All Questions

8 views

How to delete InterpolationFunction created by NDSolve/ParametricNDSolve?

I have faced a uncommon problem. The situation is that I need use ParametricNDSolve/ParametricNDSolveValue to solve ODEs system in the non-linear model fitting process. So every iteration generating a ...
9 views

Smooth Curve using Drawing Tools Palette

I am learning to use the drawing tools palette that comes packaged with Mathematica. I'm attempting to create some diagrams for class using Mathematica's drawing tools rather than Adobe. Is there ...
14 views

Why won't ImplicitRegion work with a custom distance function?

I am trying (in 10.0) to create a region from a list of data points. I have created myDistance to use as the boolean test for whether or not a point should be included in the region ...
21 views

String Question

Consider: listOfScores = Import["http://www.handsonstart.com/ExampleDataScores.txt", "Data"] Which gives this output: ...
17 views

Can I extract or deduce the effective input form to duplicate the results from an interactive toolbar?

The interactive toolbars that are available in 10.0+ are very nice for getting images to look the way I want; but the black box functionality is very un-Mathematica-like, and doesn't help me if I want ...
19 views

Attaching labels to the vertices of an Octahedron

How do you attach the labels (e1,e2,e3,e4,e5,e6) to all 6 vertices of the Octahedron below, ensuring that the labels of the first figure corresponds to the end ...
19 views

union several arrays of same flag(date for example) efficiently

Suppose I have several arrays from data files which look like: arrayi = {{datei1, xi11, xi21, ...}, {datei2, xi12, xi22, ...}, ..., {datein, xi1n, xi2n ,...}} ...
29 views

SubsetQ[] without ignoring duplicates

How could one create a code that checks whether a set is a subset of another, but not ignoring the duplicates? For example, $\{1,1,1\}$ would be a subset of $\{1,1,1,1\}$, but not vice versa. ...
40 views

How to solve 3rd ODE with this boundary conditions that is approaching infinity??I need to solve it numerically using Mathematica

Here are the code that I had tried but there is an error ...
28 views

Labeling the vertices of a graph

I would like to label the vertices of a complete graph alphabetically. But I am stuck because I don't know how to associate only one vertex to a letter. ...
16 views

Nestlist inside Compile

My question is a continuation of question1 and question2, but I think it may be considered as a self-contained one. I am interested to make the following code faster ...
83 views

Is there a more compact way to accomplish this: lst = {0,0,7}; idx = Position[lst, Except[0], 1, Heads -> False] // First // First (* => 3 *) For ...
80 views

119 views

Partial differential equation, Finite difference Method [on hold]

For my research project I am trying to solve following partial differential equation in Mathematica (V[r]*ψ[u, v])/4 + Derivative[1, 1][ψ][u, v] == 0 with ...
44 views

How to impose Assumptions for a list of variables?

I've got an \$Assumptions variable that I'd like to apply to my whole notebook, looking like so at the moment: ...
33 views

Cloud Mathematica error Ploting [on hold]

I have this code: po=18.5592; Plot[ 80/(1 + ((80 - po)/po)*E^(-0.5*t)),{t,1900,2015}] And this is supossed to be a logsitic equation but it isn´t ploting ...
93 views

position with multidimensional array

I have this code: ...