0
votes
0answers
5 views

How to make $xy$ function graphic like maple

I plot $xy$ function in maple plot3d(x*y, grid = [10, 10], color = "Red", style = pointline,axes = framed) how to make same graphic in Mathematica? ...
0
votes
0answers
6 views

Naive question on ODE numerical solving and periodic initial conditions

I have a second-order nonlinear ODE for which I would like to find a numerical solution, with periodic initial (boundary) conditions. Can this be done directly with ...
0
votes
0answers
6 views

Finding the magnitude a matrices

I need some help. I have a list of 3 x 3 matrices of real numbers.I want to find how close each of these matrices are to a {{0,0,0},{0,0,0},{0,0,0}} matrix. Any suggestions to a method algorithm or ...
-1
votes
0answers
10 views

Expectation of Rician Distributed Data [on hold]

As you can see in the attached file, I'm trying to obtain the expectation of some Rician distributed symbolic data. However output and input are the same. I guess that happens because Mathematica is ...
2
votes
1answer
22 views

Strange behavior of StringReplace, same expression evaluated differently

I have two expressions which are exactly same: StringReplace["in the next few days", {"in" -> "ffdsf"}] and ...
0
votes
0answers
9 views

Interpolation function inside a numerical integral

Hello all and thanks in advance for your comments, I will be brief to explain my doubt. If you need any more information, please ask me. I have an interpolation function which comes from the ...
3
votes
1answer
33 views

Calculate area of apple from image

I want to find area of following apple I want to do something like this: define boundary region of apple apple=... then find area using only ...
0
votes
0answers
11 views

Amelioration of a GraphPlot

In the following graph ...
0
votes
0answers
17 views

2d numerical integration

I'm trying to get a numerical solution for a double integral: ...
-1
votes
2answers
19 views

Derivative of a 2D Interpolating function

I cannot find a way to obtain the partial derivatives of a 2D Interpolating Function obtained with ListInterpolation. I didn't find anything useful on the web. Any ...
1
vote
1answer
23 views

Place Legend above Epilog

I am currently struggling with a problem which I haven't seen answered anywhere else. I want to make a ListDensityPlot graph in which I need to draw some ...
-2
votes
0answers
20 views

How to find vertice by two angles and side?

I know 'alpha', 'betta', length 'c', vertices: 'A' and 'B' How can i find the 'C'?
0
votes
0answers
24 views

Shortest[] didn't work for StringReplace for shortest consistent match if whiteSpace involved [duplicate]

This is a problem related to How to use StringReplace "from bottom to global"? The answer of @J.M. works well for "<...>" styles : ...
-1
votes
0answers
18 views

Asked a question before signing up and can not sign in back [migrated]

Yesterday I asked my first question on mathematica.stackexchange, but being as an unregistered user at that moment. Then I confirmed my email and would like to express my gratitude and note the ...
2
votes
0answers
29 views
1
vote
0answers
19 views

RegionPlot with rank constraint

I am trying to plot the feasible region of a rank constrained semidefinite program shown below: The Mathematica code that I am using is the following: ...
1
vote
1answer
87 views

The new introduced EulerMatrix problem

In the present version of Mathematica, there is a new command EulerMatrix[{α, β, γ}])// MatrixForm I read its document and I still don't understand it. For me, ...
0
votes
0answers
28 views

Transforming Determinant to Polynomial Expression

I have determinant which equals zero. In determinant, i have x expressions. i want to transform the determinant to polynomial expression so i can solve that with mathematica. Note : Apologize for ...
1
vote
3answers
104 views

Solving my graduation exam geometry problems with Mathematica [on hold]

How capable is Mathematica when it comes to typical school geometry problems? Is there a way to throw constraints at it and get it to spit out a solution? Here are two geometry problems from my ...
5
votes
1answer
43 views

Query or MapAt ragged associations or ignoring Missing values

Related to this question, can functions be mapped to named Keys in ragged lists of Associations? ...
1
vote
1answer
31 views

NDSolve for complex variables

I am trying to simulate a multiple pendulum system with damping as follows: ...
2
votes
1answer
44 views

Using Associations and Pattern matching in numerical functions broken

It looks like the very young feature of pattern matching (/replacing) within Associations (http://mathematica.stackexchange.com/a/119542/6804), with or without ...
0
votes
1answer
39 views

Integration of a function of interpolating functions

I need to calculate the integral of a function of interpolating functions. Being more specific, the function I want to integrate is the following ...
2
votes
2answers
40 views

Find a specific function in several notebooks

I searched several questions in this forum about: How to search a specific function ... For example, I have a folder with several notebooks. And several of these notebooks, I used, for instance, <...
4
votes
3answers
309 views

How to color the edges of a triangle?

I'd like to draw a triangle (given the side lengths) with the sides colored separately. I tried ...
4
votes
2answers
44 views

Association matching still not working perfectly?

Up until 10.4 you could not match on internal Association structure at all: http://mathematica.stackexchange.com/a/119542/6804 Now you can, but it seems flawed ...
7
votes
3answers
491 views

Graphics of Ebbinghaus illusion

I define two graphics for Ebbinghaus illusion ...
2
votes
2answers
49 views

Finding Real Roots and Determining Range

I am interested in determining the minimum and maximum values of the real roots of polynomials of form $P(x)=\sum_{k=0}^n a_{k} x^k$ where $n$ will have a defined value (say 3,4,5...) and $a_k$ are ...
2
votes
1answer
51 views

StringSplit on comma but ignore commas in quotes

I'm importing CSV files and some of the fields include quoted text with commas as part of the field, rather than as a field separator. What is the syntax (or alternative method entirely) to import ...
0
votes
2answers
76 views

NonlinearModelFit with indexed parameters

I have an instrument calibration problem for a multi-channel instrument. Some of the calibration parameters are common between channels, while others are per-channel. Toy example: ...
0
votes
0answers
50 views

Adding a random shock to a sine wave [on hold]

I have the following sine wave generated: Plot[Sin[2 Pi*x], {x, 0, 1}] How can I add a random value to this function generated from the Guassian distribution?
6
votes
2answers
293 views

Cross product between two lists of vectors

I'm trying to create a function that does the cross product between two lists of the same dimensions, element by element. Each entry of the list is a 3D vector. Something like this: ...
0
votes
0answers
36 views

Graphics3D and Postscript

When trying to export a figure with Graphics3D to postscript, I get abysmal results seen in the attached image. The image on the left is what I see in Mathematica. The image on the right is the ...
0
votes
0answers
50 views

Waveguide along a curve

I have a parametric equation of the curve and several moving frames on it. I would like to move some cross-section (not circular) along the curve with respect to the normals of the frame. E.g. let the ...
0
votes
2answers
52 views

Get slope of linear fit

This may seem silly, but I've been crazy for the last hour trying to find a way to automate the linear fit of my data. All I need is the slope. Say I have some data ...
-2
votes
0answers
29 views

How to manipulate this? [duplicate]

I tried to code this, but everytime I code I failed. Im not sure what I did wrong and Im fairly new to Mathematica. Can you guys check it out? ...
3
votes
1answer
31 views
0
votes
0answers
31 views

Transform an expression into a function [on hold]

I have a matrix of the form Mat = {{2a, 7a},{5a, 3a},{a, 2a}} (the actual matrix is a hugely complicated one of size 64x64, but the idea is exactly the same). I ...
1
vote
1answer
58 views

Einstein summation and traditional form of partial derivative of implicit function

I am quite new in Mathematica (1 week new) and after many trials I did not manage to make my partial derivatives to look traditional way. There are few topics such as How to make traditional output ...
-3
votes
0answers
55 views

Can Mathematica solve inverse laplace transform

Laplace transform is $\mathcal{L}(s)=\exp(-2 \pi s^{1/a}\int_{0}^{y/(s)^{1/a}} \frac{x}{1+x^a}dx )$ Do i solve inverse Laplace transform of $\mathcal{L}(s)$ or $\mathcal{L}^{-1}(s)$ or $\mathcal{L}(...
1
vote
2answers
31 views

ListAnimate — restore frames to original position after interaction during a pause

I have a ListAnimate where the frames consist of graphics made of lines and points. I want to make sure that, when the animation is paused and then resumed, all ...
1
vote
0answers
21 views

Make a .C3D file in Mathematica

I have two different groups of points in an excel file, which are captured by two different cameras from two different angles (Motion Capture Process). These points are extracted by using markers on a ...
-5
votes
1answer
54 views

Setting up teams to play in games [on hold]

Imagine there are 12 teams, numbered 1 through 12. There are 10 games those teams can compete in, with two teams needed per game. There are 10 rounds, and it is important that after the 10 rounds are ...
3
votes
1answer
48 views

How to create assignments to Overvector programmatically

I wish to write a function that accepts to lists. The 1st argument is a list of lists, holding the components of a several vectors. Ex.: comp = {{a, b}, {c, d}}. ...
1
vote
1answer
50 views

Weird SeriesData behavior?

I was trying to calculate the determinant of a matrix whose elements are truncated series. As a result I obtained an expression like this: ...
0
votes
1answer
41 views

How to make the conjugate transpose

I have a problem to make the conjugate and transpose the matrix.May anyone help me please. ...
5
votes
2answers
103 views

Plotting an equation describing a Joukowski airfoil

I am trying to plot an equation that will give me a Joukowski airfoil and am having trouble getting any results. The equation that I am using is as follows: ...
4
votes
1answer
72 views

DSolve apparently returns wrong symbolic result

Bug introduced in 9.0 and persisting through 10.4.1 I am trying to get Mathematica to calculate the correct solution $x(t)$ of the following ODE: $\dot x = a x(t)+ct^n$ for $a>0$, $n\ge 1$, $c&...
0
votes
1answer
72 views

How do you manipulate this in 2D

Use Manipulate to create an interactive plot that shows the parametrically-defined curve described by {x[t], y[t]} = {t Sin[t], t^2/15} for ...

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