# All Questions

44 views

### Is there anyway to use a named argument in calling mathematica from .NET？

I want to write a .NET program calling Mathematica as a computing engine. But here is a problem that argument a1 is not a constant and its value depends on ...
63 views

### Integration over a (non-parametric) curve defined by indicator function

I want to integrate the real function myFun defined on a 2D plane over the line locus, defined as the solution of a set of ...
138 views

### Speeding up the generation of all k-edge-coloring of a graph

A $k$-edge-coloring of a graph $G=(V,E)$ is a function from $E$ to $\{1,\ldots,k\}$, so in other words every edge of $G$ receives one of the $k$ colors available. (In particular, note that we are not ...
14 views

### Does existence and uniqueness of a classical solution impose uniqueness of weak solutions to a pde? [migrated]

I wonder if one knows that there exists a unique classical solution of a pde (for instance: Fokker-Planck equation), is one able to conclude that there isn't any weak solution of the pde, which ...
82 views

### How to create a complex variable from dated list values

Can anyone help me to construct a variable "PI" from values of variable x. Variable x represents a group of two time series rj and ri on equal dates(joined two dated lists with states).Variable x have ...
26 views

### how to hide the icon of mathematica kernel on the taskbar？ [on hold]

I have written a .NET program with VB which will call mathematica kernel when it be implemented. So, when the program run, there will be an icon of mathematica kernel on the taskbar. How can I modify ...
17 views

### FisherHypergeometricDistribution and WalleniusHypergeometricDistribution, how to specify boundary conditions

I'm trying to write a function that consists of a noncentral hypergeometric distribution. When I'm passing a set of parameters to the function, the following boundary problems occur: ...
185 views

32 views

### Confusing memoization behavior — caching a function that returns a function [on hold]

Here is a simplified version of what I am trying to do: ...
33 views

### Speed up numerical optimization (for plotting and solving)?

Briefly speaking, I want to plot a function PIfun[], which its value is based on numerical optimization using NMaximize. It ...
257 views

### Generating hatched filling using Region functionality

Before v.10 came out there were several Q&A on generating hatched filling for Plot, ListPlot etc. In v.10 we have new ...
38 views

### Findfit doesn't provide reasonable results when fitting a complex function [on hold]

I am trying to fit some data using the function which contains two parameters (a, b) as described below. Hope to determine the a, b that best fit the data. My input is: ...
34 views

### Implementing normalization/rescalement from a Tutorial

I'm trying to implement a rescale/normalization as is described in here by mathematical expressions in page 10, and code in the top part of page 16. The notebook is also available here. The objective ...
61 views

### Obtaining probability density function from a cumulative distribution function

I have some difficult times to obtain the density function of ...
99 views

### Solving systems of equations

So I have a set of equations like 12 of them but 13 variables. However I would like to find the numerical value of the roots for the maximum value of a particular variable. I don't know how to do that ...
101 views

### Plotting two functions in one graph, with different value ranges [on hold]

Plot[2x, {x,0,4}]; Plot[x^2, {x,4,8}]; How do I merge these two graphs into one?
199 views

### How to extract a part of matrix satisfying certain condition(s)

I have a following matrix ...
69 views

### Filling between ParametricPlot and Plot

There are some similar questions: (1) (2) have been ask, but I think this is a different one. If we have a ParametricPlot and a ...
37 views

### How dose solve this equation for a group of x,y, slope of shape [on hold]

This is equation of an ellipse. 5*Y-12*ARCTAN(7*Y/X^2+Y^2-(3.5)^2)=0 OR TAN(5*Y/12)-7*Y/[X^2+Y^2-(3.5)^2] how solve this equation for a group of x,y? (Discretization of shape) How to solve for ...
92 views

### Selecting y-values from xy coordinate grid

Suppose I have a table, u, which is created as follows: ...
51 views

### How to speed up Min of DateObjects?

I'm in version 10.0.1 using a Dataset to do some plots and things. For one of the plots I need to get the minimum date of a some filtered set of the ...
33 views

### Lost all spaces in a paragraph [on hold]

I accidentally pressed the convert-cell to something, don't even know to what... and then found that most spaces in document were lost in that paragraph. I cannot get them back. Please let me know ...
48 views

### Sundaram's Matrix in Mathematica [on hold]

How to Implement the Sundaram's Sieve in Mathematica? If a number is in the Sundaram's matrix I wanted to know the row and column.
154 views

### Graph smoothing keeping vertices fixed?

Context Given a Graph like this one: ...
38 views

### Mathematica AppData folder is taking up too much space

I recently made a small app that I had issues with. I'm pretty sure it ended up being because of all the curated data to load. My problem now is that under the Windows 8.1 folder ...
50 views

### Juxtapose 2D and 3D plots [on hold]

Can 2D and 3D plots be combined so that the 2D plot is the bottom surface of the 3D plot boundary? More on combining 2d and 3d plots Here are some questions here that might make this question a ...
59 views

### NDSolve with a constant

I have a simple differential equation like this s = NDSolve[{y'[x] == A y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}] where $A$ is a constant. Mathematica gives ...
38 views

### How to build a constant Graphics object

I'm making an animation with Manipulate for a representation. The code looks like this ...
65 views

### Second order differential equation with boundary conditions solving repeatedly

I want to solve a second order differential equation in the interval[-1:1], which does not have a analytic solution, \begin{eqnarray} y''(x) &=& k \phi^2(x)y(x) \\ \phi(x) &=& ...
28 views

### Control size of formula in a gridbox [duplicate]

When I enter a multi-line formula, I always use a gridbox. But I find that the size of formula in each box is not appropriate. For example, when I enter a compound formula containing fraction or ...
10 views

### OpenCL_error by ImageSize option

Unable to unload memory problem. The example is in OpenCLFractalRender3D
171 views

### Unexpected Integration Constant [on hold]

Why does this integration Integrate[15-30x+6x^2-1/(x+5),x] return 700 as integration constant? If we make a slight modification ...
26 views

### Automatically discover the class of an arbitrary matrix

In Wolfram|Alpha it is possible to discover some specific classes to which a matrix belongs. For instance, typing this in Wolfram|Alpha ...
37 views

### OpenCL_result not the same as that in the example-Julia

My system is "Windows-x86-64", Mathematica version is 10.0, my card is GTX860M When I'm trying this example, my result is not the same like that in the example. ...
23 views

### Solving/simplifying a trig function [migrated]

Given: $\tan\:a=\frac{5}{12}$ and $a\in QIII$ $\csc\:B=-\frac{5}{4},\:\cos\:B>0$ $\cos\:\theta =-\frac{8}{17},\:\frac{\pi }{2}<\theta <\pi$ Solve: ...
My problem sheet says that $\tan a= 5/12$ and $a \in {\rm Q\,III}$ ($a$'s in quadrant III). Using this information, I am to solve/simplify the expression $\quad \quad \cos\left(\frac{1}{2}a\right)$ ...