-3
votes
1answer
53 views

What's wrong with this stylesheet? [closed]

I edited this style sheet: ...
2
votes
1answer
68 views

Matching a list of sequences with common form

I am trying to find a pattern that matches a list of sequences that share a common form. The sequence form is: 1 followed by zero or more nonzero integers, followed by 0. An example list is: ...
1
vote
1answer
273 views

How to import and visualize a network stored as an edge list in CSV file? [closed]

I'm extremely new to Mathematica, and I'm trying to import an edgelist representing a network, but I think I'm missing something major. Here is my process so far just to import and visualize the ...
1
vote
0answers
104 views

What is the fastest way to obtain the eigenvalues of a Wishart matrix?

I would like a fast method of creating a sample of random numbers which corresponds to the eigenvalues of a Wishart matrix: For M>N the eigenvalues \lambda_i are given by the jpd Where $K_N$ is ...
0
votes
1answer
174 views

Series expansion of a complex function

How do I expand a function $f(z)$ in a particular region? For example, how would I expand $f(z)=(z^2-3z+2)^{-1}$ in the region $0<|z-1|<1.$? I believe this can be done by the binomial theorem. ...
1
vote
2answers
99 views

How to switch between a binary number as String and a as a list of digits?

I was trying with String Functions and I viewing any posts and have no results I want to know 1.- From cromo33 = Table[RandomInteger[], {i, 1, 33}] cromo33 ...
1
vote
0answers
47 views

How to change default font? [duplicate]

Sometimes even I change the text font from arial to courier new, when a new formula cell is created, things inside become arial again. How to tackle this problem? Furthermore, is it possible to change ...
1
vote
3answers
334 views

Plot with plot markers without using ListPlot

I would like to plot a continuous function with Plot with plot markers as if it were a ListPlot plot. Simple example: I have ...
2
votes
1answer
137 views

Getting cdf content from nice Wolfram info graphic

There is a very nice cdf info graphic on the Wolfram Webpage (http://www.wolfram.com/cdf/uses-examples/infographics-full-example.html). I'd like to have a look at the code as I'd like to do something ...
0
votes
2answers
130 views

The precision of the number

I have problem in Mathematica with unnecessary rounding which is caused by high precision. For example I have value a = 2.052685846*10^-1865, when I make ...
1
vote
1answer
86 views

Why there is no SlotSequence (##) form analogical to #[[ ;; n]]

I'm aware that this may be closed as offtopic but there are people around with "offtopic" knowledge :) So, in List context we can: ...
1
vote
0answers
122 views

How to make Layer Directed Graphs (LDG) in mathematica?

I am wondering if I can make a graph like that somehow: I am new to mathematica, I tried to play with Creating a graph with variable size of vertices and variable thickness of edges . I figured if I ...
1
vote
0answers
66 views

Function behavior based on Head

I'm figuring how to implement a function behavior based on the Head of its argument. I mean ...
6
votes
6answers
545 views

Choosing $n$ equidistant points on a circle with given radius and center

I would like to have a function circle which takes two inputs: a tuple {x,y} and a real number ...
3
votes
2answers
271 views

Mapping multiple functions over an array

I am looking for an elegant way to Map multiple functions over an array. My problem looks something like this: Consider a list of functions: ...
3
votes
0answers
110 views

“Off-label use” of Mathematica functions for performance

Assisting an acquaintance with a simulation where a very large number of binomial probability calculations are required, I pointed them to a slightly obscure function to dramatically speed up their ...
1
vote
1answer
342 views

FindFit (Jacobian Error) [duplicate]

I, like others before me, am struggling with FindFit. So, I tried a simple example. ...
0
votes
0answers
52 views

Since when is a log distributed across a finite sum?

I have this: ...
1
vote
2answers
122 views

A possible error related to the evaluation of a double integral

According to the Mathematica, the integral below NIntegrate[ Log[Log[1/(x y )]] Log[1/(x y )]^(-0.5 - 1), {x, 0, 1}, {y, 0,1}] might possibly evaluate to ...
0
votes
0answers
218 views

Boundary Value Problem- using NDSolve or another method

I am trying to solve a set of coupled partial differential equations, with defined boundary conditions using mathematica. Here are the equations and the boundary conditions. ...
1
vote
2answers
112 views

Functions of two arguments

I am pretty weak on the notion of pure functions, etc. I found a clean solution to my problem so in a sense I've already answered my own question but I don't feel I'm on terra firma. I wanted to take ...
4
votes
2answers
165 views

Entering scientific notation in an InputField

I am trying to make an InputField for numeric input, but InputField[Dynamic[num],Number] Does not allow the user to type ...
0
votes
1answer
174 views

Issue with Compile

The following code works fine with the the function f defined as a module, however, when I convert it to be a compiled function, it gives me errors. Can some one ...
0
votes
2answers
161 views

Summarizing SQL Tables

data = Table[SQLSelect[conn, "All", {"col1", "col2"}, SQLColumn["col1"] == n && SQLColumn["col2"] == o], {n, 1, 8}, {o, 21, 30}]; This results in ...
0
votes
2answers
118 views

Fill below two functions.

I'm new to Mathematica and some of the filling stuff is confusing me. I don't think this should be too hard but I can't seem to get it to work. I have plotted x and -x. I want to fill below BOTH of ...
1
vote
1answer
150 views

How to calculate the following integral of the multiplication of two Bessel functions?

This integration has an analytical solution and its behavior is described by 1/r^2 function, but Mathematica gives some weird oscillating answer. Can anybody explain this and help me overcome this ...
0
votes
1answer
85 views

What is the meaning of Automatic in goodness of fit test?

I can't find what is the distribution corresponding to the default option in: DistributionFitTest[data, Automatic, "HypothesisTestData"]; Is it N(0,1), uniform?
2
votes
2answers
220 views

WhenEvent for several variables

I want to solve a system of nonlinear two differential equations (say, in $\theta(x,t)$ and $\phi(x,t)$ with NDSolve, but I want to stop the evaluation when one of ...
0
votes
2answers
93 views

Setting CheckboxBar defaults under Manipulate

How is the default for the checkboxes created by CheckboxBar in a Manipulate set to be checked instead of unchecked? (The ...
1
vote
2answers
118 views

Error Trapping Complex Infinity Error due to Divide by Zero in Manipulate

I want to use a Manipulate that has two controllers that end up as a difference in the denominator of an expression. It is easy enough to set up the initial ...
1
vote
1answer
73 views

Moving the start of a graph to the right, finding maxima in an oscillator

I have the following code written to simulate a driven damped oscillator ...
0
votes
1answer
70 views

How to compile gather [duplicate]

First question,How to Compile this? gather[data_]:=Gather[data, Mod[#1, 3] == Mod[#2, 3] &] I dont know why this is wrong. ...
0
votes
1answer
348 views

Trying to solve a transcendental equation involving bessel functions

I've never used Mathematica before and am trying to numerically solve equation (12) from this paper: http://arxiv.org/abs/hep-ph/9907218v2. Ideally I'd be able to find the smallest value of $x_{n\nu}$ ...
19
votes
2answers
647 views

How to make a curve selectable from a scaned image and convert it to a list of coordinates

I have a scanned image (binary-ized): Is there any way to reduce one of these curved lines (full or dotted) to a series of its coordinates (e.g., sampling interval of 0.01 on x-axis)? I've read ...
2
votes
2answers
175 views

Set PointSize to pixel size

I have a set of 1million 2D points and I would like to produce an image 200x200 pixels where each point will have the size of a pixel (no more). Additionally each point may repeats several times so I ...
1
vote
0answers
107 views

What are the hidden specifications for FindRoot

The Help page of FindRoot says: "by default, FindRoot uses Newton's method (Newton-Raphson) to solve a nonlinear system" (or a nonlinear equation I ...
3
votes
3answers
281 views

Data Table Manipulation

Suppose that I have the following ...
2
votes
1answer
89 views

SQL Queries with the Table function

Given the following connection to an SQL query works but the data comes out wrong: ...
0
votes
1answer
95 views

How do I apply a rule to every element in a matrix? [closed]

I need to apply a set of rules (I used Which) to every element in a matrix, but the rules are dependent on the position [[i, j]] ...
3
votes
3answers
174 views

FindRoot constrained to maximum

I am using FindRoot to find the local maximum op some function, by examining where its derivative is zero. However, keeping the starting value the same, sometimes ...
2
votes
1answer
103 views

Accessing Draw Tools objects with notebook commands

In a notebook I would like to be able to access and modify the properties of draw tools objects after I've drawn them on a graph by hand. For example, if make a plot and, with draw tools, make a ...
0
votes
0answers
16 views

?AspectRatio? setting to obtain equal length pr pixel on all axes [duplicate]

Like these does: Show[Graphics[Rectangle[{2, 1}, {15, 2}]]] ParametricPlot[{t,t t},{t,0,2}] how do I create a Plot[] with ...
1
vote
0answers
72 views

Mathematica exit when calling plot. Bug?

I'm currently studing the behaviour of some integral for which I cant find an analytic solution. As this function depend on a vector on the unit sphere, I first defined it with 3 parameters before ...
2
votes
1answer
233 views

How to use the function ImageCorrelate? [closed]

I am a beginner in using Mathematica, know little about optics. However, I would like to know how to understand the function ImageCorrelate, since the ...
1
vote
1answer
305 views

Why does Mathematice dislike my boundary condition in NDSolve?

im trying to solve a PDE-System, with the "periodic boundary condition" c[t,0]==4*c[t,2pi] But mathenmatica says: NDSolve::bcedge: "Boundary condition ...
6
votes
3answers
422 views

Mathematica style (drawing cubes)

I wanted to draw (lattice-aligned) unit cubes inside a sphere with a given radius centered on the origin, so I wrote this program: ...
2
votes
2answers
507 views

Solving simultaneous exponential equations

In[1]: Solve[{(1 + k)^n == 0.6, (1 + k)^(n + 1) == 0.3}, {n, k}] Solve::ifun: Inverse functions are being used by Solve, so some solutions may not be found; ...
4
votes
2answers
425 views

How to transform transfer functions into differential equations?

is there a way with Mathematica to transform transferfunctions (Laplace) into differential equations? Let's say I have the transfer function $\frac{Y(s)}{U(s)}=\text{Kp} \left(\frac{1}{s ...
0
votes
0answers
34 views

Using Map with functions that take a parameter [duplicate]

I have a list l={{0, 0, 0, 3}, {0, 0, 0, 3}, {0, 0, 1, 2}} And I would like to obtain the number of zeros in each sublist: ...
2
votes
2answers
451 views

Removing trailing zeros from a list

If I have a list like list1={2334.,342.,0.,0.,2322.,0.,0.,0.,0.,,,,,,}; it's easy to remove to trailing blanks with ...

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