0
votes
1answer
16 views

More than one graphic in Graphics command

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
35 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
26 views

In WolframAlpha, how can I make a Scatter Plot without connecting points?

How do I plot a list of points without connecting the dots in WolframAlpha? I tried, for example, ...
0
votes
2answers
22 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
1answer
33 views

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

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

How to clear mathematica's storage after a large computation?

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
0answers
25 views

White Edges Around Graphics Elements

Using the following code, I am able to generate a grayscale Voronoi diagram: ...
0
votes
1answer
24 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
36 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: ...
0
votes
1answer
38 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 ...
-2
votes
0answers
42 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 ...
-2
votes
0answers
35 views
4
votes
0answers
34 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
27 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
22 views

STL exports as flat rectangle

I have this code to graph a 3D surface and fill it to the axis: ...
1
vote
2answers
90 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 ...
5
votes
1answer
57 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
15 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: ...
4
votes
4answers
134 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
25 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
27 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
28 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
65 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
16 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
35 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
35 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
16 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.
0
votes
0answers
18 views

Strange behaviour of suggestion bar to solve an ODE

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
51 views

Integrate fails for generic parameters but works for any specific values

I was trying to get the following integral ...
6
votes
1answer
48 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
43 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
25 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
23 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
40 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
48 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 ...
10
votes
2answers
153 views

Can't inject EncryptedObject

Here are minimal examples: ...
1
vote
0answers
41 views

FrontEndObject::notavail: error when using math

I am new to mathematica script and thus I don't know whether this generated error is natural or not. When I write a command such as echo "3" | math in the ...
0
votes
0answers
25 views

Find volume of a translated and rotated ellipsoid below xy (horizontal) plane

I am trying to find the volume of the lower part (above horizontal plane) of an ellipsoid that is clipped by the horizontal (or x-y) plane. This ellipsoid is also translated (i.e. origin is not at ...
0
votes
0answers
43 views

Phase space plot [on hold]

I solve a dynamical system problem using NDSolve. I plot the results using ParametricPlot. Is there any way that I could get a ...
3
votes
2answers
103 views

How do I plot my country map with weather data stations?

I've tried this code, but I can't plot the coordinates in my country map. ...
-4
votes
0answers
24 views

Plot a simple line x=t^3 + c [on hold]

I know mathematica has a plot function but it's not giving me what I want. Using the above equation, how do I get Mathematica to generate a plot of lines for different t and c values?
0
votes
0answers
16 views

Symbol-handling, force-replace instanced variables [duplicate]

Currently I am stuck with the issue of renaming an instanced variable like r1$23314 to a global one. This issue arises as I need to use a "localizeAll" Module in ...
0
votes
1answer
34 views
4
votes
2answers
83 views

Coarse-graining in numerical integrations

I have been working recently in a coarse-graining problem I found when using NIntegrate: I am trying to evaluate the function $$f(a)=\int_0^{\infty}x\,e^{-(a^2+b^2)x^2}\text{d}x$$ numerically as a ...
0
votes
1answer
50 views

Copy and Paste Equations Mathematica

How do I export a pdf from Mathematica such that I can paste the code back into Mathematica and restore the formatting. Related: ...
1
vote
0answers
43 views

Twilight Zelda Guardian Puzzle : Shortest Path Proof [on hold]

I'm playing a video game right now and in it is a puzzle (see here). There are solutions to solving it (see here) on the Internet, but I'd like to know if this path is the shortest path (least amount ...
1
vote
0answers
37 views

Removing gutter shadows from scanned pages

I am new to image processing, and I was hoping someone might set me in the right direction. I am trying to create a simple toolkit for personal use for digitizing scanned book images into a database. ...
0
votes
1answer
38 views
1
vote
2answers
33 views

Dimensions of pdf generated by Export[…]

I'm trying to export a Grid table to pdf. When I display the table in the notebook, it has a very long aspect ratio, which I want to preserve in the pdf. However, ...
-2
votes
0answers
28 views

Find the Inverse z(x) in applies z(x)/z(x-1) = y [on hold]

If we know z(x) the zeta function, and applies z(x)/z(x-1) = y. Find the Inverse z(x) i.e z^-1(y) = x

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