# All Questions

74 views

### Order of integration resolves “Indeterminate expression encountered.”

Bug introduced in 10.0.0 and fixed in 10.0.1 Today I came across the following integral: ...
1k views

### how to diagonalize this symbolic matrix?

m = {{0, 0, w}, {0, t, -w}, {w, -w, r}} use equation P^(−1)A P, how to obtain P with Mathematica? Thanks!
70 views

In Mathematica 10.0.1 this works: Extract[{a, b, c, d, e}, {{{1, 3}}, {{5, 4}}, {{2}}}] {{a, c}, {e, d}, {b}} In ...
75 views

### What is the meaning of //N in mathematica? [duplicate]

As the title says, What is the meaning of //N? i can't remember it.I tried looking in documentaion center, but it came up with nothing. Help appreciated.
183 views

### Suggestion Bar Gone in Mathematica 9

I have been using Mathematica (version 9) for some time without any problems. Suddenly today I noticed the suggestion bar is no longer visible, and it's a feature that I use a lot. I checked the ...
164 views

### Frontend: Adding cell-type choices to the “Choose how to enter input” drop-down [duplicate]

In most of the notebooks I work in, I find myself using 2 or three cell-types almost exclusively (typically regular input, and some subset of section/subsection/chapter). A minor annoyance I run into ...
225 views

### How to get “Signature” of each element of “Permutation” output

I need to sum over all possible permutations, multiplied by the Signature of each permutation of a given list of symbols. But, I don't know how to determine the ...
116 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 ...
167 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 ...
163 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 ...
114 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 ...
38 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: ...
275 views

78 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 ...
700 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 ...
103 views

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

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: ...
58 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 ...
76 views

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

I have some difficult times to obtain the density function of ...
181 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 ...
2k views

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

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

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

I have a following matrix ...
252 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 ...
254 views

### Selecting y-values from xy coordinate grid

Suppose I have a table, u, which is created as follows: ...
119 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 ...
222 views

### Graph smoothing keeping vertices fixed?

Context Given a Graph like this one: ...
214 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 ...
85 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 ...
140 views

### How to build a constant Graphics object

I'm making an animation with Manipulate for a representation. The code looks like this ...
320 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) &=& ...
33 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 ...
199 views

### Unexpected Integration Constant [closed]

Why does this integration Integrate[15-30x+6x^2-1/(x+5),x] return 700 as integration constant? If we make a slight modification ...
49 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 ...
102 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. ...
165 views

### Determine if a variable appears in an expression or not?

Consider an arbitrary expression expr. This expression may contain arbitrary data, like integers, variables, implicit functions etc. Now, I would like to determine ...
63 views

### Can't find the limit of this complicated expression

Here is the limit I am trying to calculate ...