in `StandardForm`

This is a question very close related to Breaking up long equations in TeXForm. Last time, because @Adam doest not present a clear goal for this problem, as stated by Massimo Ortolano there's no ...
5
votes
1answer
71 views

Generate a list of symbols for the planets

I would like to generate a list of the symbols for the planets to include in a nice table with other data. How can I programmatically generate (eg. using a pure function) the symbols from a list of ...
10
votes
0answers
50 views

Eigenfunctions of the Laplacian on an arbitrary mesh

So, I've constructed a mesh over which I'd like to find eigenfunctions of Laplace's equation with a free boundary (a zero Neumann boundary condition along the edge). Mostly because I figured an ...
1
vote
0answers
28 views

Computing an inexact derivative with some terms preserved in exact form

I am beginning to learn Mathematica and have the following question: How can I return a derivative with exact numbers instead of one involving numerical approximations? My original, single variable ...
8
votes
1answer
118 views

Can A Plot Be Overlayed With A Map?

Some brief, only slightly important background. I am doing a research project using the data from NASA's GRACE mission. I wrote a short Perl script to take two data files and find the change in ...
0
votes
0answers
6 views

Negating a conditional statement [migrated]

Statement:If Fido barks, then Fido is a tree. Let p = Fido barks Let q = Fido is a tree. symbolic form p ---> q My attempt p --> q is logically equivalent to ~p V q Negation sentence: ...
4
votes
1answer
35 views

GridLines in TimelinePlot do not export to EPS

The below TimelinePlot produces the proper figure within a Mathematica session, but when that figure is exported as an .eps figure (to be used in a $\LaTeX$ ...
3
votes
1answer
57 views

Need help on the proper use of a formula to produce a cambered airfoil

Following the book on "The Theory of Thin Wing Sections" page #112 describes the method to combine a camber line (i.e Mean Line) and a thickness distribution to form a cambered wing section. Data ...
1
vote
0answers
30 views

Neural Networks in Predict function

I'm trying to reproduce the result giving by a Predict function with a Neural Network as the chosen method. So, I'm training from this set: ...
4
votes
2answers
65 views

Transpose can't handle fractions

Related to this question, why can't Transpose handle fractions? (Note the doc pages for Transpose hasn't been updated for v10) ...
4
votes
0answers
32 views

Why is Transpose Dataset slow in one direction

Transpose is faster when it distributes Keys at the 2nd level of a Dataset than when it factors them out. ...
0
votes
0answers
69 views

Shocks in a dynamic continuous time system

I have the following continuous time system ...
0
votes
2answers
39 views

Plotting direction fields along with trajectories

I am reading "Dynamics and Bifurcations" by Hale and Kocac, and in chapter one the following diagram is shown: Question is, how can I achieve the same plot using Mathematica? I've tried ...
0
votes
0answers
32 views

Link FROM mathematica TO c language

I have been working on linking C and Mathematica. I've found this link to be very helpful http://community.wolfram.com/groups/-/m/t/189735 However, what I would like to do is to write a program in ...
1
vote
1answer
18 views

Removing vertical/horizontal edges from some cell frames

I recently asked a question regarding adjusting adjacent cells' margins to make their background color appear continuous. With these settings in place, I'd like to put a single frame around the ...
0
votes
0answers
36 views

Showing all Digits

What is the simplest method to display all digits by adjusting this code? t = Table[1 + 10^(-n), {n, 1, 10}] // TableForm Output: 1.1 1.01 1.001 1.0001 ...
1
vote
0answers
21 views

Fit linear data with weights for y and x in LinearModelFit

I am quite new using Mathematica, I hope someone could give me some help. I have a set of {x, y} data and I have a list of {deltaX, deltaY} standard deviation. I would like to fit my data taking into ...
1
vote
0answers
40 views

Making Mathematica function files like in MATLAB

I'm a MATLAB user trying to get familiar with Mathematica. I have long Mathematica sheet that spits out some matrices at the end after much math. I want to run a loop over couple of different initial ...
1
vote
1answer
37 views

Summation notation

I have the current setup for calculating Allan Deviation: which was coded as: Sqrt[Total[Differences[y]^2]/(2 (M - 1))] However, after doing some research, ...
0
votes
0answers
27 views

How to Remove a Specific Element From a List [on hold]

I have a list of elements of which 0 is a member. I want to express this list without any of the 0's. How do I tell Mathematica to remove only the 0's from my list? The 0's can show up more than ...
3
votes
1answer
38 views

Can I install the Stylesheet from a Mathematica Journal article?

A discussion from 2012 suggested that it should be possible to download an article from the Mathematica Journal and install its stylesheet locally. I can download the .nb file but can not seem to ...
3
votes
3answers
202 views

Finding intersections of two parametric curves

I am dealing with the root finding of two parametric data curves (data below). I have already checked Parametric Interpolation of 2D data, which I found useful for plotting, though it is not adequate ...
4
votes
0answers
57 views

Synchrotron Radiation and ListDensityPlot

I'm trying to reproduce this plots: For this task i'm following this blog entry: Synchrotron radiation As you can see there, the task is to make a DensityPlot of a vector field essentially. This ...
0
votes
0answers
34 views

Boxed -> False does not work and I cannot figure out why? [on hold]

I am trying to construct the following graph, but when I add Boxed -> False I still have 2 vertices given. I cannot figure out why. Any help is highly ...
1
vote
1answer
69 views

Integral equation

I'm trying to solve the following integral equation: Integrate[-k/2 Exp[-k Abs[x-z]] f[x], {x,0,d}] == a f[z] Differentiating twice with respect to z should ...
0
votes
0answers
39 views

Error in FullGraphics V10.1 [duplicate]

Error in FullGraphics. FullGraphics[Plot[Sin[x], {x, 0, 2 Pi}]] Any idea why? Thanks
0
votes
0answers
25 views

NSolve running for ever

I have troubles running NSolve for my physics problem. I am new to Mathematica, which is why I might be missing some key solutions. I have the following function with the variables: ...
0
votes
0answers
5 views

how to find trigonometric angle of any value? [on hold]

how to find value for this- cot(1.3333) in degrees, without using a calculator? if it is possible please explain the process involved and how to find values of other similar questions.
2
votes
0answers
52 views

How to export a Mathematica notebook into Markdown?

Is there a way to do this other than html + pandoc?
3
votes
0answers
46 views

How to perform Bayesian optimization with Mathematica?

Does Mathematica have any Bayesian optimization methods for learning hyper-parameters? Practical Bayesian Optimization of Machine Learning Algorithms Jasper Snoek, Hugo Larochelle and Ryan P. ...
0
votes
1answer
59 views

How to identify and remove errors in a list

After some searching, I did not find a solution to the following problem, which in my thinking should have some very easy/efficient solution. I'm looking at a list of images (faces), that I want to ...
0
votes
0answers
27 views

Manipulate function as a form of human input [on hold]

I need to streamline a program where one of the lines is essentially Manipulate[f[dataset[a]], {a, min, max}]. I need ...
0
votes
0answers
48 views

Solution Branch Switching of Quartic

Im using a closed form solution for quartic equation. In the quartic equation, there are parameters that are being varied and therefore the solution changes depending on these parameters. The ...
1
vote
1answer
58 views

Apply NonlinearModelFit to an image

I have several images (in FITS format), which I want to fit with a 2D-Gaussian distribution. The problem is that NonlinearModelFit expects data in the form of a ...
5
votes
1answer
39 views

Update/refresh notebook variable color on clear

By default, Mathematica displays variable names already assigned as black while new variables are displayed in blue. When executing Clear["Global`*"], variables ...
1
vote
1answer
37 views

plot filling using blend and y value

I want to plot say Sin(x) with colorfilling. but I want the colour to be a gradient between white and red. When Abs[sin(x)] is maximum I want white, when its minimum I want the filling to be red. In ...
3
votes
1answer
40 views

Reals in Range; unexpected result for non-standard Precision

I think I have encountered advice against using inexact numbers in specifications of ranges and iterator many times. I don't think I ever saw an example of unexpected results though, but today I found ...
4
votes
1answer
72 views

Possible Bug of loading Package @ Mathematica 10.1

When I open mathematica, there will pop-up some messages where << package` is in the following file ...

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