0
votes
0answers
12 views

How to find this limit correctly?

How to find the limit Limit[n*Sin[2*Pi*Exp[1]*n!], n -> Infinity] ? Mathematica 10 outputs ...
0
votes
0answers
16 views

sloving system of 9 differential equations with Im & Re parts

I try tho slove of 9 differential equations and I try to slove it in 2 way, and both of them give me the same error NDSolve::pdord: Some of the functions have zero differential order, so the ...
0
votes
1answer
27 views

What's the difference between this differentiation? [on hold]

I've tried to evaluate a sum and get a result in terms of Zeta function. And I have results in two forms: ...
1
vote
1answer
25 views

Implementing local variables of a recursive function with either Module or Block

First, some quick background: I have been eagerly learning Wolfram and Mathematica for two months now, and along the way have written about 250 pages of teaching material that has ballooned into a ...
3
votes
1answer
28 views

Parallelizing sparse array construction

I have a very large sparse array, and the computation of individual matrix elements is fairly expensive. The Matrix is Hermitian and traceless, so I would like to construct only the sub-diagonal ...
2
votes
1answer
41 views

Driven SHO - amplitude of steady state motion

I am (partly as an exercise to understand Mathematica) trying to model the response of a damped SHO to a sinusoidal driving force. I can solve the differential equation with some arbitrarily chosen ...
0
votes
0answers
13 views

NonlinearStateSpaceModel: Trying to parse the documentation

I am trying to follow the documentation on NonlinearStateSpaceModel here, and the first basic example throws me for a loop. It says it's defining the nonlinear ...
0
votes
0answers
33 views

Symbolically solving a system of nonlinear equations

I am trying to solve the following system of equations and did the following ...
1
vote
0answers
38 views

How to evaluate sums that have 0^0 = 1

In my code: ...
0
votes
1answer
54 views

Find the solution of A^2+AB+B^2 = f(a,b,c)

I wanted to ask the following question: I need to find the solutions (a particular one is enough!) A and B of the equation $A^2 + AB + B^2 = (a^2+ab+b^2)(c^2+cd+c^2)$ How can I do it? Thank ...
3
votes
0answers
25 views

Suggested Settings for Mathematica over X11/SSH Tunnel

I am happy to discover that I can run a Mathematica session tunneled over SSH. However, as expected for X11 applications over the network, Mathematica's GUI does not have the responsiveness that I ...
1
vote
1answer
54 views

Add to the last digit a number

I have data from a Multimeter that has a precision of 0.6%rdg+4dgt. So i want to take the last digit of, say, 12.007 and add 4 to the last digit like ...
3
votes
1answer
102 views

Is there a bug in the Part function of Mathematica 10?

I am using Mathematica 10 now. I typed code below {{1, 2}, {2, 4}, {3, 6}, {4, 8}}[[;; , 1]][[1]] and this gives result 1 ...
3
votes
2answers
152 views

Order of eigenvectors

I have a matrix A = {{5, 4, 2}, {4, 5, 2}, {2, 2, 2}} The eigenvalues are 1, 1, 10 and I need to find the eigenvectors. ...
4
votes
1answer
80 views

Understanding `Paste` and how to get a string from the Clipboard to use with `ImportString`

Trying to work on this question I got distracted by my first naive attempt of copying the data and then typing dat = ImportString[Paste[], "Table"] ...
2
votes
1answer
62 views

Importing High Precision (22 digits) data from a file

I want to import list from a file and I am using ReadList but my data is in format like this 8.2457409790900004e+08 but it i being imported like $8.24574*10^8$. Is ...
2
votes
0answers
22 views

Importing FITS file from HEALPix

I am trying to read FITS file created by HEALPix software. The file contains a spherical map of a scalar field. There is the online support on how to use the file in IDL, but not for Mathematica. I ...
2
votes
2answers
71 views

Timeline plotting: horizontal bars of time intervals

This text file logs the time that a process (identified by a number) changes state ("Brown", "Blue" etc.") ...
1
vote
1answer
65 views

3D Contour Plot - parts with gradients less and more than zero

I'm trying to plot sections of the 3D Contours, with gradient less than zero, and more than zero and equal to zero. It manages to solve for the derivative, but when I apply the conditions ...
9
votes
1answer
358 views

How to create a neon light effect in Mathematica?

I tried to use Glow to create a neon light effect on a torus object. The result shown on the left of the picture below looks quite different from the real one on ...
0
votes
0answers
26 views

Can I convert a palette into a toolbar?

I have a simple cell editing palette that makes things like toggle "Editable" or "Initializtion Cell". I would like to make this become a toolbar, but cannot find anything that does it. The closes I ...
-7
votes
0answers
29 views

Resume Parsing algorithm [on hold]

Which algorithm using for Resume parsing algorithm. for capture candidate name, skills,experience,..etc how extract required information from resume?... how to do program for this problem?... ( ...
3
votes
1answer
75 views

PDE with Stefan Conditions, a.k.a variable boundary

I want to solve the one-dimensional one-phase Stefan problem, but I don't know how to make Mathematica understand the conditions. If you are not familiar with what I'm asking please refer to this ...
-2
votes
0answers
20 views

Matrix multipication [migrated]

Is this matrix multiplication is possible? Microsoft mathematics gives me a answer for it? How it could be a correct? If we need multiple two matrix, number of rows and columns should be equal. So how ...
1
vote
1answer
51 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 ...
4
votes
2answers
220 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. ...
3
votes
1answer
48 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
92 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
3
votes
4answers
393 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
2
votes
2answers
151 views

approximate value for the area between the curve

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 endpoint, midpoint and right ...
1
vote
1answer
30 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 ...
1
vote
1answer
51 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
57 views
7
votes
2answers
162 views

Why PlotLegends doesn't give the legends ?

I am using Mathematica 9. The problem I have is with plotlengends, in particular, ...
4
votes
3answers
412 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
46 views

Finding minimum value of an integrated function over an interval [on hold]

I am novice user of Mathematica and I am stuck with this question. I have to find the minimum value for this expression. where x[1,3]. I figure that to find the minimum I just need to ...
2
votes
1answer
43 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 ...
0
votes
0answers
56 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
93 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 ...
0
votes
0answers
34 views

Data acquisition from NI USB-6008, NI-DAQmx

I want to connect an interface from National Instruments to Mathematica in mac, i already download the driver Ni-DAQmx_Base_3.6 from NI page. How to tell Mathematica to dump data from the interface?
-1
votes
0answers
61 views

Dsolve implicit solution to a Differential Equation [on hold]

I would like to know if there is a form that Mathematica can give me the implicit solution to an ODE. When I use Mathematica of Alpha it it always seem to solve it for y (the dependent variable) but ...
5
votes
1answer
113 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 ...
0
votes
0answers
49 views

Approximate the largest and the smallest values of the integral [migrated]

How do I solve this:approximate the largest and the smallest values of the integral for
1
vote
0answers
62 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
62 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 ...
3
votes
1answer
74 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 ...
5
votes
2answers
249 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: ...
0
votes
0answers
59 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 ...
9
votes
4answers
410 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: ...
0
votes
0answers
55 views

Frame ticks not showing in ListLogLogPlot [on hold]

I want to make the following plot: ...

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