3
votes
0answers
25 views

Can I ` Delete ` a Databin?

Can I Delete a Databin? Databins[] (* {Databin[Short ID: 6P1ixTl6Entry count: 0]} *) question1: look, I have one ...
0
votes
1answer
15 views

Extract coefficient from LinearModelFit

I want to know how to extract the coefficients from the result of LinearModelFit. The functions used to fit are complicated and being in different forms. For ...
3
votes
0answers
19 views

Can I get my directory namelist from wolfram Cloud?

Can I get my directory namelist from wolfram Cloud? ...
0
votes
0answers
11 views

A better alternative to the paired bar chart

In an nice blog post about the horrors of the paired bar chart, Jonathan Schwabish proposes an elegant alternative, as follows. Instead of having parirs of yellow and blue bars, simply plot their ...
0
votes
0answers
12 views

How to draw graph for NDSolve answer for different values

i want to draw the graph for different values of e from -14 to -12
0
votes
0answers
21 views

Laplace transform and inverse transform question [migrated]

Appreciate advice on the above equation. I got the answer showed in the snapshot, but not sure whether it is correct or not.
0
votes
1answer
23 views

Evaluation of a Laplace transform for e^-at does not give expected results [on hold]

LaplaceTransform[E^-at, t, s] That is my input, and the output I am expecting is 1/(a + s), but I am getting ...
1
vote
1answer
25 views

Mathematica not responding to clean start-up

I am currently running Linux (Ubuntu 14.04) and my copy of Mathematica suddenly started misbehaving. I am not sure what I did to invoke this. The splash screen when Mathematica is launched kept ...
1
vote
1answer
42 views

Coupled differential equations — singularity being reached very quickly

I was wondering if there was a way to help the solutions to these differential equations not hit a singularity as quickly as they currently do. The equations are very complex (derived from a ...
0
votes
0answers
10 views

Click required before ViewVector behaves in Graph3D (Also, how to view 3D subgraph “head on,” retaining original VertexCoordinates)

My overall goal for the following is to produce 3D subgraphs with some vertices deleted that looks "head on" at the remaining vertices, which are held in their original positions via ...
0
votes
0answers
33 views

The action of EntropyFilter on images [on hold]

The EntropyFilter effectively filters an image by replacing every value by the information entropy of the values in its range or neighborhood. I have attached the ...
0
votes
0answers
35 views

Nonlinear numerical optimization

What is the best method to obtain global minimization of the quantity $$\psi(u, v, w) = \sum_{i=1}^{n} (1-(1+(x_i-w)/u)^{-v}-i/(n+1))^2+(n-r)((1-(1+(x_r-w)/u)^{-v}-r/(n+1))^2)$$ with respect to $u, ...
9
votes
2answers
65 views

Syntax for using Tooltip in DiscretePlot

Tooltip works fine in ListPlot: ...
1
vote
1answer
47 views

“Broken” curve with ContourPlot

I am trying to plot a contour ellipse ...
5
votes
1answer
38 views

Solve a time-dependent matrix DE using NDSolve

I am trying to numerically solve a time-dependent matrix DE using Mathematica. However, it seems that Mathematica freezes even for two-dimensional matrix equations. For example, we have: ...
1
vote
1answer
30 views

StreamPlot use fixed integration time to determine final path length, not fixed path length

I'm plotting velocity fields for fluid flow, and my call to Streamplot looks something like this: ...
0
votes
1answer
97 views

Translate C++ in Mathematica 10.0.2 [on hold]

By translating the following program written in C ++ ...
3
votes
0answers
53 views

How would one return from a place of a pure function's body using Return?

From previous answers, replies and discussions it is known, while not formally documented (even in the most recent Wolfram Language Documentation Center), that Return can be used in a two-argument ...
6
votes
1answer
162 views

How do I remove roads from Mathematica maps?

I'm using GeoGraphics and Polygon[Interpreter["USState"]["Colorado"]] to create a map of Colorado and several bordering states. ...
0
votes
0answers
21 views

Problem of FileEncoding of the output file of FileTemplateApply

Problem of FileTemplateApply FileTemplateApply will change a file-encoding[UTF8] into a file-encoding[WindowsANSI], it seems it doen't accept CharacterEncoding ...
0
votes
0answers
19 views

Can Mathematica Deploy a Dynamic-3D-Tag-Cloud in one webpage

Recently I've used mathemtica WordCloud function to generate a tag picture here And there is also a JS-Version 3D-tag-Sphere below[not so good] My Question is: ...
0
votes
2answers
68 views

Making a replacement on the numerator and denominator of a rational number

It's isn't a big deal, but when I run the following I don't get the output I expect. After discussing this in the comments it appears it has to do with being an atomic expression. ...
2
votes
0answers
30 views

Unexpected behavior from Return called in a Block [duplicate]

I like to write functions that dispose of failure cases early, before they do the main calculation, but I don't like to write cascading If statements. Here is a toy ...
0
votes
1answer
53 views

Remember Plotting Command [on hold]

I used a command in another computer to obtain a surface without using any input more than the command. It returns me a surface like this: Anyone knows the command or commands that let me graph ...
0
votes
1answer
49 views

Mathematica Wont Open [duplicate]

Mathematica 10 will not open on my computer which runs Windows 8. It is stuck on the initializing kernals screen regardless of whether I try to open the program or open an old document. The problem ...
2
votes
1answer
91 views

Newton's Method Glitch

I wonder if you can help me with my program - it involves using Newton's Method but my main issue is getting a defined function to return a given value. Essentially, I want to get my function ...
-3
votes
0answers
51 views

how to write a fortran subroutine in Mathematica and then how to call it in main body of program [on hold]

I want to convert the same subroutine in Mathematica and then want to call it in main body. Please guide
4
votes
0answers
64 views

Multiple Constrained Sum

I need to perform a multiple summation, that obeys some conditions. This arises in the study of a statistical physics model. q=Exp[-β]. I would like to ask if ...
7
votes
4answers
159 views

Superimposing ListContourPlots on each other

I have two ListContorPlots that I would like to plot on top of each other for easy visualization. I tried using Overlay for ...
5
votes
2answers
71 views

How to load a file in a directory inside the current working directory

How can I use something like that NotebookEvaluate[ "Mathematica\\SomeFile.nb"]; Instead of ...
0
votes
0answers
47 views

Solving a system of non-linear equations / approximate or exact solution — either takes ages or gives non-sense

I would like to find all solutions in terms of functions F and g of the following equation $h(x)=\int_0^x F(x-y)g(y) dy$ Normally $h(.)$, $F(.)$ and $g(.)$ are continuous. But I have a numerical ...
-2
votes
0answers
33 views

Visualsinig the system of linear equation using r program [on hold]

I need the graph of the following equation in 3d x+y+z=1;x+y+z=2;x+y+z=3 how do I get the clear visualization using r programming
3
votes
0answers
61 views

Using NIntegrate and DiscretePlot to visualize pseudodifferential operators

In harmonic analysis, pseudodifferential operators are a way to generalize the notions of derivatives, through the use of Fourier transforms. The basic idea being, Let ...
1
vote
0answers
62 views

Restrict range of Functions

I have a function f[x,y,...,z] and I want to restrict its range to positive numbers only, f>0. f[x,y,...,z] is multivalued for some x,y,...,z and I cannot plot it for these values. How can I restrict ...
2
votes
2answers
51 views

Implementing BinCounts for alphabetical structures

Is it possible to implement BinCounts for alphabets such that those alphabets which fall into the group {a,b,c,d} can be counted ...
3
votes
0answers
28 views

NotebookAutoSave -> True “partially” working?

I am a novice to Mathematica (using v10.2) and was wondering why: SetOptions[SelectedNotebook[], NotebookAutoSave -> True] does not switch on ...
1
vote
1answer
50 views

Plotting multiple instances of a function defined with NIntegrate

I have a function that involves an NIntegrate, for example something like this: f[x_, z_] := NIntegrate[z*x*y^2, {y, 0, x}]; I want to plot this function for a ...
1
vote
2answers
90 views

How to determine the parameter in a differential equation with some fixed solution

Assuming that I have a ODE system with undetermined parameter $$x''(t) == y(t) x(t)$$ $$y'(t) == 2 - a x(t)$$ and I have some fixed solution condition $$x(0)=0$$ $$x(10)=8$$ $$y(10)=3.5$$ Is there ...
2
votes
1answer
49 views

Solving a consistent overdetermined linear system

Not a duplicate question. I already tried all the Answers offered for this Question and they failed, so I believe this is a different problem with Solve[]. I have ...
16
votes
2answers
778 views

Mathematica 10.0.x freezes in Initializing kernels

I updated to Windows 10 and have been running Mathematica fine on it for over a month. For some reason, it has just stopped working. I don't remember any Windows updates occurring which would have ...
1
vote
2answers
38 views

Creating a Table with a list of If statements given in a certain order

I am trying to create a conditional Table with If statements, where I move to the next condition only if the first one is satisfied, otherwise I "Break[]" and move to the next element of the table. ...
1
vote
2answers
43 views

How would one set up a conditional to evaluate at the last output value (wondrous numbers) [duplicate]

I know this is pretty fundamental, but I'm trying to learn Mathematica on my own and this is stumping me. I know 5 is wondrous and it takes 5 steps to reach one, but I can't figure out the input to ...
5
votes
3answers
70 views

How to center a graphic in its output cell

Say I have produced a single graphic ouput, perhaps a plot. Instead of displaying left-aligned in the notebook, I would like it to display in the center of the output cell. I would like it to stay ...
5
votes
1answer
259 views

I change a single constant and the simple script suddenly takes forever to complete

I writed a code to display the Dragon Curve fractal, and I reached my goal. The algorithm works by taking the previous two points and then adding the following one by making a 90 degrees turn left or ...
0
votes
0answers
24 views

How to solve PDE in 2D region with mixed boundary condition?

I'm trying to solve the inhomogeneous wave equation with mixed boundary conditions. How do I input these conditions? Is is still with NDSolve?
1
vote
0answers
34 views

Can I model the general political landscape with mathematica? [on hold]

I want to develop a website which would model a province of 2 million people from a political point of view. Is mathematica a good fit for such a project? My background is that I'm an experienced ...
5
votes
2answers
81 views

Calculate the mean of ordered distribution of the defined distribution

I am trying to evaluate the mean of the following: Let $a\sim Binom(10,1/2)$ and consider the random variable $\quad \quad d=\left|\frac{2}{\sqrt{10}}a-\sqrt{10}\right|$ Let $d_1,\dots,d_{20}$ be ...
1
vote
2answers
95 views

Convert `FullForm` to XML Structure and back

How might I create a function that converts between FullForm and a XML structuce? Ultimately I'm ideally looking to use CSS and JS to edited the XML structure. ...
1
vote
1answer
45 views

Writing a function with two functions as arguments

I am trying to write a function of two functions. A function of one function works as in h[f___, x_, y_] := Integrate[f, x] h[x^2 + y, x, y] and this ...

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