# All Questions

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 ...
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 ...
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, ...
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] ...
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 ...
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 ...
0answers
25 views

### White Edges Around Graphics Elements

Using the following code, I am able to generate a grayscale Voronoi diagram: ...
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 ...
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: ...
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 ...
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 ...
0answers
35 views

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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. ...
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 ...
0answers
22 views

### STL exports as flat rectangle

I have this code to graph a 3D surface and fill it to the axis: ...
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 ...
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 ...
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: ...
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 ...
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? ...
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}}} ...
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: ...
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, ...
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 ...
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 ...
0answers
35 views

### Optimization of custom probability distibutions?

Consider the two tests: Timing[Do[RandomVariate[NormalDistribution[0.5, 0.3]], {200}]] {0.001188, Null} ...
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.
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 ...
2answers
51 views

### Integrate fails for generic parameters but works for any specific values

I was trying to get the following integral ...
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 ...
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 ...
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 ...
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. ...
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: ...
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 ...
2answers
153 views

### Can't inject EncryptedObject

Here are minimal examples: ...
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 ...
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 ...
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 ...
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. ...
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?
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 ...
1answer
34 views

### Why won't the Rule work? And how to apply it to a combination of variables?

I want to convert SI to Gaussian units given vectors: ...
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 ...
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: ...
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 ...
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. ...
1answer
38 views

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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, ...
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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