# All Questions

301 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 ...
240 views

### Solving coupled transcendental equations with Nsolve

I'm trying to solve a system of coupled nonlinear equations using NSolve: ...
248 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 ...
57 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 ... ...
282 views

### $L_\infty$ norm minimization

I write supplemental explanation to render my aim of optimization. First Consider discrete time linear system below: $$G(z)=\frac{1-e^{-0.3T}}{z^{100}(z-e^{-0.3T})}$$ ...
4k 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] ...
141 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: ...
102 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 ...
621 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] ...
146 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 ...
959 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 ...
822 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 ...
168 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 ...
130 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: ...
186 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 ...
71 views

### Distinction between 2 NETTypeInfo answers

In a NETLink application I checked all the types offered by LoadedNETTypes[] according to the following: ...
172 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], ...
211 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: ...
122 views

### Eliminate complex answer to differential equation

I've tried the following: ...
220 views

### Mathematica Solve Hangs Indefinitely

The following code hangs ...
173 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 ...
96 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: ...
172 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 ...
70 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: ...
173 views

### How to perform a symbolic minimization?

Can Mathematica determine the symbolic expression in terms of τ that minimizes f[τ] ? ...
198 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 ...
48 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 ...
441 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 ...
105 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 ...
362 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 ...
654 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 ...
93 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: ...
130 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 ...
293 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.
96 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). ...
113 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: ...
279 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.
89 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 ...
369 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: ...
206 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? ...
100 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 ...
695 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 ...
72 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 ...
171 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 ...
179 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 ...
86 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 ...
190 views

### Better way to plot multiple discrete PDFs?

I often find myself trying to plot multiple PDFs for my courses. I find the default tools available to me are lacking and/or cumbersome. After readings some suggestions here, I have come up with the ...
209 views

### preventing TraditionalForm from getting “squished”

TraditionalForm[] does a great job generally speaking, with complex equations like the following, ...