# All Questions

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### Efficient image stacking

I have a list of lists of images that I would like to stack and create mean images for each list of images. Images are .jpg files 2592x1944 pixels large. Each list ...
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### How can I verify double integral solution?

I have a double integral as follows 1-(\int_0^\infty (\frac{Cje\cdot Cte \cdot e^{\frac{-w}{Cte}}}{(Cte+Cje \cdot w)^2} + \frac{e^{\frac{-w}{Cte}}}{(Cte+Cje \cdot w)}) ...
I would like to determine a closed-form expression for the following symbolic integral $$\int_{-1/2}^{1/2} \!\!\!\! \mathrm{d} x \int_{-1/2}^{1/2} \!\!\!\! \mathrm{d} y \, \frac{1 + b x + c y}{1 + e ... 0answers 33 views ### What does F[[1]] mean? [on hold] I defined a function "F" and checked length, then I wanted to select terms I needed, and failed. One of my friends said I should typed something like that: ... 0answers 17 views ### Get .NET Link to work on Raspberry Pi Is it possible to get the .NET Link working on Raspberry Pi? I understand that Linux and MacOS versions of Mathematica come with .NET Link running on Mono and now even possibly under new open-source ... 1answer 86 views ### Integrated Solution Graphics [on hold] I want to draw this nonlinear differantial equation' graphic with other solving equation (in same graphic). ... 0answers 33 views ### Proving positive definiteness or semi-definiteness of a matrix I have the following 4x4 real symmetric matrix: K=\begin{bmatrix}3-3w & -\frac{4}{3}+a+2w & \frac{5}{12}+b-\frac{w}{2} & 0\\ -\frac{4}{3}+a+2w & -1-6a-3x & ... 1answer 107 views ### Problem with loading a Jar file in Workbench I'm trying to load a Jar file in a Workbench project using (after importing "JLink`" in the package declaration): ReinstallJava[ClassPath->"pathToMyJar"]]; In ... 0answers 25 views ### Boundary Value Problem Errror [on hold] I have a first order differential equation such as \quad \quad d/dt (u[x,t]) = - u[x,t]\,u[x,t] with the boundary conditions \quad \quad u[0, t] = 0,\ u[L, t] = 0 where x is between 0 and ... 1answer 28 views ### DSolve for a huge linear inhomogeneous ODE in parallel I have a linear inhomogeneous ODE with constant coefficients, which I need to solve symbolically. The problem is that the inhomogeneity is sum of more than 100 terms (however, each term itself is ... 4answers 104 views ### Using Map sequentially I'm trying to simulate the probability of a balanced hand in Bridge (The Theory of Probability by Santosh S. Venkatesh, 2013) using Mathematica. The problem is solved in the textbook but I just wanted ... 1answer 27 views ### How can I plot a graph of an integral? I want to plot the following function:$$\int \left(\frac{\Gamma (x+1)}{2}-\frac{\Gamma (x-1)}{2}\right) \, dx$$0answers 16 views ### What are the possible topics for graduate dissertation using Mathematica? [on hold] I am a graduate student. I am planning to do one year project work on linear algebra using Mathematica. Until now i have studied transformations,elementary canonical forms ,rational and jordan ... 1answer 75 views ### What are the terms of the sequence generated by Zeta(3s)/Zeta(s)? The LiouvilleLambda function has Dirichlet generating function of Zeta[2s]/Zeta[s]. I am curious about an analogous function with Dirichlet generating function of Zeta[3s]/Zeta[s]. Can Mathematica ... 0answers 20 views ### Solve inequlities for certain variables. Reduce is not helping [on hold] Working with few inequalities where two unknowns are there I wanted to find the relation between them. Reduce is unable to give me an answer. What could be done ... 1answer 54 views ### 4th-order Runge-Kutta method to solve a system of coupled ODEs [duplicate] I am a beginner at Mathematica programming and with the Runge-Kutta method as well. I'm trying to solve a system of coupled ODEs using a 4th-order Runge-Kutta method for my project work. I have ... 0answers 33 views ### Is it possible to write popular journal in Mathematica? As you know, Latex is the most popular toolbox in writing the popular journal articles, like PRL or APL. However based on the "style notebook" in Mathematica shows that the layout of Mathematica is ... 1answer 44 views ### Writing cells from other notebooks into current notebook? I have a large number of Mathematica notebooks which contain study notes for different topics (as opposed to actual Mathematica Code). I'm trying to develop some code to randomly pull parts of a ... 0answers 23 views ### Get function creating variables inside [on hold] I want to use Mathematica to create this function in pseudocode: ... 1answer 62 views ### how to download using weather data function many proporties exactly. how to download using weather data function many proporties exactly. Example WeatherData["WMO44292", "Humidity", "Pressure", "Temperature", \ {{2005, 1, 1, 0, 0}, {2015, 1, 1, 0, 0}}] . 1answer 101 views +50 ### How do I correctly embed VerificationTests in my packages? I like to write my tests before I code and write them inline when developing a package, and when loading a package those VerificationTests should run and the load should fail and print a report if ... 2answers 109 views ### Why can't I change the style of a cell repeatedly? I ran into this when I was working with an example from the Help Pages of V9. Cells is a new function added in V9. The following appears to work the first time it ... 1answer 75 views ### Getting a part of a matrix Inverse for later use I was trying to get an element of a matrix, and use in further computation of my program. Problem was that its not reading the value unless and until I specify it again. My code is: ... 1answer 50 views ### speeding up creation of SparseArray I have to create the following sparse arrays, which are reshaped in a two dimensional matrix, so that i can use the build in Dot[] function to do a kind of ... 2answers 42 views ### NotebookWrite in EvaluationBox forces Input CellStyle There is a promissing new function EvaluationBox[] and a nice last example in documentation section for it: ... 1answer 65 views ### How can I simplify a triple integral with exponentials? I want to simplify the following triple integral with exponential terms. \int_0^\infty\int_0^\infty \int_0^\infty \frac{1}{R\,G} e^{-p(1+R\,a)-q\, b \frac{1+R\, a}{1+G\, x}}\, ... 0answers 24 views ### Topics for master's project using Mathematica [on hold] I wish to do 1 year project in linear algebra using Mathematica. What are linear algebra topics which can be implemented on Mathematica as part of 1 year graduate level dissertation. 1answer 71 views ### Region bounded by ellipse and line I have an ellipse defined either as algebraic or geometric: algebraic: ax^2 + bxy +cy^2 + dx +ey +f = 0 geometric: major Axis, minor Axis, x center, y center, rotation angle from horizontal And I ... 2answers 63 views ### Parametric Plots [continuous and discrete]: --showing parameter increase for multiple values of another parameter In my problem, I am effectively plotting a parametric function that depends also on an outside parameter, e.g., the real/imaginary parts of ... 1answer 160 views ### How to export figures with normal spacing in texts? My OS is Ubuntu 14.04, and I use MMA 10. I export a figure ploted in MMA to a pdf file and then import the pdf in Latex, here is the sreenshot As you can see, the spacing in the text is odd. But ... 0answers 22 views ### How to use RunProcess to run python interpreter In a related question How to use RunProcess to import external function? @taliesin provides a very nice answer illustrating using RunProcess to launch a GO http server. Has anyone, or does anyone ... 1answer 51 views ### How can I get “custom” controls to appear and behave like “default” controls in my Manipulate? For various reasons I need to define some controls in my Manipulate with complex behaviors that are not (or at least I don't think can be) accomplished using the ... 5answers 149 views ### Help going from iterative to functional The following code segment shows what I'd like to do. I'm a procedural programmer trying to learn the Mathematica functional style. Any help on this would be appreciated. ... 2answers 142 views ### How to track Part of Symbol or How to symbolize Parts of Symbol without copying data Let's create simple function: SetAttributes[h, HoldFirst]; h[data_] := Dynamic[Grid[data], TrackedSymbols :> {data}] test = RandomReal[1, {2, 2}]; h[test] ... 5answers 276 views ### Opposite of StringSplit What is an appropriate command that does the opposite of the following. StringSplit["a b c d e f g"," "] 2answers 113 views ### Inconsistent behavior of undocumented Encode->Import->StringToStream->Get on password-locked stream Let's save a definition. Encode it with password/key and Get it again. We will not use Get ... 1answer 63 views ### Comparing memory consumption of two pieces of code I have implemented something I want to do in two different ways, because I'm not sure which of the two approaches give best speed/memory efficiency. Comparing the speed of the two approaches is ... 2answers 162 views ### Perturbation theory with Mathematica: Definite integral of polynomial times exponential times hypergeometric function of imaginary argument I would like to ask also Mathematica users about my question from the math forum. To expand, I'm adding the code which calculates the full double integral for n=0 and \mu=0 (the second in the ... 1answer 93 views ### Problem adding boundary condition using DSolve [on hold] Here is the code: ... 2answers 43 views ### How to make legends in Graphics? To make an equilateral hexagon, here is my code in mathematica: ... 1answer 526 views ### Solve non linear system of equations I am trying to solve a system of two equations with two unknowns. In these equations I have, a part from constants: Unknown nr 1,$$D_{\perp}$$Unknown nr 2,$$\omega_C$$Known function of r: ... 3answers 236 views ### Windows command line arguments, stdin & stdout Is it possible to utilize all three: command line arguments, stdin, and stdout all at once in script for Windows? Unix is fairly easy, but I can't get the following to work with Windows. Using the ... 0answers 21 views ### How would I set the equation number for an EquationNumbered cell? Regardless of how many EquationNumbered cells are above or below, every new EquationNumbered cell that I add in my notebook shows (1) as the equation number. Is there a way to correct the equation ... 1answer 70 views ### Can Save[] produce a .nb file instead of a text file? (I use Mathematica 9.0.1 on OS X 10.10.2.) Suppose I have a notebook in which I make some definitions and assignments. ... 0answers 130 views ### Mathematica 10.1 availability [on hold] According to this post and this page of the Wolfram Documentation Center a new Mathematica version is on the way, if not already available to some user. It'll be v. 10.1 and, as such, a rather major ... 2answers 30 views ### Parallel evaluation hangs before doing anything [I use Mathematica 9.0.1.0 on OS X Yosemite 10.10.2.] I am experiencing difficulty with parallel evaluation that I am finding extremely perplexing to troubleshoot. I define the following function in ... 1answer 175 views ### Lagrange Multiplier We are asked to maximize and minimize f(x,y)=4xy, given the constraint 4x^2+y^2=8, using the Lagrange Multiplier method. First, I enter the functions f and g. ... 0answers 28 views ### DateObject from AbsoluteTime broken In the middle of a session (10.0.2 / Win64 / 2.7Gb working set - peak was over 7Gb) the form/definition for DateObject from an integer has disappeared. ... 1answer 153 views ### How do I prevent Mathematica from reformatting the expressions that I copy as LaTeX? When I choose something that looks like$$ W_1(1)=\rho ^{5} \omega _1 \rho ^{-5}\\ W_2(2)=\rho ^{23} \omega _2 \rho ^{-23}\\ W_3(3)=\rho ^{10} \omega _3 \rho ^{-10}\\ W_4(4)=\rho ^{9} \omega _4 \rho ...
I'm trying to export to $\TeX$ a Message cell. For example, after evaluating Sin[a,b], ...