7
votes
1answer
680 views

Simulated Annealing Convergence

I am using Simulated Annealing method for a simulation based optimization of a process that has 3 variables, using NMinimize. I print the input/output during every ...
3
votes
1answer
91 views

Why is left NumberPadding always applied in NumberForm?

I would like to display numbers like 9.0001 and 10.0001 in the fixed-width form of xx.xxxx. ...
0
votes
0answers
54 views

MathLink wrapper for NIntegrate

I wonder if I can benefit from the Mathematica numerical quadrature routines in a way which integrates completely into an existing C-program. To be more specific I have C-program which does numerical ...
0
votes
1answer
198 views

PDF for Gamma Distribution not what I expect

I have plotted the the PDF for a Gamma Distribution with various parameters (e.g. 3 and 5) using Manipulate: ...
0
votes
1answer
100 views

How to plot the output of a calculation with a changing variable

The following code successfully manages to plot the cross-section, and give me the maximum depth of a weld pool, for a given set of parameters. What I would ideally like to be able to do is to plot a ...
6
votes
3answers
967 views

Understanding Bilinear ImageResize

In trying to understand basic image transformations, I have attempted to code my own image resize function that uses bilinear interpolation. I checked my work against Mma's ...
2
votes
3answers
362 views

How to transpose unequal lists

As the titel says I want to transpose a matrix containing rows of unequal length, to be able to transport them to excel (in row form, there are too many datapoint to write them in a cell. In another ...
2
votes
2answers
576 views

Fast way to extract data from a list

I used data=Table[{i,f[i]},{i,1,n}] to produce a list, here n is greater than 2^20 = 1048576. The function f(N) runs in time ...
2
votes
1answer
78 views

How to dynamically update a variable by using mouse over?

I want to extract the Graphics type when I hover my mouse over an object, but I failed to do so. Below is the code I am working on. Any suggestions are welcome ...
3
votes
1answer
150 views

Is it possible to show Tooltips in a ListPicker menu?

Is it possible to show Tooltips in a ListPicker menu? This effect is possible using TabView, but I would much prefer using ListPicker. Below is a simplified version of my code. ...
19
votes
1answer
445 views

Object differentiation in image

After purchasing a box of alphabet pasta for the kids, I wondered if there was way to extract the frequency of appearance of letters in the box by taken a sample and the analyzing the picture. ...
2
votes
1answer
148 views

Expectation of GeometricBrownianMotionProcess

I am trying to compute $$\mathbb E\left[\max\left(\frac{S_{1/2}+S_1}{2}-K,0\right)\right]$$ where $K=100$ and $S_t$ is a geometric brownian motion (with $S_0=100$, drift $r=0.05$ and volatility ...
0
votes
1answer
170 views

Trouble with NMaximize

I am having trouble with maximizing a function I am interested in. Below is the code I am using. ...
3
votes
1answer
210 views

How can I selectively trigger computations in Manipulate?

I have a Manipulate that uses RandomVariate and Random that I would like to have redraw and ...
4
votes
1answer
611 views

Using Mathematica in Conjunction with LyX. Path Issues?

I am attempting make life easier, and, instead of using Mathematica at the same time that I'm using LyX (a front end for LaTeX), I was hoping that I could just use LyX and use the CAS option to do ...
13
votes
1answer
385 views

Highlighting Mathematica code in $\LaTeX$ document

I was thinking about the best way to include Mathematica code in a $\LaTeX$ document with a nice syntax highlighting. I have tried the packages listings and minted (with pygments), which both claim ...
7
votes
4answers
797 views

Controlling ListPlot Line Colors

I am using ListPlot to display from 5 to 12 lines of busy data. The individual time series in my data are not easy to distinguish visually, as may be evident below, ...
10
votes
5answers
3k views

How do you find the frequency and amplitude from Fourier?

The problem is that a typical harmonic time history will not have an integer number of cycles in the data. For example, with the following time history you get a numerical Fourier transform. ...
2
votes
1answer
553 views

Solve[Tan[theta] == (b*Sin[t])/(a*Cos[t]), theta] breaks when “Reals” is added?

Mathematica solves this equation fine: Solve[ Tan[theta] == (b*Sin[t])/(a*Cos[t]), theta] // InputForm ...
5
votes
0answers
121 views

Make Enter create new line break inside InputField [duplicate]

I would like to write multiple lines of text inside an InputField, using ContinuousAction->True to update some variable ...
1
vote
1answer
798 views

Plot periodic function from Dirac delta function [duplicate]

Sorry for my bad english. I need to plot periodic function from dirac delta: δT(t)=∑δ(t–n*T), where T - is a constant, and n=-20..20 And after them, plot new function fd=f(t)*δT(t) - discrete signal ...
4
votes
1answer
149 views

Searching for closest entry in a table

I have a large table of triplets whose structure is: list=Table[{a,b, RandomReal[]}, {a,1,100}, {b,1,100}] I would like to search through the list by looking ...
0
votes
3answers
337 views

Solving an Integral Numerically

I have been trying to solve the integral equation below, but cant seem to find a way out of this. Can someone please help me out with suggestion? $f(t)=\int_0^{\infty}\frac{K_1a(t)}{a(t)+K_2}\,dt$ ...
6
votes
1answer
284 views
0
votes
1answer
934 views

Finding equation of tangent line at a point [duplicate]

my function is defined as f[x_] = x^1.1 - 2.5 x^.5 I need to find the equation of the tangent line to the curve using the point slope form which would be something like f'[a][x+a]+f[a] a=1 and x=1 ...
3
votes
2answers
108 views

Importing multiple tables within a single file

Suppose I have a file with multiple tables, each separated by a line beak, like this: ...
1
vote
0answers
59 views

Telling mathematica that something is an integer [duplicate]

Is it possible for me to tell mathematica something is an integer? like if I typed Sin[n Pi]+Cos[n Pi] it would tell me it equals 1 for even n and -1 for odd n? ...
2
votes
1answer
106 views

Is it possible to create a manipulate control with lower and upper value

I'm trying to create a manipulate controller to set four value. High and low temperature for both test and use conditions. The four values then go into a calculation. I can set these as four ...
14
votes
2answers
511 views

Generating Gelfand-Tsetlin patterns

I am doing some research on some combinatorial object called GT-patterns. They are generated from three parts of data. Two integer, partitions (sequences of weakly decreasing numbers), $\lambda = ...
3
votes
1answer
214 views

Formatting imported Excel spreadsheet to include tooltips on plot

I have an Excel spreadsheet with numbers on two columns and names in a 3rd. I would like to plot a 2d graph of the first 2 columns and see the respective name from the 3rd column as a tooltip. I ...
1
vote
1answer
218 views

Programming- cryptography

I have defined the following function in Mathematica to get a SET OF m SETS (these sets are the codes {p,q,d,e,n} for the ...
1
vote
1answer
137 views

Need help scoring randomly generated SEC football rankings

So my task is to score all the possible rankings of the 14 SEC football teams and find the best one, using who won in head-to-head games as the sole criterion (so not factoring in strength of schedule ...
6
votes
1answer
425 views

Is there no documentation for Method in Eigensystem?

There does not appear to be any documentation on how to use Method in Eigensystem, or at least not in Version 9.0.1 of ...
2
votes
1answer
88 views

About an elementary limit

Here we have an elementary limit that Mathematica simply doesn't want to compute it. What solutions might I have to fix that? Could you help here? As you can easily guess, the limit is precisely $0$. ...
0
votes
1answer
187 views

Generate encoding from nested list

Taking reference of Huffman code algorithm, ...
3
votes
4answers
372 views

How to apply a function of several arguments to a list?

I have a list of triplets: list = {{1, 3, 5}, {4, 5, 1}, {4, 9, 2}} How can I apply a function f to the last element of each triplet when f the last and ...
1
vote
1answer
383 views

Prevent FullSimplify from converting trigonometric expressions to exponential

There's an option for FullSimplify, which is Trig, and with it I could prevent a trigonometric identities from being used. I'm ...
0
votes
0answers
42 views

Explicit multiplication * sign in Mathematica [duplicate]

I need to turn my Mathematica output (in string form) to a form that I then need to feed to Maple, and specifically I'd need all multiplications to be marked by * (as opposed to x or, as it happens ...
2
votes
1answer
495 views

Extract the left channel from an mp3 file

I'm trying to control where a sound is going to be heard, in the left For example, when I import an mp3 file, and I want to hear it only from the left ear, what should I do? I've never worked with ...
0
votes
2answers
260 views

Extract coordinates from a polygon [duplicate]

I need to extract the coordinates from a 2D polygon then calculate the maximum and minimum of the x and ...
2
votes
0answers
82 views

Function that assigns properties [duplicate]

I want to create a function that creates and assigns properties to a symbol. In theory this would behave similarly to the NonzeroValues property of ...
4
votes
2answers
220 views

How to set up and minimize a large system of equations to resolve the individual components

I am trying to set up a system of 400*N equations to deconvolute spectral data for four different compounds. I monitored 400 different wavelengths in N solvents (3 solvents in this case). In order ...
9
votes
2answers
404 views

Counting and extracting hit circles/triangles for randomly chosen points

Below, you see a triangle in which the incircle was inscribed. As we know, the center of this circle is the intersection of the angle bisectors. At this point, one could go further and find the ...
3
votes
2answers
213 views

How to find the maximum of this function on the positive real line?

I need to maximize this function on the positive real line: $$ \frac{1}{\Gamma(x)^{14}}\cdot\frac{1}{{\frac{323.6}{14x}}^{14x}}\cdot(1.22578*10^{19})^{x-1}e^{-14x} $$ the correct answer should be ...
0
votes
0answers
342 views

Graphic Timelines in Mathematica in v9 (2014)

I noticed a previous question on this site: how to make graphic timelines in mathematica The question concerned the creation of "graphic timelines" of this form: ...
5
votes
2answers
340 views

How to make binary image from black holes on white background

How to convert black holes on white background, so that I can see a binary image of holes on white image or bright dots on black image. I can create a mask then also I am stuck with bright dot on ...
0
votes
1answer
100 views

Combine multiple outputs into a pane [closed]

Probably unnecessary detail: So here's what I'm envisioning. I have several outputs from different calculations (perhaps several ListAnimated tables of GraphicsGrids of plots). In one, I did all the ...
1
vote
2answers
193 views

FindFit giving weird values on a logistic equation

I was trying to fit a set of data onto a logistic equation, however it ended up telling me that the initial value when $t=0$ is greater than the maximum limit, thus I am led to believe that it isn't ...
3
votes
2answers
247 views

List manipulation after importing txt-file

I have some problems converting data which I imported from a txt-file into proper Mathematica expressions. After importing my data looks like ...
0
votes
1answer
1k views

How can I draw this particular phase diagram in Mathematica? [duplicate]

Sketch the phase diagram for systems with the following velocity functions where a and b are constants with ...

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