1
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1answer
90 views

Generate $n$ randomly oriented non-intersecting cylinders with fixed radius and length

This post is in reference to the previous question here. How could I adapt the solution given to have the following constraints: fixed radius, fixed length, number of cylinders, and within a ...
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1answer
46 views

Apply Grad and Mod to Matrix

Let f:=x^3+y*x*z+z^3; Let mat = {{2, 2, 2}, {3, 1, 7}, {1, 6, 3},{4, 5, 1},{0,4,9}}; be a list of points . I want to compute ...
1
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2answers
119 views

Output of a Print in a list

I'just starting with Mathematica and therefore I was having a small question. It must be somewhere on Internet but I can't find it. My question is the following. I would like to get my values after ...
1
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3answers
142 views
1
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0answers
50 views

Two issues about Underline(d)

From the Help Browser Style["abcd xyz", FontVariations -> {"Underline" -> True}] abcd xyz The text is NOT Underlined, contrary to the online version Also ...
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2answers
142 views

Partitioned matrix operations

I have a $(2 \times 2)$ matrix whose elements are themselves $(2 \times 2)$ matrices (i.e., a partitioned matrix), e.g: $$ M = \begin{pmatrix} A & B \\ C & D \end{pmatrix}, \quad \quad ...
1
vote
1answer
132 views

Why isn't Mathematica reducing my result to a number? [closed]

I do not understad why the program do not show the number values. Even when I use N[xx]. How can I simplify this?
1
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1answer
73 views

Graph of second order polynomials [closed]

As I mentioned before, I want to write a notebook for teaching graphs of second order polynomials that shows discriminant and the conditions when a>0, a<0, having real roots, having no real roots. ...
1
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1answer
189 views

Import camera parameters and data from *.sif image files? [closed]

By default, Andor's line of scientific cameras saves data in an apparently undocumented *.sif format. Are there any Mathematica packages or code that can help import these data? I've inherited an ...
1
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1answer
69 views

Calculations after NumberForm [duplicate]

As specified in documentation center the functions AccountingForm, NumberForm, etc. are useful only to display numbers in ...
1
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0answers
47 views

Why insert menu shortcuts sometime run other actions? [duplicate]

I am new in Mathematica. I am wondering, why insert menu shortcuts, like ctrl + ^, or ctrl + _ sometimes result in another ...
1
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0answers
94 views

Possible bug with Manipulate [duplicate]

Bug introduced in 10.1.0 and fixed in 10.2.0 I am observing a potential bug not present in MMA 10.0.1.0 on Win 7 Ultimate, but observable on MMA 10.1 on Win 7 Enterprise. It seems to work with ...
1
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0answers
139 views

How can I protect my notebook file with a password to open and save changes?

I want to protect my .nb file with a password, because now I'm using a free access computer in my university. Everybody student in my university can use that computer and I do not want my .nb file can ...
1
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1answer
116 views

How to speed or help Solve[] when it is stuck?

The code below generates a system of equations that I need to Solve[] for {c[5], c[6], c[7], c[8]} in terms of {c[1], c[2], c[3], c[4]}. ...
1
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1answer
63 views

Table of sections with CellPrint

I am trying to produce a table of sections with each section containing a DynamicModule. My two questions are: (1) How do I produce grouped sections that are folded ...
1
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1answer
186 views

Plot x and y ErrorBars from file

If I have a set of data like this one saved in a txt file ...
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0answers
149 views

How do I fit the parameters describing a 3D object so that it best resembles its projection seen by an observer at a particular position?

I have data which are the longitudes (l) and latitudes (b) for the vertices of the edges of a shape as it appears to an observer at a given location (i.e., as it appears on the observer's sky plane). ...
1
vote
1answer
455 views

How to plot a 3D surface from an Excel matrix, using column and row headers as axis labels

I am trying to use Mathematica to plot a surface chart similar to the ones that are created from Microsoft Excel. The point is to be able to easily colorize and manipulate the plot by free 3D ...
1
vote
1answer
53 views

Module and Manipulate: Why the Red Highlighting? [duplicate]

If I define a function that returns a Manipulate object, and the Manipulate has a local variable inside of it, the local ...
1
vote
1answer
312 views

Create hexagonal mesh on 3D Parametric Plot and 3D spheres?

I am looking to put a cool geometric mesh on this object. I came across this question that explained how to put a hexagonal mesh on a parametric equation but I have a series of geometric objects of ...
1
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2answers
146 views

A shortened association

...
1
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1answer
145 views

How to change the radius markers and number of concentric circles in a polar plot?

I'm using PolarPlot to plot a function in [0, 1] in a log scale plot, capped at -40 dB, as in the following example: ...
1
vote
3answers
207 views

How to manage list of list of rules?

Considering we have a list: str = "{1 -> {a -> aa, b -> bb}, 2 -> {2a -> \"{b -> bb}\"}}" Bringing this to expression gives: ...
1
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1answer
71 views

RunScheduledTask and return the result

I created a task that removes itself when an external variable x,is changed: ...
1
vote
2answers
146 views

Strange evaluation of an sum involving binomial coefficients

I stumbled upon this problem while playing with Mathematica 10. Can anyone help me explain the following behaviour? I define a sum ...
1
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1answer
243 views

Combining Mandelbrot and Monte Carlo

I'm trying to combine plotting a Mandelbrot set with Monte Carlo randomization to plot an equation using random points for complex number z, for the function $z^3-2z+2=0$. Below is the code I have ...
1
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1answer
272 views

Slow evaluation of NIntegrate when used as a pure function

I asked a perhaps related question here. Here is my code in below. The goal is that to define a function which must be integrated numerically. The function itself first is calculated over different ...
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vote
1answer
120 views

How to draw dots at beginning and end of range when plotting [duplicate]

I'm trying to plot a Piecewise function which should look like this: How can I have similiar dots (filled or empty) at beginning and end of range? ...
1
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3answers
134 views

How I create a 'TraditionalForm' expression in which only parts are evaluated?

I have an expression for the form Subscript[W, f[a, b]][c] = ρ^f[a,b]ω[c]ρ^-f[a,b] that I want to render in TraditionalForm ...
1
vote
1answer
107 views

Solving equations using algebra [duplicate]

Has anyone ever solved an equation for students using algebraic steps? For example, you start with the equation. 2x+3 = 5 Then you show subtracting 3 from both ...
1
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0answers
123 views

Simulations using alternative initial conditions

With help from some of you guys here in this forum, I have developed the following code, which works perfectly. My questions are: how to automate the simulations with varying initial conditions. In ...
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2answers
180 views

Showing an output without square brackets

Suppose that an output is which could be obtained from, for example, D[f[x, y, z], x] / D[h[x, y, z], x] I'm looking for a way to show it without the square ...
1
vote
1answer
75 views

Implementation of a recursive function [duplicate]

I have been trying to implement a recursive function, but still struggle. Here's what I have written: ...
1
vote
0answers
115 views

Export to PDF file and use in latex, weird behaviour from using Acrobat

I have put all files here. All pictures are Exported from Mathematica 10.0.1 X64 (win7) using Export["filename.pdf",plotobject]. I first complied the latex file, ...
1
vote
1answer
86 views

Formatting output for readability

I would like to suppress the argument [0, 0, 0, 0] of K in the output of ...
1
vote
1answer
257 views

Inverse Fourier transform

I am dealing with an inverse Fourier transform of a sampled complex function, $H(\omega)$. I want to obtain a real transformed function $h(t)$, which means that $H(-\omega)=H^{\ast}(\omega)$ has to be ...
1
vote
1answer
538 views

How to add an extra column to a current matrix (list)? [duplicate]

a = {{-800, 1712}, {-801, 1713}, {-806, 1832}} TableForm[a] b = a[[All, 2]] - Min[a[[All, 2]]] How do I make a new matrix (list) whic looks like this ...
1
vote
1answer
182 views

How to combine manipulate and eventhandler

I combine manipulate and eventhandler, now I can change the controller when working on eventhandler, but how to change the value in eventhandler when I control the manipulate controller? ...
1
vote
2answers
138 views

Integrate full derivative

I want mathematica to do Integrate[D[f[x],x], {x,0,t}] and achieve the answer f[t]-f[0]. But Mathematica doesn't intergrate ...
1
vote
1answer
177 views

using Module in NDSolve

I am trying to solve a set of two wave equations where solution of first equation defines initial conditions for the second one. And I would like to use Module to define those equations as a function ...
1
vote
1answer
77 views

Different distance in .jpg plot and .eps

I noticed that when I run my code to draw a plot: ...
1
vote
1answer
204 views

NDSolve inside Module with local variables

I want to use NDSolve within a Module and output the solution at some times. (Mathematica 10) All works fine with global variables (symbols) ...
1
vote
1answer
158 views

Exporting to a single spreadsheet in excel

I would like to export the output to excel file. But when I exported,for each value $q$ I am getting a different sheet. Can someone help me how to export it to a single sheet of an excel file. Thanks ...
1
vote
1answer
138 views

Series expansion of InterpolatingFunction obtained from NDSolve

I am trying to obtain a series expansion of the numerical solution of a differential equation. I encounter difficulties going beyond first-order expansions which I believe might be due to my inability ...
1
vote
1answer
209 views

Solving systems of equations

So I have a set of equations like 12 of them but 13 variables. However I would like to find the numerical value of the roots for the maximum value of a particular variable. I don't know how to do that ...
1
vote
1answer
114 views

Applying N to the roots found by Solve gives complex numbers when the roots are real [closed]

I have a function which is f(x) = x^3 - 5 x^2 - x + 1. When I solve for x to find the zeros ...
1
vote
1answer
95 views

How to checkpoint computations?

Suppose I do some big experiment, presumably in a Table[], or a ParallelTable[]. Experience shows that there is a non-zero ...
1
vote
1answer
98 views

FindProcessParameters for Fractional Brownian Motion Returns Error

I have the following data: ...
1
vote
1answer
157 views

Under what conditions does Mathematica give a natural antiderivative when integrating?

Natural antiderivative is defined as follows, using Fourier transform: $$f^{(-1)}(x)=\frac{i}{2\pi}\int_{-\infty}^{+\infty} \frac{e^{- i \omega x}}{\omega} \int_{-\infty}^{+\infty}f(t)e^{i\omega t}dt ...
1
vote
0answers
300 views

Developing easy code to apply Delta Method to generate prediction bands for custom distributions

I think that this is an interesting issue for all those who when to not only adjust one prediction function, but also to obtain the prediction bands to asses the graphical or tabular error I'm trying ...

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