1
vote
3answers
65 views

Absolute VectorPlot scaling

I'm trying to visualize the vector components of a rotation matrix with absolute vector lengths. VectorScale help states that When using an explicit sfun, ...
0
votes
0answers
38 views

How to invert the default order of polynomial? [duplicate]

By default, Mathematica outputs polynomials starting with smallest degree. How can I invert this?
0
votes
0answers
17 views

Possible bug of Exporting as HTMLFragment at Linux

This is the result of Mathematica 10.0.2 of Linux Version. There are two style inside one tag, and this fragment cannot be Imported as XML by Mathematica. This is the result of Mathematica 10.1 of ...
1
vote
1answer
24 views

Truncating a List of Subsets of Ordered Pairs

I have a set of pairs: ...
0
votes
0answers
24 views

Definition of function for integration [on hold]

I have this function: g33[p_] = Integrate[1/(a - b) (a μ2[-p/b] + μ1'[-p/b] - 2 a g2'[(-a p)/b] - (a + b) g4'[-p]), {p, -l/b, 0}] And I want to call it with ...
0
votes
2answers
60 views

Returning value if a point is in a region?

I'm writing a function so that if the user clicks on a certain region, a value is returned. The function takes in a condition list like the one below and a point. ...
0
votes
0answers
44 views

How can I make a plot of integer lattice? [on hold]

I want to make a plot of complex plane with dots representing visible lattice points. I want the result represented somehow like this: ...
1
vote
4answers
105 views

Manipulating List?

I have a huge list with 1000 elements. Manually entering and calculating SUM of probabilities it would take a few hours. Example: list = {1, 2, 3, 3, 4, 3} ...
1
vote
0answers
25 views

ConnectedComponents problem of syntactic structure

In Mathematica 10, ConnectedComponent computes the list of vertices belonging to strongly connected components. In the following simple example with a graph with no edges, the result is as follows: ...
1
vote
1answer
66 views

Manipulate with plot and images

I have the following code: ...
0
votes
0answers
29 views

Package for symbolic computation of christoffel symbols and parallel transports in Riemannian geometry, given the metric

I've no knowledge in mathematica (but I do in matlab), but I'd really appreciate if someone could mention what is/are the best and easy to learn mathematica package(s) for symbolic and numerical ...
0
votes
0answers
25 views

PeriodogramArray or PowerSpectralDensity?

could anyone explain what is the difference between PowerSpectralDensity[data,omega] and PeriodogramArray[data]? When I plot them (starting from the same set of data of course) I get two different ...
0
votes
0answers
52 views

I made my own equation, how do I know if it already exists? [on hold]

I made my own equation after playing around with some numbers. So I started to look for the equation to be sure I made it first. I googled and searched for it almost everywhere but couldn't find it. ...
0
votes
0answers
60 views

Matrix iteration failing after second step

I am calculating 11x6 matrix using different logics as in below code. Problem is in Do loop in below code where I have two different criteria to update matrix "fd". I am expecting logic in IF which ...
2
votes
1answer
106 views

Plot a data of four dimension

I have a confusion recently about the visualization of data.the data you can get here.The construction of data is four dimension,like as {x,y,z,color},this is my current solution. ...
0
votes
1answer
32 views

More than one graphic in Graphics command [on hold]

another question regarding plotting. I'm sorry, but somehow it is superhard for me to use these. I have a Graphics plot and I want to add a Point to it. A circle is already working. But everything ...
0
votes
1answer
70 views

Arbitrary hollow cylinders in mathematica 9

I'm having trouble displaying a hollow cylinder in Mathematica 9. A hollow cylinder looks like this: I tried to use RevolutionPlot3D with a step function. It ...
1
vote
1answer
46 views

In WolframAlpha, how can I make a Scatter Plot without connecting points? [on hold]

How do I plot a list of points without connecting the dots in WolframAlpha? I tried, for example, ...
1
vote
3answers
65 views

NDSolve parametric plot

Here is my code. s = NDSolve[{f'''[x] + f[x]*f''[x] == 0, f[0] == A, f'[0] == 0, f'[10] == 1}, f, x] I want to plot f''[0] ...
1
vote
2answers
80 views

Numerical solution of IVP for linear ODE with variable coefficient runs wild soon

Cross posted in scicomp.SE. A friend of mine showed me this initial value problem (IVP) for a linear ordinary differential equation (ODE) with variable coefficient: $$y''(x)=\left(x^2-1\right) ...
0
votes
0answers
60 views

How to clear Mathematica's storage after a large computation? [on hold]

I've done some surfing and haven't found a solution to my problem... hopefully it is a simple one! Here is the problem. I have a Monte Carlo module that is stepping/tracking particles in a ...
1
vote
1answer
70 views

White Edges Around Graphics Elements

Using the following code, I am able to generate a grayscale Voronoi diagram: ...
0
votes
1answer
38 views

Replace element of matrix based on rule which invloves other element of same matrix

I am trying to replace 1s row of matrix d iteratively from right by multiplying last element in 1st row with (1-int*dt) to generate 2nd last element. The replacement continues till I reach the 1st ...
0
votes
2answers
59 views

Force Mathmatica to simplify an ArcTan[]?

I understand that there are many solutions that will produce the same arctangent, nevertheless I really need a simplification: ...
3
votes
1answer
96 views

Output an Expression in terms of GoldenRatio

Sorry if this is a dumb question (I'm new). I swear I searched and read forums first! I'm trying to rewrite expressions in terms of the Golden Ratio. For example, I know 9+4Sqrt[5] is Phi^6, but can ...
-2
votes
0answers
90 views

How to compute and plot an intersection?

When two surfaces (ParametricPlot3D based on two independent parameters or a CountourPlot3D or a Monge Plot3D with known formula) are placed and plotted together, how is the intersection line ...
-3
votes
0answers
94 views
4
votes
0answers
53 views

Trouble understanding TrackedSymbols

While developing a relatively complex demonstration for Manipulate I encountered the problem that my output was unintentionally self-updating in an endless loop. ...
2
votes
0answers
35 views

Tensors with mixed symmetry

I want to work with tensors of mixed symmetry, for example with a rank 3 tensor $A_{ijk}$ that is symmetric under the exchange of $i$ and $j$ and antisymmetric with respect to $i$ and $k$. I was ...
0
votes
0answers
23 views

STL exports as flat rectangle

I have this code to graph a 3D surface and fill it to the axis: ...
1
vote
2answers
111 views

How can I reshape my solutions to make a 3D plot?

I need some help on the following. I need to run Solve for multiple values of a and b. To do so instead of using Do, I use ...
7
votes
1answer
67 views

Applying a texture to part of a sphere

I am trying to texture a sphere with a picture of myself. I don't want it to be stretched across the whole sphere but only to appear on the front. I used ...
0
votes
0answers
17 views

How can I get the 1-ring neighbor of mesh triangle?

I have an .obj file. I import it into my mathematica and get the vertices and also triangles as follows: ...
5
votes
4answers
177 views

How to fit a surface to 3D data in Mathematica?

I have a set of data coordinates which is mostly compatible with an Ellipsoid: {{x1,y1,z1},{x2,y2,z2}, ... , {xn,yn,zn}} Now I want to find the best 3d volume ...
1
vote
0answers
33 views

How to make a widget float?

Is there an option or way to make a GUIKit window remain in on top of other application's windows? ...
0
votes
1answer
29 views

Replace parts of nested lists

I have list of stock data as follows: lis1= {{{1992/10/12, 126.946, ^AEX}, {1992/10/13, 127.85,^AEX}}, {{1992/10/12, 88.487, ^AFLI},{1992/10/13, 91.825,^AFLI}}} ...
-2
votes
1answer
33 views

Use two functions for x and y coordinates for a plot [on hold]

I try to make a plot out of two functions. It is a cycloid I want to plot. These are my two functions: ...
5
votes
1answer
76 views

Right Ascension and Declination in astronomical functions

In the process of answering this question, I was forced to confront the various astronomical coordinate systems used by Mathematica. Background In astronomy, positions of celestial objects (stars, ...
0
votes
0answers
22 views

Convert the output of solve into equality [duplicate]

I know this is has been asked before but seriously, none of the ones I checked helped because they referred to a single variable assignation. Apologies if this is a duplicate. I have many variables ...
-3
votes
0answers
38 views

How to calculate a linear regression on the HP 40gs calculator? [on hold]

I have a question like my title explained. I'm not really a fan of using this calculator but for my studys I have to. So for a simple example, how to I make a linear regression on the HP 40gs on the ...
2
votes
0answers
40 views

Optimization of custom probability distibutions?

Consider the two tests: Timing[Do[RandomVariate[NormalDistribution[0.5, 0.3]], {200}]] {0.001188, Null} ...
0
votes
0answers
19 views

Local SEnsitivity Analysis [on hold]

Would some one lead me to a reference where I could have a detailed idea about some local sensitivity analysis methods.
3
votes
0answers
32 views

Strange behaviour of suggestion bar to solve an ODE, potential bug

InputE^(-(1/2) x[t]^2) (Derivative[1][x][t]^2 - (x^\[Prime]\[Prime])[t]) == 0and evaluate, then press the solve ode button on the suggestion bar. It will return ...
2
votes
2answers
62 views

Integrate fails for generic parameters but works for any specific values

I was trying to get the following integral ...
6
votes
1answer
56 views

Completion in terminal?

I know that it is possible to run Mathematica in Terminal. But I didn't find a way to get completion work in Terminal. I mean completion by ...
0
votes
0answers
47 views

How to replace a part of array based on certain rules which involves usage of other array

I am trying to replace outermost column of array "fd" in below code. fd is matrix of dimension (nas1,nts) which is initially filled with 1. I want to replace outermost column of fd with result of Max ...
1
vote
1answer
28 views

Get Coefficient of polynomial excluding variables

I'd like to write a function that returns the coefficient of a polynomial, but excludes some 'cross-term' coefficients. The function could be called CoefficientExclude, and the first argument would ...
0
votes
1answer
27 views

Root: Simplifying symbolic expression

I'm doing calculations with a lot of symbols, which don't always gives nice expressions. Now I have a solution with a Root-expression, where the coefficients are symbolic, e.g. ...
1
vote
1answer
43 views

PlotLegends in ListPlot does not display different markers

I would like to plot a graph with the legends at its side. However, I have managed to plot the legends, but the markers do not match the one in plot (picture bellow): My code for that plot is: ...
3
votes
1answer
79 views

DynamicModule issues with Refresh, double evaluation, and CDF Player preview

I am in the middle of making a CDF for a calculation of many random variables. I've gone with DynamicModule and have read the documentation plus these posts: 32294 ...

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