0
votes
0answers
13 views

Problem with 3D plots window crashed

My mathematica7 window in fedora21 crashed when 3d plots are rotated without any warning message. I checked webpages for any solutions and found one answer. I followed it typing mathematica -mesa ...
0
votes
0answers
16 views

Time zone Projection

I'm not entirely sure if you can do this, but I'm trying to import a sphere with an accurate time zone projection into a CAD program called Rhinoceros 5. Is this possible? I need it in Rhinoceros 5 ...
1
vote
0answers
22 views

How to restore corrupted files?

I have a file that I can't reopen because MMa was "Not Responding" and I had to shut it down. I found links online to this: http://support.wolfram.com/kb/12423 I executed those two instructions in a ...
0
votes
0answers
19 views

How to avoid “Quit[]” to execute notebook multiple times

I am using a program to binarize several images and then adding all the images together using "ImageAdd" to get one image. This image is required for further analysis of the images. The program ...
1
vote
1answer
42 views

EquationTrekker using Mathematica 10.2

I wonder whether the problem that arise with the following code is specific to my machine, as it seem to work with the documentation example. ...
1
vote
1answer
66 views

Looping through 3 million elements of a list to 'Set' values is slow

I am looping through the 3 million elements of a time-series (v1, o1) and corresponding values (v2, o2). v1 contains a uniformly increasing timestamp (e.g. 1 to 3,000,000 in increments of 1) o1 ...
0
votes
1answer
41 views

Problem with mathematica plot 3d [on hold]

u[x_, t_] := (x - t)*e^(-(x - t)^2) u[x, t] Plot3D[u[x, t], {x, 0, 5}, {t, 0, 5}, AxesLabel -> {x, t, u}] I get an error Plot3D::exclul: {Im[e]-0} must be a ...
0
votes
0answers
20 views

Problem with mathematica code [duplicate]

Plot3D[u[x, t], {x, 0, 5}, {t, 0, 5}, AxesLabel -> {x, t, u}] I get an error Plot3D::exclul: {Im[e]-0} must be a list of equalities or real-valued functions. ...
4
votes
1answer
47 views

Get Fit Weights from LinearFitModel Object

Suppose I have the following data: ...
-2
votes
0answers
17 views

Find the feasible set of a PL - MIN Z [on hold]

I have to minimize a function under the following constraints: ...
2
votes
0answers
19 views

What are all the elements of the expression returned by KalmanEstimator used for?

The first "Application" in the documentation for KalmanEstimator is coipied below with additional variables for clarity. ...
-2
votes
1answer
39 views

How to sort my list? Help [on hold]

I have a list={1,2,3,4,5,-6,9,3,12,0,-3}. I want to sort its, as way {even,odd,even,odd,....}. Moreover in crescent way for even and odd numbers. So the result ...
0
votes
1answer
55 views

Eigenvectors of numerical matrix

I have a large numerical matrix whose eigenvalues are all distinct. In the documentation for Eigenvectors it says: For approximate numerical matrices m, the ...
2
votes
1answer
39 views

Plot using a list of variables

I have the following code: ...
4
votes
2answers
63 views

FunctionInterpolation and Which combine badly

Update: The main question has been answered, but my problem hasn't been solved. The problem is I have a situation where I want to use Which on an InterpolatingFunction several times to repeatedly ...
3
votes
0answers
44 views

NSolve doesn't work on an equation containing a numerical integral and constraints

I'm having trouble getting Mathematica to solve equations numerically. I know that its important to specify the type of variables for pattern testing (see e.g. here) but this doesn't seem to work. ...
0
votes
1answer
68 views

Special fractions generator

Note that 13/33, 1313 / 3333 , 131313 / 333333, ... They are always equivalent fractions Fraciones generate desire to have this property based arbitrary ...
4
votes
3answers
170 views

Constructing Tri-Diagonal Matrices

Fractional Calculus Course, we are instructed to create an $n \times n$ Tri-Diagonal matrix in the form of: \begin{array} a A &= \begin{bmatrix} 2 & -1 & 0 & 0 & ... ...
4
votes
1answer
63 views

Finding planetary conjunctions with Mathematica (project-level)

Summary: What's an efficient way of finding planetary conjuctions with Mathematica using the SPICE kernels, and without using AstronomicalData (which I believe is less efficient). NASA publishes ...
6
votes
3answers
99 views

Fitting data with interdependence

I have an issue, of which I'm not sure it can be solved, with or without Mathematica. I feel as if it should be possible, but I'm quite clueless as to how. Some introduction is required. I'm working ...
0
votes
0answers
7 views

Lychrel number Algorithm [migrated]

Recently became fascinated with the search for Lychrel and palindromic numbers as recreational mathematics. for the who are unaware, the process for performing this check on a number manually is as ...
-1
votes
1answer
65 views

Are these codes the same?

I have this code: ...
6
votes
2answers
111 views

ListLinePlot Filling Wrong

Bug introduced in 8.0 or earlier and persisting through 10.2 or later. I used ListLinePlot to plot data from .csv files. However, the y-values from Graph 1 do ...
0
votes
1answer
63 views

Using Plot and Piecewise to graph a roller coaster

I am graphing a roller coaster using Piecewise and Plot commands on Mathematica. I have the first 2 Piecewise functions and would like to add a loop to the end of it. Here is my initial graph: This ...
3
votes
1answer
36 views

NDSolve: obtain time difference when different solutions get same distance to equilibrium value

I have a numerically solved a differential equation which has an equilibrium value and a starting point, both included as a parameter. I want to plot the difference between the times it takes to come ...
2
votes
0answers
26 views

“Undo” not working for script, gothic, and double-struck letter forms?

Has anyone else experienced anomalous behavior using "Undo" (Ctrl-z) with notational alphabet letter forms? Since Mathematica's built-in functions are capitalized, one generally avoids beginning ...
3
votes
1answer
83 views

DensityPlot: giving the same color to a range of values

The following command DensityPlot[x y, {x, -3, 3}, {y, -3, 3}, PlotLegends -> Automatic, ColorFunction -> {"Rainbow"}, PlotRange -> {{-3, 3}, {-3, 3}}] ...
4
votes
0answers
36 views

Can I customize the shell command line prompt?

Is there a way to customize the command line prompt (e.g., colorize it) for MathKernel when it runs as a shell command (in general, but specifically on OS X)?
3
votes
2answers
132 views

Automatically detect higher slope in numerical data (within a certain range)

Suppose the dataset data is part of some simulations whose results should follow a certain model. Here is data and its ...
2
votes
0answers
94 views

Brownian Bridge - Multiple Paths

I am attempting to simulate multiple Brownian Bridges on the interval [0, 1]. I have the following snippet: ...
0
votes
1answer
67 views
0
votes
0answers
4 views

Posted a question, then finshed registering. But the questions is not mine [migrated]

I posted a question on this website (http://mathematica.stackexchange.com/questions?page=2&sort=newest), and then I completed the registration afterwards from the email that was sent. However, the ...
0
votes
0answers
67 views

Solve won't solve $x = y^2 - z^2$ for $z$ [on hold]

Although this equation can be solved in my head, it's bugging the crap out of me that Wolfram|Alpha can solve this, yet Mathematica can't. I'm trying to solve this equation for z: $\quad \quad x = ...
1
vote
0answers
28 views

import of a opj file (Origin)

Is there a way to import a file of opj-type? Or do you know a package to convert the data? The Import[] function seems not to know this format.
-2
votes
0answers
32 views

ExportString and CreateExecutable

Re Mathematica 10.2 under Windows 8.1. The following post to Wolfram Community ... http://community.wolfram.com/groups/-/m/t/556769?p_p_auth=PQNE4sC5 ... asks why an error message says "...convert ...
3
votes
2answers
132 views

Modifying the content of a list

If I have a long list of form {{1,2,3,4},{5,6,7,8}, ... {97,98,99,100}} how do I edit/convert it by adding the text as shown below ...
0
votes
1answer
50 views

ParametricPlot and Piecewise function

I want to create a ParametricPlot with multiple Piecewise functions in it. I have tried the following code but it doesn't work ...
7
votes
1answer
88 views

How to generate a closed B-spline curve?

I wrote a function called deBoor by the Cox-De Boor algorithm to generate a B-spline curve. ...
1
vote
1answer
49 views

How to DumpSave all variables or the whole notebook?

Is there a way to DumpSave all the variables in the notebook? Or better whole notebook so that opening it would restore all the definitions.
5
votes
1answer
46 views

Generating repeated elements in a list [on hold]

Is there a function in mathematica that allows you to generate repeated elements inline within a list. For example, let's say you provided this as input text: {1, 2, 3, 4, Repeat[5,3], 6, 7} ...
-3
votes
0answers
32 views

integral-equation of Wentzel–Kramers–Brillouin [on hold]

I need a code that can help me to solve the WKB equation for the eigenenergies for any given potential
0
votes
0answers
59 views

Need to plot binomial distribution probabilty function [on hold]

I am incredibly new to using Mathematica, and struggling to learn it as I have very little experience with any sort of software more complicated than excel, so I am very sorry if this is a stupid ...
0
votes
0answers
20 views

How to Expand an expression joining variables [on hold]

How can I obtain, starting with ax (a - x)^2, the expression ax^3-2a^2x^2+a^3x? If I try ...
1
vote
1answer
32 views

Extract list of values associated with specific header within an expression

I would like to have a function that can extract from an expression a list of values that are within the brackets of a certain header at any level: ...
-1
votes
0answers
30 views

Calculating mixed strategy equilibrium in battle of sexes [on hold]

How to calculate the mixed strategy unique equilibrium in the following modified battle of sexes game: Player 2 A B ...
3
votes
1answer
67 views

Why am I getting different answers for integral depending on method?

I'm trying to carry out an integral and I'm finding different answers depending on which method I choose to integrate with. I assume this has something to do with divergent pieces but I don't ...
1
vote
0answers
37 views

Mathematica 10 on Ubuntu: Extremely slow input and random key inputs

I have some problems with my mathematica 10 on Ubuntu 12.04. First, the keyboard input is extremely slow. I press a key, and then the input comes with a delay. This makes typing very cumbersome. ...
2
votes
2answers
135 views

How to solve this two algebraic equation simultaneously for u and H ?(all real number)

I want to find the non-zero value of H when beta is changing(especially what value of beta when increasing will there be a non-zero H value). H is between [0,100]. This is actually the calculation ...
2
votes
1answer
69 views
5
votes
1answer
67 views

Searching for literal strings with TextSearch

The documentation indicates that TextSearch can be used to look for a "literal string" inside documents, but it appears Mathematica may be applying a regex-style ...

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