# All Questions

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### How does one check a function monotonicity?

http://i.stack.imgur.com/JOS9o.png the question is to analyze $f(x)$ for monotonicity. I know I need to use D[f[x], x] and check if it is less than or greater to ...
120 views

### Trouble solving a system of 2 ODE's with NDSolve

I'm trying to solve a system of two coupled second-order ordinary differential equations using Mathematica's NDSolve. The functions of r that appear in the equations are ...
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### Is there parallel/simultaneous substitution in Mathematica?

I know this is simple but I'm not proficient at Mathematica and cannot seem to find it online or in the help. Also, Replace[] says it does the assignments in order, and instead of a complicated ...
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### How to calculate column number from alphabetic column reference in Excel

Here's a super fun brain teaser!!! Can you give me a mathematical equation to calculate the column number of a Microsoft Excel column, given the alphabetic column reference? Let X, Y, & Z ...
66 views

### Way to simplify an inequality with many variables

my problem is the following: I have three inequalities in five variables $x,u,a,b,c\in \mathbb{R},x>0$: ...
16 views

### How to export the high resolution animation movie?

I would like to export high resolution animation Here is the code: ...
22 views

### How to do this integral of Hypergeometric functions in Mathematica?

I've tried to integrate by part, but it seems that Mathematica is still not able to integrate. ...
56 views

### How to make a disconnected graph to be 1-edge-connected(but not 2-edge-connected) with some shortest edge

Assume I have a graph.You can run following code to get it. Import["http://goo.gl/NaH6rM"]["http://i.stack.imgur.com/EyAKW.png"] It is a disconnected graph.But ...
74 views

### Why are some of the isomorphisms not bijective?

Bug introduced in 10.4 Mathematica computes all the isomorphisms between graph g1 and g2: ...
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### How to copy pixels indexes simultaneously from a list of images

I have a list of images which contain a box. The box is translated from an image to an other. I want to copy the indices of box corners from simultaneously from the list of image. I am wondering if ...
21 views

### Manipulate ListLinePlot for parameter definition out of scope

I would like to generate a ListLinePlot which data generated from the following functions: ...
95 views

### How to Convert a Matrix into an Association?

I have a matrix like this one: test = {{1, "a"}, {3, "b"}} and I want to convert it into an association like this ...
39 views

### Using Minuit2 to minimize a Mathematica function

FindMinimum is great, but sometimes it is difficult to get an idea of the uncertainties and intermediate evaluation diagnostics. How to define a function in ...
21 views

### Table of values for the specific channel of the sound

I want to write a function that takes sound data and number as input and gives back table of values for the specific channel of that sound. I have 2-channel sound: ...
31 views

### What are the differences among Graphics, Raster, Image, List(ImageData) in Mathematica in terms of Head?

I do not know the exact conceptions of Graphics,Raster,Image,List(ImageData). I have only dealt with and used them in ...
34 views

### Panel Regression in Mathematica

I need to do pretty much the most simple panel regression imaginable. I am working with a few variables. Some of them are random variables, so I am going to use a more traditional form of regression ...
32 views

### How to overlay ListPlot on a ContourPlot with correct range?

I am trying to superimpose a scatter (Listplot) on a contour plot. If p1 is a contour plot and p2 is a scatter plot imported from some data, how do I plot them on top of each other? I tried Show and ...
25 views

### How do I create a recursive tree plot for the Fibonacci sequence?

I would like to create a plot that shows the recursive tree for the nth number of the fibonacci sequence, as the one below. http://faculty.ycp.edu/~dhovemey/fall2005/cs102/lecture/fib5.png Ideally, ...
33 views

### Calculating sum of BesselJ[n, x]

My friend has a sum in his research paper that looks like this $$\sum_{n=-\infty}^{\infty}\frac{J_n^2(x)}{n-\kappa}.$$ He was able to calculate this sum analytically, by substituting the denominator ...
38 views

### Exporting formatted numbers

I would like to format numbers of a list and write them in columns to file. ...
421 views

### Calculating probabilities symbolically

Is there a way to solve for statistical quantities analytically/symbolically in Mathematica? example 1: Lets say that I want to do a calculation that requires Bayes theorem. I know p(a), p(b) and ...
19 views

### 'Contingent' user interface (DialogNotebook with PopupMenus that depend on previous PopupMenus)

I'm creating a user interface for data entry. It makes sense for the content of certain menu items to depend on the information that has been entered earlier on the form. In a trivial example, ...
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I would like to plot Scherk's 1st Surface which is defined on a checkerboard of the plane, e.g. $-\frac{\pi}{2} < x < \frac{\pi}{2}, -\frac{\pi}{2} < y < \frac{\pi}{2}$ and $\frac{\pi}{2} ... 0answers 89 views ### Find coordinate {x, y, z} where two functions are minimal I am trying to find a point in a ListPointPlot where the total RegionDistance is minimal AND the total differences of the ... 3answers 44 views ### Maximum value of a function using loops I have a function ab+bc+a/c, where a,b and c ranges from 1 to 5.I have to get an output of maximum value of this function and the values of a,b and c which give that maximum value. Is it possible to ... 2answers 107 views ### How to plot a lattice (2D or 3D) given a basis I want a graphical picture of a lattice with basis such as$\{(1,1), (\sqrt{2}, -\sqrt{2})\}$. Does Mathematica already have a pre-made function that finds all linear combinations over$\mathbb{Z}$... 1answer 32 views ### FourierTransform a function doesn't give result when variable is 0 I am trying to get a Fourier Transform of a function. However it doesn' work when the variable is 0. I used Mathematica 8.0 on a Windows Server 2008 R2 system. The code is as follows: Defining ... 0answers 35 views ### How to get ContourPlot3D to run involving elliptic functions? I need to plot zeroes of a function of three variables that involves elliptic functions. For example, I have ... 0answers 22 views ### Setting different B.C. for different fields in NDSolve My question regards construction of a PDE solver for several fields, with different type of boundary conditions for several fields. Say I have the following set of equations: $$... 1answer 26 views ### Substitution in a power transformed in product This could be thought as a duplicate question but it's in fact an extension of an old section. 1 + (a (α + β))/(b^2 + c^2) + ((α + β)^2 a^2)/(b^2 + c^2) could ... 1answer 38 views ### insert comma between numbers I have the following numbers rows and I want to insert a comma between the numbers? 6 7 9 51 64 68 79 102 116 128 148 155 184 202 273 283 292 1 7 8 10 52 65 69 80 103 117 129 149 ... 0answers 3 views ### Gaussian process for machine learnig [migrated] Here is my question in the equation 2.11 A is N by N matrix, so there is not feasible if N is large the textbook say in the euqation 2.12, we only need to invert size n by n. But I think K is 1 by ... 3answers 139 views ### Epilog with multiple lists I have as example multiple lists of x data (in mm) http://pastebin.com/7xwgGDsd which I want to plot against time (in sec). ... 1answer 53 views ### Partial evaluation of symbols with non-inert OwnValues Background: there are many, many questions here about the infamous ::setraw error. More often, than not, they have to do with repeated assignments to symbols. Here's the code: ... 2answers 27 views ### Find the Kimberling Sequence How to find the Kimberling Sequence by using Mathematica? each row is obtained from the previous by boxing (and expelling) the main diagonal element, and then reading the first number after the ... 1answer 33 views ### Determine parameter from which on there is no more root for a given function Let \gamma>0 be a real number and \Phi(r)=\frac{1}{r}-\frac{\pi}{4}\left(H_0(r/2)-Y_0(r/2)\right) defined on [0,\infty), where H_0 is the Struve function of order zero and Y_0 is the ... 0answers 37 views ### Symbolic vector addition I'm trying to figure out a nice way to add a mix of symbolic and explicit vectors/matrices without mathematica treating the symbolic vectors as scalars and promoting them to constant arrays. For ... 2answers 149 views ### Solving Boolean equations @Artes suggested this code to me to solve this system of equations: ... 1answer 87 views ### Round off in Mathematica Built-in functions [duplicate] Is there a way to force Mathematica to use its Built-in functions instead basic functions? For instance, the Hypergeometric1F1[a,b,x] function has a exponential form when its firsts parameters are ... 0answers 15 views ### Putting constraints on interpolation I am attempting to construct a function by interpolation, but I'd like it to be strictly increasing and convex. Is there an easy way to add constraints to Interpolation or should I change it further ... 1answer 74 views ### Deleting vertices from Graph and preserving Structure? My goal is to remove vertices from graphs (and the edges from them) and then take GraphComplement to find out cut sets in graphs with sink and source such as here. So How can I delete vertices from a ... 0answers 35 views ### Rotation of basis system by WignerD How can I calculate a 16x16 matrix HCF in a rotated basis system by applying WignerD. My basis is ... 0answers 76 views ### FindMinimum doesn't increase step size when necessary I've spent much time finding a minimal example demonstrating this problem with FindMinimum. Normally one faces this problem when fitting very large and complicated ... 0answers 38 views ### Stop front-end from auto-scrolling notebook to show output I have made a simple "percent complete" output to track my For loop, where I incrementally print values and then delete the output right before printing the next ... 0answers 52 views ### DSolve an ITO process I want to solve the following process:$$ dX(t) = \mu dt+\sigma dW(t) \\ X(0) = 0 $$We know the solution is the following:$$X(t) = \mu t+\sigma W(t)$\$ The question is how can I do it with ...
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Has anyone tried accessing the Amazon web services (AWS) API from Mathematica? I'm assuming the HTTP WebService module of Mathematica would be a starting point. Any suggestions on getting started ...
43 views

### Evaluate polinom with matrices

Let's say that I have the following polynom f = a+b+ab I want to evaluate this expression like this: ...
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