# All Questions

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### Make a grid of lines with a For[] loop inside a manipulate statement

can anyone help me?. I'm tring to write a Manipulate[] statement that can be able to modify a grid of lines in length, height and change the space between them. It should look like this
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Downstream of a long process I got the following function: $\begin{cases} 0 & x < 0 \, \vee \, x > \frac{307}{400} \\ 14.27-7.44\,x & 0 < x < \frac{307}{400} \\ \text{... 1answer 119 views ### How to relate memory usage with occupied positions of SparseArrays? What is the relation of memory usage of a SparseArray and the number of its occupied positions? Let's say you build a$100000000 \times 10$... 0answers 26 views ### Derivation of an interpolation function with multiple arguments I have the following interpolation function: f[x_,a_,b_]:=70 s[a,b][[1,1,2]][x] where s[a,b] is the solution of a ... 0answers 15 views ### How to extract the certain variable from output of coding Good day, Can anyone help me how can I extract the certain value from the output after run the coding. The output of the coding, ... 0answers 26 views ### Make NSolve faster by keeping only one solution Dear Mathematica users, NSolve usually returns all numerical solution it can find. When a variable is squared in some equation, ... 0answers 12 views ### How to highlight listplot data I plotted a data ListPlot[{{1,2,3},{4,5,6}}]. When I point the mouse over point {1}, it should appear at the end of the tooltip and the corresponding data point {4} ... 2answers 129 views ### Visualize Space Pascal's triangle Visualize Space Pascal's triangle I found this image on the web, I want to know how to draw with software. I try to search, found this. I have learned a mapping in the plane 0answers 14 views ### Can open mathematica in terminal, but kernal can't When I write mathematica in Terminal it works and I can use mathematica , but when I write math < test.txt It gives bash: math: command not found. where test.txt contains mathematica code. Can ... 1answer 64 views ### How to solve time dependent pde? I have set out to try and solve a time dependent wave equation with specific boundary conditions, but I am running into a bit of a snag. As you can see, I am trying to solve for the wave function u[t, ... 2answers 518 views ### How can I generate an interrupted projection of a world map? How can I generate a world map like the one here, but for an arbitrary hand-drawn map? For example, starting from scratch, how can I manipulate this world map to get something that looks like ... 2answers 136 views ### How to find Eigenvalues of Sturm-Liouville problem? Getting wrong Imaginary Eigenvalues I want to find Eigenvalues of following Sturm-Liouville problem D[(2 - MA/κ[s]) q'[s], s] + W Ω^2 q[s] == 0, Where Ω^2 is the ... 0answers 57 views ### Robust FindRoot search I have the following simulation that models a rocket landing (flat Earth, no atmosphere, constant gravitational acceleration), which uses root finding to figure out when to start and stop the engines ... 2answers 52 views ### Large matrix: Finding eigenvalues and ordering it with respec to the highest coefficient of its eigenvectors I have a 900x900 matrix to diagonalize. After diagonalizing it, I have a table of eigenvalues and eigenvectors. For convenience, I start with 3x3 matrix. ... 5answers 586 views ### Elegant method of generating this matrix? Good evening, I need to determine an elegant (as possible) method of computing an$n\times n$matrix below (the matrix shown is just a$16\times16$example). I've been toying with ... 3answers 371 views ### Converting a Sierpinski tetrahedron to a Graph I need a representation of a 3D Sierpinski gasket in a form of a graph to perform some simulations on. The 2D version is included in GraphData[], but the 3D one is ... 1answer 40 views ### Showing a polygon in Mathematica Could anyone be able to construct two shapes, a$n$-gon$P$and a regular$n$-gon$Q$, say$n=5$? 2answers 71 views ### Build nested function By running the following code: ... 1answer 55 views ### Working with DynamicModule: SetDelayed + OwnValues Shortly, definitions in form of e.g. x:= RandomReal[] have to be avoided inside DynamicModule[{x}, ...]. Minimal example, this <... 1answer 27 views ### CountryData function I under that Mathematica are able to extract data from a cloud/ online sources. Pardon the improper use of jargon for programming and IT is not my area of familiarity. Are the data that Mathematica ... 1answer 279 views +50 ### How do I numerically evaluate and plot the Fabius function? The Fabius function is a well-known example in analysis of a non-analytic function that is infinitely differentiable. I want to be able to numerically evaluate the function for any real argument, as ... 1answer 37 views ### Infinite Sum - Result not correct for all cases? Evaluating the Sum Sum[a^i, {i, ∞}] yields -(a/(-1 + a)) which obviously only holds ... 1answer 33 views ### Trying to get the values of sliders from a module I generated n number of Sliders using the idea from Manipulate with a variable number of sliders But I need the updated values of these sliders to use to evaluate ... 0answers 505 views ### Wavelet Transform Modulus Maxima (WTMM) method Has anyone already coded the Wavelet Transform Modulus Maxima (WTMM) method for computing the singular spectrum using multi fractal formalism in Mathematica? The goal is to analyse 1D, 2D and 3D data.... 1answer 61 views ### How to combine Nest and list Part I have a list$L$of Length$n\geq6$and a function$f$that, when applied to$L$, generates$n-5$lists$\mathscr{L}_i$of Length$n-1$(at the outermost level). I ... 1answer 28 views ### How can I plot the graph based on time from TimeUsed? Good day everyone, Can anyone help me how to plot the result using time from computer. Here, I used timeUSed to generate the time; ... 2answers 218 views ### planar Conic Sections plot Among answers of ConicsAssemblyQuery, I posted images that are not pretty. In particular, the parabola is elusive due to large parameter step. Please help. The program attempts to translate and ... 1answer 62 views ### NB loading code broken in MMA 10 is there a workaround? In MMA 9 I use the following code to load multiple nb's and close them after they are evaluated. In MMA 10 this code is broken. It appears that MMA 10 takes far longer to evaluate the code than the ... 1answer 90 views ### Why does RegionUnion fail for these Regions? Bug introduced in V10.0 and persisting through 10.4.1. Introduction Lately, I asked for a solution to inflate and unite a List of BoundaryMeshRegions: Inflate ... 1answer 110 views ### What's reliable way of finding declared but undefined functions/symbols in several interrelated packages? I have many packages some of which use some of others. I have many symbols defined in them. Is there a reliable way of finding declared/exported but undefined functions/symbols in several ... 3answers 83 views ### Transformation rule for arbitrary number of argument expressions I am failing to write a Mathematica transformation rule that replaces e.g. f[a + 3, b + 3, c + 3] with f[a, b, c] + 3 for an ... 1answer 61 views ### Interactive plot of Van der Pol oscillator [on hold] ... 2answers 2k views ### Trying to visualize the Collatz conjecture I happen to have this collatz collatz[x_, y_] := If[x == 3*y || x == 2*y + 1 || y == 3*x || y == 2*x + 2, 2, 0] So i want a visual 3D adjacency graph of my ... 0answers 70 views ### What has changed in pattern matching functions with the Orderless attribute? In making an attempt to answer this question, we ran into a version-dependent pattern-matching issue. An extended discussion in the comments transpired, and some inconsistencies arose. Consider the ... 3answers 559 views ### Can Mathematica produce manipulatable 3D plots for deployment on the web? I have a 3D plot I produced in Mathematica and I would like to share it with the world in a way that allows my audience to rotate it and interact with it in the broadest possible way. I would like ... 0answers 26 views ### Filling between two plots up to some boundaries only [duplicate] Suppose I have plotted two functions$f(x)$and$g(x)$on the same plot. I would like to shade the area between the two curves only when$f(x) \geq g(x)$, but I cannot get the Filling command to do ... 1answer 87 views ### Solving and Plotting Infinite sums over solutions to transcendental equation involving Bessel functions I am trying to use Mathematica to plot the following equation$E(q,\Delta)$vs$qa$, for set values of$ D \Delta/a^2$and$\bar\rho a/D$. I have looked at other stackexchange posts which deal with ... 1answer 48 views ### Using Interval Slider in Manipulate for Plot Functionality I am trying to incorporate Interval Sliders in Manipulate to allow the user to select a range to view a given plot. Here is an example that I have constructed for ... 3answers 71 views ### Using a function from inside a module [duplicate] I try to plot a function for special values of some parameters which I don't want to set globally: ... 0answers 50 views ### Make integration/ plot run faster? (takes hours) I am using Mathematica 10.0.2.0. Here is the code I am working with: ... 1answer 34 views ### Max iterations for NestWhileList [on hold] I'm writing Turing machines with a halting state. Many of these tms will never reach the halt state and I want a way to tweak NestWhileList so it runs a max of$n$... 2answers 59 views ### Translation especially in graphics By running the following code: ... 0answers 34 views ### Create n number of sliders with push of a button I am trying to create an app and a part of it I want to plot 2D slices of n dimensional data. For that purpose I ask the user which plane he/she wants to use and change the other dimensions with a ... 0answers 44 views ### Mathematica, stop sorting my output! [on hold] I'm trying to get some output from Mathematica / WolframAlpha, but it's coming out in a useless format. Mathematica is, for some reason, sorting my output. Below is the output from my function and ... 0answers 61 views ### Complex function plot issue [on hold] I am plotting the real part of a simple complex function defined in two equivalent ways, and the plots do not agree. ... 0answers 32 views ### \$MinNumber vs. \\$MinMachineNumber [on hold]

I'm working on some code that is giving me a division by 0 error, but I don't think I'm dividing by any functions that could come out to be 0. At one point it was suggested that this could be caused ...
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### Does Mathematica have built-in support for multivariate regression?

I know that LinearModelFit can generate a model of a single response variable as a function of a set in input variables. Does Mathematica provide support for ...
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### Building a Career Ladder Lattice (Follow up)

I want to thank you both for your help above. I'm going to abandon my quest for a number to label substitution using VertexRenderingFunction; because I need the ...