0
votes
0answers
13 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
22 views

Billiard in square

...
3
votes
0answers
19 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
15 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
18 views

STL exports as flat rectangle

I have this code to graph a 3D surface and fill it to the axis: ...
1
vote
2answers
65 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 ...
2
votes
1answer
37 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
11 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: ...
3
votes
3answers
54 views

How to make a 3D curve fit 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
17 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
25 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
24 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
56 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
15 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 ...
-2
votes
0answers
29 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
33 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
17 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
48 views

Integrate fails for generic parameters but works for any specific values

I was trying to get the following integral ...
6
votes
1answer
47 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
39 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
22 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
39 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
44 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
140 views

Can't inject EncryptedObject

Here are minimal examples: ...
1
vote
0answers
31 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
24 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
42 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
100 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 ...
-2
votes
0answers
59 views

Rotate Object in C [on hold]

I try to rotate an object(rectangle) in C with variables : int left=100,top=100,right=300,bottom=200,deg=0; ...
0
votes
1answer
34 views
4
votes
2answers
72 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
49 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
41 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 ...
0
votes
0answers
35 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
37 views
1
vote
2answers
29 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
6
votes
3answers
209 views

List and patterns

Given some tuple $\{N,M,L\}$ such that $N\geq M\geq L\geq 0$ and $N>0$, how can I generate all tuples $\{n,m,l\}$ such that $n\geq m\geq l\geq 0$ and such that ...
3
votes
1answer
50 views

How to make new line in mathematica file output?

I know that new line is classically made by "\n". I want to make a string with lines of data and then export it into a file: ...
0
votes
0answers
24 views

Subtracting Series

When I input the following $\sum_{n=0}^{m+1}x[n]-\sum_{n=0}^{m}x[n]$ which in InputForm is: Sum[x[n], {n, 1, 1 + m}] - Sum[x[n], {n, 1, m}] it returns ...
0
votes
1answer
27 views

What is Duration in MonitorLM output?

What is duration specified in MonitorLM output? Is it start hour and minutes or is it total number of hours and minutes used?
1
vote
2answers
33 views
2
votes
1answer
68 views

Barchart recognize time series data?

I can't seem to get Barchart to recognize TimeSeries data. For example, my data is: {{1891, 1}, {1892, 1}, {1897, 1}, {1898, 1}, {1903, 1}, {1904, 1}, {1905, 1}, {1908, 4}, {1909, 6}, {1910, ...
0
votes
2answers
45 views

Express recursion formula by Nest function

I'm fairly new to Mathematica and I have to express a formula by Mathematicas Nest-function. I'd like to find the solution for my formula by my own, thats why I ...
1
vote
3answers
80 views

2D Interpolation of data file

I hae a datafile with 5 columns of the structure: x_i f(x_i,y_1) f(x_i,y_2) f(x_i,y_3) f(x_i,y_3) f(x_i,y_4) with i = 1 to about 100. Thus there are about ...
2
votes
1answer
46 views

Mathematica - Count number of zeros of a function in an interval

Let's say I have a function, F[x_,d_] = Sqrt[(x^2 - 1)^2 + d^2], and I want to count how many roots (no root, or one root, or two roots etc.) it has in an ...

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