1
vote
1answer
83 views

m equations and n variables. Reducing using Mathematica

I have six equations and thirteen variables. I would like to reduce it to seven free parameters. I used Reduce to solve it but it is taking really long (one full day and no output yet) and I think ...
7
votes
2answers
477 views

How to create an adjustable Bézier curve?

I tried to create an adjustable Bézier curve with the following simple code. However the curve didn't show up. What is the problem? Please help. ...
5
votes
2answers
131 views

ToDiscreteTimeModel fails following video

Following the systems-modeling video here at about 15 min, 20 seconds in, the presenter (Bob Sanhedrick, I think) shows a model for an "Asteroids-game"-like 2D spacecraft. The model is trivial: ...
-2
votes
2answers
439 views

Use MATHEMATICA to calculate the volume of the solid [duplicate]

Use MATHEMATICA to calculate the volume of the solid that results when the region enclosed by the given curves is revolved about the x- axis. f(x)=Pi^2 Sin[x] Cos[x]^3, f(x)= 4 x^2 x=0, x=Pi/4
6
votes
4answers
3k views

Use Mathematica to calculate the area enclosed between two curves

use mathematica Hence, calculate the exact area enclosed by these curves using Mathematica. $f(x)=x^3$ and $g(x)=x^5 - 2 x^3 - 3 x$ i have got the graph...now I'm stuck with finding the area
4
votes
2answers
332 views

Approximate value for the area between the curve

I've got this task: Use Mathematica to obtain an approximate value for the area between the curve $y=1/4$ and the x-axis over the interval $[1,2]$ with $50$ subintervals using the left ...
2
votes
1answer
139 views

Typing (and executing) expressions with multiple superscripts

I am trying to type (and evaluate) expressions of the following form: $$ G^{a,b} $$ into a mathematica. I've tried the obvious G^(a, b) or ...
3
votes
1answer
377 views

Real and Imaginary parts of solutions to a complex linear ODE system

Consider a complex linear ODE system $x'=Ax$, where $$A=\left( \begin{matrix} 0&1\\ -2&-i \end{matrix}\right). $$ One can first find the eigenvalues and eigenvectors using ...
3
votes
1answer
100 views

What ProcessEstimator Options can I use with FractionalBrownianMotionProcess

I can generate an fBm process: ...
8
votes
2answers
468 views

Why PlotLegends doesn't give the legends ?

I am using Mathematica 9. The problem I have is with plotlengends, in particular, ...
5
votes
3answers
948 views

Graph and Markov Chain

I have the following code: proc = DiscreteMarkovProcess[1, {{0.6, 0.4}, {0.3, 0.7}}] Graph[{"A", "E"}, proc, GraphStyle -> "DiagramBlue"] How can I 'force' ...
4
votes
1answer
93 views

How to make DocumentationTools palette useable?

I am writing the documentation for my package using Wolfram Workbench 2. But when I open DocumentationTools under Palettes, I get this unpolished piece of junk: The top half is a total waste of ...
1
vote
0answers
367 views

Differential equations with a complex variable

Is Mathematica able to handle ordinary differential equations where the variable itself is complex? I am looking for solutions of ODE systems of the form $$\left\{ \begin{align} i\frac{da_1}{dt} ...
2
votes
2answers
431 views

Listplot imaginary part of complex numbers

I have the following list w={{0.01,99 +0.00001414 I},{0.15,6.6370108 +0.003144129 I},{0.25,3.9515722 +0.00854493297 I},{6,0.10041 +0.28132187 I}} and I want to ...
8
votes
1answer
604 views

Computing the Hurst exponent or fractal dimension of fractional Brownian motion

The Hurst exponent is related to the fractal dimension by noticing that the fractal dimension $D$ is equal to $2-H$, where $d$ is the intrinsic dimension and $H$ is the Hurst exponent, for 1-D ...
1
vote
0answers
93 views

SyntaxForm not correctly parsed by FrontEnd

When using TagBox with SyntaxForm, I noticed sometimes it is not well parsed by the ...
1
vote
0answers
116 views

CPU usage remains at 13% even after I quit the kernel

I use Mathematica 10.0.0, and after I run it for a while (a few simple commands for example) the CPU usage (Mathematica.exe) remains at 13% even after the calculations are over. I quit the kernel but ...
7
votes
1answer
514 views

Import iTunes xml data and convert it into a dataset or table

I have an xml file with song data from iTunes (https://dl.dropboxusercontent.com/u/1012958/iTunes%20Library.xml) and I'd like to import it to Mathematica to do some statistics. I get an XMLObject like ...
6
votes
2answers
646 views

Plotting spherical surfaces

I am trying to make surface plots of squashed spheres. The spheres are defined by a list of points. For simplicity, consider the round sphere: ...
1
vote
0answers
205 views

Is this the correct method in using bootstrapping to determine a lower confidence bound?

Quite often in industry, due to cost and schedule constraints, decisions must be made on small sample size data. I have 4 cycles-to-failure values resulting from running samples to failure in a ...
11
votes
4answers
562 views

Set of integers not divisible by smaller set of primes

Let $p_n$ be the sequence of prime numbers, and $s(x,n)=$ the set of integers less or equal than $x$ that are not divisible by $p_1,\dots,p_n.$ I can define it as follows: ...
4
votes
2answers
228 views

VectorPlot differences between v9 and v10

The following code displays differently with v9 & v10: ...
7
votes
2answers
355 views

Advanced SQL-type select statements (filtering) on Datasets

I'm trying to improve on mathematica's handling of datasets. I'm currently writing this function that should do the following. Suppose I have a dataset with columns, e.g. ...
8
votes
1answer
477 views

Optimizing Monte Carlo simulation of a Pred-Prey model

My assignment and code As part of an assignment for one of my classes, I'm trying to run a "massive" Monte Carlo simulation in Parallel on the follow model: ...
13
votes
1answer
470 views

Plot one set of “x” with at least three sets of “y” in different scale

I'm sorry if the question is too obvious, but I haven't been able to find a straight answer for Mathematica. I have 1 set of "x" with at least 3 sets of "y" in different scales. I need to plot them ...
4
votes
3answers
266 views

I need to remove a line from a ParametricPlot

What happens is that when I make this ParametricPlot: ...
4
votes
1answer
116 views

Is undocumented \.bd = ½ bad to use?

I want to use \.bd which leads to ½ as part of the name of a symbol in the front end (e.g. ...
8
votes
1answer
774 views

ImageTransformation: polar to cartesian

I am working on something that requires the polar transformation of some images. I implemented this transformation with ImageTransformation: ...
0
votes
1answer
121 views

Getting message DSolve::conarg:

I want to solve a simple linear PDE about $p_0$ which is a function of ξ, ζ and τ. However, the boundary condition is defined at ζ = h, which is a function of ξ and ...
2
votes
1answer
87 views

How to select elements with a specific style of a list?

Suppose I have a list: where 3 'up's of the list are red(I've made it to Cell Expression as follows). ...
2
votes
1answer
130 views

Plotting a region with thin cusps in high-definition via RegionPlot

I want a high-definition picture the real solutions $(s_1,s_2,s_3)$ of the system of inequalities $3 s_1^2 < (s_2 - s_3)^2 + 2 s_1(s_2 + s_3)\\ 3 s_2^2 < (s_1 - s_3)^2 + 2 s_2(s_1 + s_3)\\ 3 ...
7
votes
1answer
163 views

Replacing graph nodes with matrices

I would like to label a graph with matrices. Suppose the graph is simple: And I have an array mats that contains the labels for vertices 1,2,3,4 (these are just random 0-1 matrices; ignore the ...
3
votes
2answers
722 views

Mapping points on the unit circle

I have a set of points P that are evenly spaced on a square grid of length 1. I would like to map these points to the circle of radius 1 as nicely as possible, while preserving relative positions as ...
3
votes
2answers
110 views

Adding Text to a ListLogLinearPlot [duplicate]

I have a problem with adding text to a ListLogLinearPlot plot. The text just doesn't show up anywhere. If I use the normal ListPlot, the text coordinates go perfectly wherever I want them to: ...
2
votes
1answer
140 views

Correct handling of milliseconds in a date time string

DateString[{2014, 5, 7, 13, 47, 44.760}, {"Year", "-", "Month", "-", "Day", " ", "Hour", ":", "Minute", ":", "Second", ".", "Millisecond"}] Returns ...
2
votes
0answers
146 views

Conceal GUI source code

I'm working with a simple software application written in Mathematica, composing of several .nb and .m files. The application is centered around a simple mathematica GUI, which includes several ...
2
votes
1answer
115 views

Is there a reason why some specific arrangement of scattered grid points would yield bad RBF (Obtuse package) interpolation results?

I have an arrangement of grid points given by the figure below (the datagrid data is posted below at the end of the post): They correspond to electrode positions of an EEG signal. I am ...
3
votes
2answers
79 views

How to display movie without controls [duplicate]

I would like to display a sequence of images as a movie within mathematica. I am aware of ListAnimate, but I do not want the various controls included, and there seems to be no way to remove them.
6
votes
1answer
264 views

Integral of x^p

Can anyone explain why Mathematica does not return a conditional expression that handles the case of p=-1 for Integrate[x^p,x]? ...
9
votes
3answers
195 views

Problem constructing Association tables with some operators

fixed in 10.0.2 First, set up the example Dataset from the documentation: titanic = ExampleData[{"Dataset", "Titanic"}]; ...
7
votes
4answers
420 views

Speed up Schwarz-Christoffel mapping

I would like to ask your advice how to speed up Contour and Parametric plots in the following example. Let as start by defining a function ...
0
votes
1answer
221 views

Turning sound into a graph

I'm writing a comprehensive text on graphs and Mathematica and in this context I have this, let's call it, creative gap between sound and graphs. There are plenty of ways one can create graphs from ...
3
votes
3answers
665 views

Why does a certain CSV file import properly into LibreOffice but not into Mathematica 10.0?

I'm working on a project involving data manipulation and it involves working with CSV files. I know that the files are properly formatted as when I import them into LibreOffice, all of the columns ...
1
vote
0answers
217 views

SocialMediaData[“Twitter”]: no output

I decided to give the SocialMediaData functionality of MMA10 a try but it does not seem to work for Twitter. The first time I call ...
9
votes
2answers
279 views

Menu item “Interrupt Evaluation…” missing in V10

The menu item “Interrupt Evaluation…” seems to have disappeared in Mathematica 10 on OS X. Well, this is a bummer. I personally use Mathematica for very long calculations, and I was using this ...
1
vote
1answer
71 views

Why does WordData fail to find “PartsOfSpeech” when given a list of two words?

I have the following sample code. StringSplit["a test string", " "] Thread[WordData[%, "PartsOfSpeech"]] The output I get is: ...
4
votes
1answer
416 views

Fitting numerical model to experimental data

I have diffusion equation with the initial/boundary conditions: ...
9
votes
0answers
77 views

Is “MaxMessageCount” broken or is its function counter-intuitive?

Behavior remains unchanged through Mathematica version 10.1.0 As noted by kguler the Front End option: MessageOptions -> "MaxMessageCount" does not appear to ...
4
votes
1answer
99 views

How to implement something like NMaximize[ NMinimize [ f(x,y) , {x} ], {y} ]?

Title says it all, really. I want to find some set of values for which a function of those values can't be made larger than a certain number, when some other values (on which that function is also ...
1
vote
1answer
151 views

How determine The most possibility probable with programming

i have a scatter chart of probable of happen some thing like below chart link of google chart i what determine the probable The most point in below chart , can use a mathematic method to determine ...

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