# All Questions

5 views

### Conjugate Interpolating Function?

After use NDSolve I got this {{a1->InterpolatingFunction[{{0.,40.}},"<>"] I wonder how to conjugate this function Thanks for answer
11 views

### Manipulate for Electric Field

I'm kind of new to Mathematica but I'm getting the hang of it slowly. Anyways, I'm trying to do a project on the electric field of two particles so my professor helped me with this code (sorry in ...
11 views

### Find the values of parameters so that the matrix is symmetric positive definite

Good evening , I have a matrix 20x20 in symbolic form. The matrix depends on 5 parameters (a,b,c,d,e). I would like to get the interval of each parameters that ensures that the matrix S is symmetric ...
15 views

### Meaning of FourierParameters

Many of the Fourier analysis functions take a FourierParameters option. FourierParameters. The documentation just says is an option to Fourier and related ...
12 views

### When to use GenerateConditions->True

Many functions, usuallly those involving integration, take a GenerateConditions option which often defaults to False, or at ...
26 views

### Generating the set of all strings within a fixed edit distance of a initial string?

Provided a starting string initialString, and a particular alphabet of allowed characters {"A","B","C","D","E",...}, how can I ...
25 views

### Loading StatisticsLibrary

I need to use a number of functions from theStatisticsLibrary namespace. Since that is a bit of a mouthful I would like to import it, but I get errors: ...
57 views

### How can I avoid getting the error message Goto::nolabel in my code?

If anyone could suggest a reason why Label[begin] ... Goto[begin] would return Hold[Goto[Begin]], and (better) how can I avoid ...
43 views

### Overlay Rectangle on a ListPlot

I have a ListPlot of 100 data points in the range of 0 and 1. Now I'm trying to find a way to overlay (four) rectangles onto the listplot in 0.25 steps horizontally. Essentially I just have BinLists ...
32 views

### Importing data from excel and assigning a variable to each of its columns

How should I assign variables to the data imported from excel containing 3 columns which are time, mean and standard deviation. I want to perform operations on the three variables to get new ...
26 views

### Ticks don't display on Y-Axis of Histogram when using PlotRange

I have a histogram, if I create it without specifying the PlotRange it works fine and the ticks on the Y-Axis are displayed ...
42 views

### Strategies to find curves on messy data using FindCurvePath

I have a set of data points that correspond to roots of a transcendental equation with respect to a parameter (the abscissa) which, by the properties of the system, define continuous curves (might be ...
29 views

### Variable number of nested variable-range sums

I would like to express the following nested sum in Mathematica: $$\sum_{k_1=m+j-1}^{N-1} f(N,k_1) \sum_{k_2=m+j-2}^{k_1-1} f(k_1,k_2) \cdots \sum_{k_m=j}^{k_{m-1}-1} f(k_{m-1},k_m)$$ where $m$, ...
44 views

### Efficient JSON parser for Mathematica

Im looking for a efficient way of parsing JSON data in Mathematica. I am having a lot of problems with ImportString because it uses Java, is too slow, and uses too ...
42 views

### How to sort the adjecency matrix of bipartite graph so to have two off-diagonal blocks

In a bipartite graphs there are two class of nodes, say A and B. Each node of class A may interact only with nodes of the class B, and viceversa. The corresponding adjecency matrix is thus composed by ...
44 views

### Solving for a charge distribution from a dipole moment [on hold]

I've been looking around but I haven't been able to find any way of solving this conceptually simple problem. In short I am trying to find the charge density in a dielectric in an external electric ...
48 views

### Where can I find a dark stylesheet for mathematica?

The default white is very tiring for the eye after some hours.
21 views

### Expand expression into quotient of negative power series

I have a function T(z) and want to expand it to the following form: At the end I want to have a list of equations, which can calculate a0, a1, a2, b0, b1 and b2 with different values of h1, h2, ...
23 views

### How can I troubleshoot a PDF that fails to import?

I'm trying to import a PDF file whose text I'd like to parse, but I'm getting an error with no explanation: ...
76 views

138 views

### Nothing appears in simple plot

I'm trying to get the following simple code to work. (The code is just supposed to graph the norm of the second derivative of a vector function). ...
34 views

### Questions regarding DictionaryLookup of Mathematica

a. Make a function longest[lang_] that gives the length of the longest word in the dictionary of lang. You should get ...
62 views

### Find lengths of contours in a ContourPlot

I am trying to find the lengths of different contours in the following plot: It is a complicated piecewise function evaluated on the unit disk. I am hoping there is an easy, generalized way to ...
51 views

### Butterworthfilter data filter

I am currently doing a signal analysis and filtering using Matlab. The filter I am using is Butterworthfilter model to filter scattered data (vector data). I am using Matlab as follows: ...
28 views

is it possible to load static library (.lib) compiled in c++ using NETLink or similar in Mathematica?
34 views

### Why does NetworkGraphPlotwrapper appear in my GraphPlot?

I'm making a GraphPlot of data similar to this: ...
43 views

### Fold Dynamic Function

I'm making on a demo working with differential equations as functions of two variables (x and y). The demo will have to Fold the differential equation with an initial y-value and a series of x-values. ...
33 views

### How can I include a popup menu in my wizard's content?

I'm trying to create a wizard that enables the user to choose between different shaft components. At the same time, I need a flag to be 1 if he chooses a bearing and 0 otherwise. I extended the ...
91 views

### Different colors for nodes in tree plot

I have some list of numbers which I am plotting using TreePlot. This is the code: ...
37 views

### Simple propability issue [on hold]

I have a simple problem: I have 16 kitties. There is 1/2 chance to get a male and 1/2 chance to get a female. What is the probability to get at least a female? Then, if 10 kitties die, what is the ...
86 views

### Import multiple files from folder in order of date added

I have a folder that contains certain files I want to import. In my case those are .png files. As all the files I want to import contain the phrase "accum" in their filenames, I can use ...
32 views

### ImageCapture on Windows 8.1

I have an Asus SmartTab tablet with Mathematica 9 on it. When I run ImageCapture, nothing shows up in the image window. Originally running this completely crashed ...
107 views

### Why does Arrow not work well with Scaled coordinates in 3D?

I am a little puzzled by the fact that if I try to use Arrow with Scaled coordinates in 3 dimensions the arrowheads are all over ...