# All Questions

41 views

### Why do EstimatedDistribution and DistributionFitTest work this way

I am fitting some time-series data to both a stable distribution and a normal distribution in order to assess the goodness of fit of each. Along the way I encountered the following confusing result. ...
45 views

### Apply IC and BCs on Second - Order Linear PDE

I am now trying to solve second - order linear partial differential equation in that interested eq. has been separated into variables to simplify the procedure for Mathematica. Here is my equation; ...
63 views

### How do I obtain the Fisher Information Matrix from a data set?

My apologies in so much as this is probably in large part a problem of me not being aware of the necessary mathematics but since this should be a common issue in machine learning and Mathematica now ...
43 views

### Export Notebook causes an INTERNAL SELF-TEST ERROR: Files2|c|1713 message

On my machine (Windows 8.1) and M10 the following two lines, that must be run on an already saved notebook, ...
54 views

56 views

### VoronoiMesh for 3D points

I believe that this is a doc error in V10 (this was programmed to be but not implemented). The new VoronoiMesh should work for 3D set of points. The ...
51 views

### How to use a scheduled event in a cloud notebook to read data files on a desktop

I don't know even how to attempt this, or if it's possible. I would like to be able to examine conditions, data, status of email server on my work desktop from the programming cloud. I recognize that ...
53 views

### Plotting multiple curves with multiple axes (>2) on the same plot

I'm attempting to generate a graph that depicts mulitple time series, measured in different units (but with a common time scale) on the same graph. This is a generalization of the familiar ...
61 views

### Antialiased text in manipulate constantly re-evaluated, ignores TrackedSymbols

I am trying to display antialiased text (using the ImportString[ExportString[]] method shown here) but inside a manipulate so that the text can be changed interactively. I have found a way to do this, ...
40 views

### Sending RObject to RFunctions

I want to realize function from some R package in Mathematica. First load RLink and package what I need ...
98 views

### Kernel quits upon evaluation of a limit

Using 9.0.1 on OS 10.9.3, I evaluated Limit[(1 + t/Sqrt[n])^-n, n -> Infinity] at the start of a session and it caused an error that made the kernel quit. ...
59 views

### Cannot launch MathLink from C

I am trying to launch a MathLink from a 64bit C dll that I am building, using the following code: ...
48 views

### Simulating a system of nonlinear ODEs?

I was trying to simulate a system of ODEs on Mathematica in an effort to try to understand how to muck around with Mathematica but for some reason the following lines of code do not yield any results; ...
43 views

### Will custom fonts in my notebook be carried over?

In my notebook, I have Open Sans (a free font) as a text font and Consolas (a paid font) as a code font. Those fonts are coded into the stylesheet of my notebook. My question is: if I send someone a ...
56 views

### Integration of UnitStep or HeavisideTheta

I am using Mathematica 9. If I evaluate Integrate[Piecewise[{{1 - r, r > 0 && r < R}}, 0], r] then I get ...
102 views

### Computing a sum

I'm trying to make Mathematica compute this sum: Sum[(-1)^k (n - k)^2 Binomial[2 n, k], {k, 0, n}] As is, I get an awful formula: ...
96 views

### A math function similar to “LatticeReduce” for finding linear independent basis

We would like to ask a math function similar to "LatticeReduce" for finding linear independent basis. The input is a list of vectors $M=\{v_1,v_2,v_3,\dots\}$, with the following property: There is a ...
76 views

### calling CUDA library functions

Mathematica has some predefined CUDA functions, like CUDAMap, CUDAFourier, etc. My question is how can one call functions which are part of CUDA library but not part of predefined Mathematica ...
68 views

### ParallelTable and expensive functions

I would like to build up a 2D-Table using ParallelTable as follows ...
55 views

### Quantities formatting problem

So I've developed this simple code ...
149 views

### Strange opacity behavior

I edited my question and included the code: here I make the general definitions for the parametric plots I have to do later (these are simply the definitions of the x and y coordinates of the points ...
66 views

### How to specify initial condition including integral equations in the case of the dirac equations?

Hi I am trying to solve a system of differential equation with NDSolve. The problem is I have like $3$ (maybe $5$) boundary conditions, but only $2$ differential ...
84 views

### Graphics always rendered twice with SimpleFrontEnd example?

I am looking at the Java SimpleFrontEnd example provided by Mathematica. Everything goes well except it always renders graphics twice. Can anyone help me with ...
74 views

### Alternative for citation management in Mathematica 9 for Mac

I have just read that Mathematica 9 for Mac does not support Citation Management. Any ideas of a poor's man replacement so I can still use Mathematica on Mac for editing? I mean, have someone written ...
63 views

### Complicated output from simple Eigenvalues problem

I have code that uses Eigenvalues on matrices of various sizes. But the output of what should be a very simple problem, namely finding the eigenvalue of a 1x1 matrix, is overly complicated. ...
48 views

### What is “ (Dialog) Input [ ] := ” after evaluating a cell?

I have done a time-consuming run and calculation. After many hours ( about 7 hours!), the black color which shows that the cell is evaluating, turn into gray and a strange text appears like this : ...
57 views

### Does the VerticalCallout algorithm in PieChart work correctly?

This manufactured example is typical of many real world cases where we have thin slices of the pie: ...
42 views

### $Failed below input area of new cell in notebook The Mathematica 9 installation on my laptop has developed an odd feature. Just underneath the grey line indicating the input area for a new cell, the expression ... 0answers 99 views ### Displaying primes as a 3D array of spheres I am currently learning my way through Mathematica and have stumbled upon a strange problem. It is asking me to implement PrimeQ into ... 0answers 53 views ### Can BreadthFirstScan be modified? I would like to obtain a "slick" implementation of A*-search algorithm on Graph objects, using the built-in BreadthFirstScan (if that is possible at all). I noticed that BreadthFirstScan is static in ... 0answers 60 views ### Compiling/calling Mathematica-generated .so from C I'm trying to call a compiled function from a C program. I am generating the static object ... 0answers 73 views ### Filling -> Axis leaves a gap Filling leaves a gap between the function curve and the axis ... 0answers 57 views ### Why does setting$Assumptions make my Fourier transforms slow?

Consider these Fourier transforms ...
64 views

### Locate Blow-up in NDSolve with Whenevent

At some point I get this error: ...
89 views

### Finding rings in a network

I am doing a research on networks which consist of polygons with different number of sides. Is there a way to find rings by BreadthFirstScan function. For ...
80 views

### DateList does not output the correct time, but Date does

I noticed a strange thing when trying the new astronomical data functions in Mathematica 10 on my Raspberry Pi. The Sunrise and ...
43 views

### Notation, Format and Interpretation

I am unclear on the exact relationship between Notation, Format and Interpretation. ...
117 views

### Faster Ways to compute recursive summation

It takes a long time to compute the summation below, and I'd like to know if there are some better ways to compute things faster. I have used $3$ ways to calculate, but they are very unsatisfactory. I ...
109 views

### Partial convolution of random variables in random vectors

Suppose $(X_1,Y_1)$ is a bivariate random vector with a given distribution and let $X_2$ be a univariate random variable with the same distribution as $X_1$ but independent of $(X_1,Y_1)$. I want to ...
53 views

I've written a Mathlink program that is called from Mathematica 9. It works very well but currently uses double precision numbers in the C++ function. I've already replaced them with floats in C++ ...
41 views

### Equation involving hypergeometric functions

I want to solve this equation but nor NSolve nor Solve are able to do this. ...
60 views

I'm trying to use a LibraryLink function in parallel. It is an embarrassingly parallel problem, so that no dependency between those parallel tasks. However I can only get the parallel efficiency about ...
55 views

### Maintaining postfix convention for directives in notebooks

It seems to be a fairly common convention to write certain 'meta' functions in postfix form like f[x] // Simplify to keep the the mathematical content at the ...
82 views

### Deciding whether a semi-algebraic set is empty. Which command is best?

[Update] I was able to prove that the "larger" set $1\ge x \ge y,w \ge 0$ and $p(x,y,w)>0$ is empty with another computer algebra system in my slow laptop in few minutes but in Mathematica even ...
69 views

### Front End - Bug in Edit->Find?

As a beginner I make notes in my notebooks on what I am learning as I go along, and I have also referenced the help files by pasting hyperlinks from them - this seems to break the Find function. Is ...
40 views

### Limiting scope of Front end “Replace All” in Find & Replace

The warning on find and replace isn't explicit and I only found out after an almost harmless global change that I really was replacing ALL, not just all instance in my selection (which is where most ...
46 views

### OpenCL pass local memory

I've got the following OpenCL function: __kernel void mergeSort(__global const float * in,__global float * out, __local float *aux) When I try to call it, I only ...
74 views

### Are there some other ways to solve a second PDE except DSolve?

I have a partial differential equation as follows: $$\frac{\partial p(x,t)}{\partial t}=\text{Dp} \frac{\partial ^2p(x,t)}{\partial x^2}-\frac{p(x,t)-\text{p0}}{\tau }$$ What I try to do was to get ...
Mathematica newbie learning by doing (or not so far, in this case). Problem: Special Relativity - consider two inertial frames $A$ & $A'$ in relative motion. At a time $t0$ as measured in $S$, ...