0
votes
0answers
10 views

how to install LoopTools in windows? [on hold]

LoopTools offers three interfaces, Fortran, C/C++, and Mathematica. I have downloaded the package and now, I want to install it in windows 7, in the guide manual they said: Execute the following ...
0
votes
0answers
6 views

NDSolve giving the wrong solution?

I'm considering the non-linear second order ODE DE $=0$, with DE given by ...
0
votes
0answers
15 views

ParametricPlot3D Plotting empty Graph [on hold]

I am trying to plot a position function r(t)= sin (2[Pi]t)i + (t^3)j +cos^2 (2[Pi]t)k by inputting ParametricPlot3D[{sin [(2 [Pi]t)], t^3, cos^2 [(2 [Pi]t)]}, {t, 0, 2}] into Mathematica 10.0. ...
1
vote
1answer
62 views

How to cartoon your face

I am trying to use Mathematica to general a cartoon of face. For example some thing like this: I think it can be done using MMA but I really don't know how to do it. how can it be done and how far ...
0
votes
0answers
28 views

Not getting proper x-values in a ListPlot [on hold]

I have a table of data points to be subtracted by another table of data points. I have succeeded in subtracting the y values of each data point successfully, but it is the x values of each data point ...
3
votes
1answer
102 views

How to make a 3D topographic globe?

I've made some attempt with this dataset of elevation. But I have some trouble with ListSurfacePlot3D, which can not show the globe correctly: And I've checked that the data is out of problem, ...
5
votes
1answer
19 views

How to use SparseArray in CUDA?

Sparse arrays are widely used in many scientific applications where memory and time are strictly limited. For a considerable speedup one can use CUDA. Since Mathematica 8 we can conveniently use CUDA ...
0
votes
1answer
19 views

Verify positive definiteness using random numbers

I wish to verify whether T'T - IdentityMatrix[2] is always positive definite for a certain choice of elements of T'T. ...
0
votes
0answers
33 views

How can I eliminate infinite error messages from “Solve” function with multiple linked functions?

I am trying to extract four solutions from four equations which are linked together. I am using the "Solve" function with 4 equations and 4 unknown variables to solve. I have created the function to ...
1
vote
1answer
36 views

how to depict a network with a legend

Because my network nodes have real world names more than a few characters long, I'd like to label them with a shortcut, e.g., n1, n2, n3, ..., and put a legend on the side something like this: n1 - ...
-3
votes
4answers
94 views

Mathematica's equivalent to the Python's Zip command in List-comprehension?

What is Mathematica's equivalent to Python's ZIP command? Is this called nesting? It means iterating over sub-sets of values like the below example. How can I do it in Mathematica? Example in Python ...
0
votes
0answers
25 views

getting vertices in order from spanning tree

I've got spanning tree for some weighted graph (edges labeled 1-6) - for example: ...
0
votes
1answer
13 views

Right data format when EmpiricalDistribution expects “Rectangular Array”

I have the following code to generate random data (these are the eigenvalues of a non-central Wishart matrix, and I am interested in their distribution). m = 2; n = 3; nonce = {{1, 0}, {0, 0}, {0, ...
0
votes
0answers
31 views

finding Hamiltonian path in graph (using new Mathematica graph capabilities)

I have weighted, undirected full graph (generated from points in R^2), where weight between every two vertices are euclidean distance between corresponding pair of points. What I'm trying to do is ...
0
votes
0answers
29 views

The “Save” under “File” and “Undo” under “Edit” do not work in Mathematica 10.0

Each time I click "Save" or "Undo" button from the notebook menu, some new notebook window similar to this pops up: And the file is not actually saved or the last step is not actually "undone". Is ...
7
votes
3answers
390 views

Creating a foggy image

I want to create foggy images like this one (produced with Adobe Photoshop): Not at least familiar with Mathematica's Image processing capabilities, the only ...
0
votes
1answer
38 views

Save value computed in the loop and delete it

I am using For loop to calculate a value $z$ in every cycle. I would like to create a text file, save the current value $z$ in this file and afterwards delete the value from Mathematica's memory. I ...
-1
votes
1answer
48 views

NMinimize ignoring conditions imposed on solution

I have to solve a problem about Linear Programming (optimization) which is stated as follows: Minimize: 0.75x + 0.5y + 0.15z Conditions: x > 0 y > 0 z > 0 35x + 0.5y + 0.5z >= 0.5 60x ...
0
votes
1answer
52 views

FindMinimum and NMinimize to solve equations

I know that I'm not a Jedi in solving Equations and minimizing functions; but now I've this problem, and the solution is far to me. I want to solve this equation: ...
0
votes
1answer
89 views

How smart is Solve? Figuring out what tricks I should try

I'm trying to solve a large system (~10000) of linear equations using Solve, but the process keeps failing. As-is, I don't know whether it's failing because it's using too much memory or too much time ...
2
votes
1answer
104 views

An intuitive way to form an augmented matrix

Given an $m\times n$ matrix $A$ and a $m\times 1$ vector $b$, what is the most "intuitive" way of forming the augmented matrix $[ A\ b]$? The most concise way that I know of is ...
6
votes
4answers
156 views

Combining solutions while solving

Here is a simple representation of my problem. I want to solve Solve[(w^2*c^2 /. #) - 1 == 0, w]& /@ {{c -> 1}, {c -> 2}} ...
1
vote
0answers
42 views

NDSolve Wave Equation - Triangular Wave Pulse Inital Condition

I am trying to solve a simple damped wave equation with transparent boundary conditions with triangular shaped piecewise function as my initial condition. I understand that there are issues with this ...
0
votes
0answers
42 views

FindFit with PolyGamma function

...
10
votes
2answers
130 views

How to restore function attributes to default

Adding an attribute to a function is easy and clearing attribute is easy also. But I don't know really how to restore the attributes of a function to its defaults. All I do is quit the kernel or close ...
7
votes
2answers
71 views

Export textanalysis to pdf

In the helpfile there is a nice axample of text analysis (example/LexicalAnalysis) ...
1
vote
1answer
51 views

Can I use the values of interpolating points from NDSolve's output? And How?‎

The output of NDSolve is a (list of)InterpolatingFunction(s). In standard output format the ‎elements of interpolation are not ...
1
vote
0answers
66 views

Elementwise operation, part deux

There are many answers to this question: which are forms of Mathematica's map, but languages like Scheme (I think also Python in recent years) also provide a ...
2
votes
2answers
61 views

ListLinePlot scientific notation in y axis

I am working with mathematica 9.0 and I want to make a plot importing data from a .dat file. My issue is that I don't know how to show y axis in scientific notation. My values run from 0 to approx ...
1
vote
1answer
44 views

Counting number of trues in If condition inside a For loop [on hold]

I want to count number of trues in an If condition inside a For loop of some 10k iterations. I will be happy if you suggest me some command.
6
votes
0answers
72 views

Is there a CDF Player for Mathematica 10?

The download page for the CDF player http://www.wolfram.com/cdf-player/, only shows version 9.0.1, which shows an error message when I open CDFs created with V10.
3
votes
1answer
53 views

Computing kernels of a matrix in distinct cases

I have the following matrix: ...
1
vote
2answers
29 views

Listplot x axis - Using tranpose of two tables?

I'm trying to augment the x axis of a listplot to fit the number of steps. Secondly, since there are a large number of steps (50), there will be 50 ticks which will make the graph messy. How do I get ...
1
vote
0answers
30 views

Symbolic computation under certain assumptions

Assume that I have a matrix $M$ and I'm doing some operations on it. Is there a way to specify that two variables satisfy an equation say $x=y^2$ and then let Mathematica compute under that ...
1
vote
0answers
35 views

Steps in row reduction? [on hold]

I have a fully symbolic matrix that I'm row reducing. Looking at the end result, I see that Mathematica must have divided out some common factors for each row. However, I need to analyze those ...
0
votes
0answers
41 views

Output from LinearModelFit not showing entire result [on hold]

I used LinearModelFit to estimate a data set using six variables. The output gave ...
1
vote
1answer
84 views

Is this integral solvable?

I am trying to solve the below mentioned integral. Is it possible to solve this with mathematica. If not, can I get an approximation for this by introducting the variable not to take certain values ? ...
2
votes
2answers
248 views

How can I get this sum?

I want to sum the following numbers. At present I am calculating my sum as follows. a = 10^20 + 10^30 + 10^40; In the above case, if I want to add 100 or more ...
1
vote
1answer
59 views

ListContourPlot3D blank box?

I have a (long) list of {x,y,z,f} values generated using a finite element software package. I've tried using ...
4
votes
3answers
196 views

Element-wise list operation on list of lists

Suppose a function F operates on list A: $$A=\{a_1, a_2,\cdots, a_n\}$$ I have a list of lists, B: $$B=\{A_1, A_2,\cdots,A_m\}$$ Is there a syntax to specify that F should operate on members of B, ...
5
votes
2answers
106 views

Different results of a definite integral $\int_0^{\cosh ^{-1}(a)} \frac{1}{\sqrt{a^2 \text{sech}^2(x)-1}}\, dx$

Edit The define integral is solved using substitution method as Dr. Wolfgang Hintze says like this. $u$ =$\frac{\cosh ^2(x)-1}{a^2-1}$ $dx$ = $\frac{\left(a^2-1\right)}{2 \sinh (x) \cosh (x)}du$ ...
1
vote
1answer
64 views

Dirac Gamma matrix Algebra in different dimension

Do anyone know if we could do Dirac Gamma Matrix Algebra by FeynCalc with Gamma Matrices defined in different dimension than 4, e.g. DiracTrace of gamma matrices in 2+1 dimension? Thanks!
2
votes
2answers
74 views
0
votes
0answers
40 views

How to remove error at large time in NDSolve

I am kind of amazed by the fact that Mathematica V9 can't solve a linearly damped wave equation at large time t=200 while Mathematica V8 does without giving me a huge deviation. Intuitively, an ...
2
votes
1answer
42 views

Parallelization and evaluation of random number generation

Suppose I have the following functions: ...
0
votes
0answers
26 views

Using a slider for a logistic growth parameter [on hold]

I have a differential equation $dy/dx$=$bP(C-P)$ for which I've already determined a reasonable value for C. I'd like to make a slider for b. How would I do that?
1
vote
1answer
107 views

Mathematica spitting code back when using Resolve over a large range of interest

I've just started using Mathematica and have encountered my first issue. Below are two commands which only differ in the range of values I am asking Mathematica to check. The first works fine, but the ...
2
votes
3answers
88 views

How to change the filling color under a plot according to a value?

Mathematica has an option to fill the space under a curve with a value: ListLinePlot[Transpose[data][[1]], Filling -> Axis] I have a dataset ...
0
votes
1answer
66 views

Transform Spherical coordinates to Cartesian? [on hold]

I want to transform radius=716, azimuth=120 degrees and inclanation=14.1 degrees to Cartesian coordinates. How can I do it? Trial, erroring... ...
7
votes
0answers
43 views

math.exe vs wolfram.exe vs MathKernel.exe vs WolframKernel.exe (running scripts on Windows)

I generally consider Mma documentation very good. However, it is startlingly difficult to find useful information on running Mma batch scripts, especially on Windows. So ... just what would I enter ...

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