0
votes
3answers
115 views

How to find the Mean of results given as a list of Rules?

How can we find the mean of the following type of data? ...
1
vote
2answers
135 views

Add Piecewise functions expanding domains

I want to reproduce these plots for further development in Mathematica: To do so I defined the functions A and B as following ...
2
votes
2answers
99 views

Why I need Evaluate for the Plot of the probability density function of PolyaAeppliDistribution?

I encountered this when I was trying to answer this question. I just can't understand why the following code will only give a line at $y=0$: ...
1
vote
1answer
246 views

3D Printing in Mathematica Tutorials

Are there thorough tutorials on 3D printing for Mathematica? It seems that being able to export Mathematica files for 3D printing is unfortunately still a novelty, but it's vital for my business ...
1
vote
1answer
164 views

Removing the white space around plots when using customized FrameTicks

I'm using the CustomTicks package, which is part of the LevelScheme package, for styling the ...
0
votes
0answers
145 views

Solving coupled transcendental equations with Nsolve

I'm trying to solve a system of coupled nonlinear equations using NSolve: ...
1
vote
1answer
230 views

Detecting a nonlinear edge in a 2D point pattern

Following an earlier post here, I have generated a point pattern on the unit square $[0,1]\otimes[0,1]$, which is described by a piecewise constant intensity function constructed so that (in ...
0
votes
1answer
50 views

Why the tensor product of list of variable change the subscript position in products

{Subscript[g, 1],Subscript[e, 1]}\[TensorProduct]{Subscript[g, 2],Subscript[e, 2]}\[TensorProduct]{Subscript[g, 3],Subscript[e, 3]} I am expecting answer like ... ...
2
votes
1answer
242 views

$L_\infty$ norm minimization

I write supplemental explanation to render my aim of optimization. First Consider discrete time linear system below: \begin{equation} G(z)=\frac{1-e^{-0.3T}}{z^{100}(z-e^{-0.3T})} \end{equation} ...
0
votes
1answer
1k views

Table - find index of the maximum element [duplicate]

Let's suppose that I have table t = {1.23, 3.4, 10, 34, 1.78, 0.98, 12.56}. To take the biggest element I can use Max[t] ...
2
votes
1answer
126 views

Clojuratica setup

I am trying to get Clojuratica set up (MMa v 9 free trial) (on a Mac running Mavericks) I am following the instructions in "Clojure Data Analysis Cookbook" but have also followed the instructions: ...
1
vote
0answers
74 views

Memory consumed by NMaximize with NDSolve

I'm using NMaximize on a function that calls NDSolve, and running out of memory. I created the following minimal example that (I ...
1
vote
1answer
282 views

ListPlot doesn't shows all points [closed]

I have a table: p1 = Table[(Binomial[2000, k]*StirlingS2[1386, k]*k!)/(2000^1386), {k, 1, 1386, 1}]; I used ListPlot[p1] ...
1
vote
1answer
123 views

Get the correct position of a label on a vertical gauge

I am trying to have the value for a vertical slider display next to the indicator arrow for a vertical slider. However, my attempt is slightly wrong; the coordinates are scaled to the entire frame of ...
65
votes
2answers
737 views

Why are numeric division and subtraction not handled better in Mathematica?

There is something that has been troubling me for a while. At least in version 7, the performance of a / b and a - b is not ...
3
votes
2answers
493 views

Has Mathematica a function to compute the Smith Normal Form?

The Smith normal form is a matrix that can be calculated for any matrix (not necessarily square) with integer entries. See Wikipedia for a more elaborate description. Has Mathematica a function to ...
4
votes
2answers
127 views

Coloring the points in a ListPlot with the value of another function [duplicate]

I'm a relative beginner in Mathematica, but after reading the forums for a long time, I couldn't understand one thing: I want to plot a list h. Let's call it ...
0
votes
3answers
102 views

How to remove the 1. when differentiating 0.5x^2

My question is very basic, When using the Differentiate functionality of Mathematica in this way: D[0.5 x^2, x] This results in: ...
0
votes
2answers
163 views

Dynamically change the variables plotted against in Plot3D

This question posed by @Cam is the closest I can find to my question but I feel that the answers don't really guide me in the way in which I'd like to proceed.... How do I dynamically change ...
1
vote
0answers
69 views

Distinction between 2 NETTypeInfo answers

In a NETLink application I checked all the types offered by LoadedNETTypes[] according to the following: ...
0
votes
1answer
135 views

Extract information from function definition returned by DefineDLLFunction

I have an application using DefineDLLFunction whose output is: Function[Null, If[NETLinkDLLPrivatecheckArgCount["DRV_AOVoltageOut", {##1},2], ...
0
votes
2answers
176 views

How to find intervals in the domain corresponding to intervals in the range?

I want to find the intervals for the argument m1 of this function corresponding to the value for the function lying in given intervals of the range: ...
1
vote
2answers
103 views

Eliminate complex answer to differential equation

I've tried the following: ...
1
vote
1answer
173 views

Mathematica Solve Hangs Indefinitely

The following code hangs ...
2
votes
2answers
139 views

Assigning weights to edges of a hypercube based on the Gray code labels for vertices being connected

Say I want to construct an $n$-dimensional hypercube graph $G$ using the command: G = HypercubeGraph[n]. I'd like to assign edge weights to the $2^{(n-1)}n$ edges ...
0
votes
1answer
85 views

LinearSolve symbolic equations

I am trying to use mathematica to solve the following system of equation, but I can not for the life of me get it to work. I have the following: ...
0
votes
1answer
164 views

Please explain this code (contains Append, Do, Coefficient)

I am a graduate student using a past student's Mathematica program. Will someone please explain to me exactly what this piece of code is doing? Specifically the ...
0
votes
1answer
68 views

Checking result for expression

I want to verify the following result: $\sum _{y=2}^{n+1} \left(\sum _{x=y-1}^n \frac{1}{x-y}\right)=n \left(H_n^{(1)}-1\right)$ In Mathematica i try with: ...
1
vote
1answer
122 views

How to perform a symbolic minimization?

Can Mathematica determine the symbolic expression in terms of τ that minimizes f[τ] ? ...
3
votes
0answers
152 views

GUI Maker? Is there a perhaps drag and drop GUI maker for Mma?

IDE's like Borland, Eclipse, and others have ways of making GUI's. Drag and drop is usually the way of it. Then one puts the variables together and links up everything. Mma seems to handle (at least ...
1
vote
1answer
46 views

How to substitue local variables into expression with free variables?

I'm wondering how to do the following: expr = L + R; foo[L_, R_] := expr; foo[1, 2] (* L + R *) and have it substitute the function variables ...
0
votes
2answers
220 views

Manipulate and ListPlot [duplicate]

I have a $300$ by $2$ matrix called r which its elements depend on parameter g. I would like to plot this matrix and change the ...
0
votes
2answers
98 views

Simplify an expression under certain condition

I have a variable A = g / (1 + g R) Actually, if the quantity (g R) >> 1 it is possible to write A as A ≈ 1/R. How can I do this in Mathematica? I tried with Assumptions, Refine, Simplify, but i can ...
0
votes
1answer
176 views

How to work with 3D images of STL format

After importing a 3D image of STL format, my possibilities in regard to "3D Volumetric Image Processing" seems rather limited. All examples are given with TIFF files. Is there a way to convert from ...
10
votes
2answers
515 views

Finding all possible solutions to a math mind game

In the example below the letters shall be replaced by numbers. The numbers are from 1 to 9, and each letter has the same number ...
1
vote
4answers
87 views

initialize Manipulate with different selection

Is it possible, and if so, how, to initialize the value of h when the value of g is changed, in the following Manipulate: ...
1
vote
2answers
94 views

Use a custom3D graphic for points in ListPointPlot3D

I would like to make a plot where the points of ListPointPlot3D are themselves a Graphics3D object created using SphericalPlot3D, and each one depends on the position of the point. So basically, you ...
3
votes
1answer
173 views

Is there any faster way than Eigensystem to diagonalize a Hermitian matrix?

Is there any faster way than using "Eigensystem" to diagonalize(get all the eigenvectors and eigenvalues) of a Hermitian(self-adjoint) matrix? That would be amazing :). Thanks.
1
vote
1answer
80 views

RandomVariate[LogNormalDistribution] works not as expected

I currently simulate data with a lognormal distributed covariate. I used the following code to check the generated random numbers (with Mathematica 9). ...
1
vote
1answer
94 views

How to place a matrix under controls (sliders) in a Manipulate?

I want to know how I can place a matrix under my sliders. Here is my code: ...
2
votes
1answer
157 views

How do I switch between two notebooks in Mathematica 9 interface? [duplicate]

How do I switch between two notebook windows in the Mathematica 9 interface? I would like to use a keyboard shortcut such as Ctrl+Tab or Alt+ Tab as with windows or tabs in programs like Firefox.
1
vote
2answers
86 views

How to run all command with same name into a notebook

I have a very big notebook with a command repeated a lot of times but with different parameters each time and I want to run all these commands at the same time without having to run separately all of ...
0
votes
1answer
159 views

How to use NIntegrate in a function using parameters from a list

I would like to use NIntegrate in a function with some parameters from a list. I simplified my problem for this forum. The list of parameters is as follows: ...
1
vote
1answer
145 views

Read a binary file to an image in memory then analyze it

Is it possible to read a whole file (~100 MBs) into memory, and then use BinaryRead[] function on the data loaded into memory to read/cast it to the types I need with a proper StreamPosition pointer? ...
0
votes
0answers
69 views

ParametricNDSolve: Parameter inside UnitStep leads to longer integration times

I have found one of the most annoying issues in ParametricNDSolve. When a parameters occurs inside UnitStep (and Piecewise and If) the integration takes much longer time. I illustrate this by an easy ...
6
votes
3answers
312 views

neighbor swapping distance between two strings

Updated Problem Description I have a collection of strings $S$ that only contain two (or $m$ in general) kinds of elements: in this case C and D. For all $s\in S$, the length is the same, the number ...
1
vote
0answers
63 views

Why the variable cannot use subscript? [duplicate]

Today,I use the Lagarange method to deduce the robot 's dynamic equation .I use the mma to help me calculate. I want to use $$x_B,y_B, v_{Bx}, v_{By}, v_B ^2$$ to represent the point B 's ...
2
votes
2answers
134 views

how to get a linearized curve in some intervals

in below picture I draw a graph base on weight of a controller system against cost function. I want to linearise and divide this curve to for example 5 five intervals. is there any function in ...
2
votes
3answers
139 views

Counting instances where the two identical characters are at the same positions in two strings

Let $s_a$ and $s_b$ be two strings over a $q$-ary alphabet. For each character $(c_1,...c_q)$ in the alphabet, I'd like to return a pair of values $(r,k)$ where $r$ represents the count for the ...
0
votes
1answer
81 views

Defining a formal Primitive Recursion

I'm searching for a way to define the function this wikipedia article call Primitive Recursion. It should have two functions as argument and it should return a function. I need this as helping in ...

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