8
votes
2answers
459 views

How do I create an ellipse bubble chart?

I have some data that I would like to plot as a bubble chart. The data is formatted as {{val1_mean,val1_sd,val2_mean,val2_sd},{val1_mean,......}}. What I would like to do is plot a bubble chart where ...
5
votes
4answers
631 views

Arcs of rotation for angles

How can I draw trigonometric angles of any radian measure associated with the unit circle, complete with the x-axis and y-axis? How can I draw arcs of rotation inside positive or negative angles? Is ...
5
votes
0answers
300 views

Export matrix to $\LaTeX$ with style

Is it possible to export a matrix to $\LaTeX$ with style? For example this code will create a matrix with equal spacing matrix and with background colors in some cell, is it possible to export that ...
2
votes
2answers
810 views

Importing several huge files with headers & footers

having here several files in ASCII format http://ge.tt/91rv0Jf/v/0 I want to import, while removing headers and footers and then join the several lists. ...
3
votes
2answers
201 views

How to rewrite this function to be faster: Find sub-matrixes of boolean board which imply a given boolean pattern

I have Boolean matrix A (called "board") and Boolean matrix B with smaller dimensions (called "pattern"). I am trying to find sub-matrixes C of A such that C has same dimensions as B, and ...
3
votes
1answer
121 views

Defining an Implies operation that works for Boolean matrices

I have two Boolean matrices, that both have dimensions m x n. I want to create a function TableImplies, which would return True ...
2
votes
1answer
224 views

Custom (Frame)Ticks fail when using Mathematica's script engine

I want to define my own ticks in a DateListPlot. It works quite well when I use the code in a Mathematica Notebook but breaks somehow when using it via ...
1
vote
3answers
84 views

Edit AxesLabel from an existing plot

I have a really complex function that takes a few hours to plot as a function of a parameter. Few days later I realised that I named the axes wrong. Is there an easy way to edit the AxesLabels without ...
2
votes
1answer
216 views

How to integrate ParametricNDSolve solution with respect to a parameter?

I have just upgraded to the new version of Mathematica because of its new built-in ParametricNDSolve function. I need to solve a first-order non-linear ordinary ...
2
votes
4answers
310 views

Problem with WhenEvent

I am trying to add a time dependent fraction to a parameter in NDSolve, i.e. when 10 < t< 20, add ...
0
votes
0answers
33 views

Plot derivative of integral with changing limits [duplicate]

My code is: Plot[D[Integrate[E^(t*(-x^2)),{x,t+2,t^2}],t],{t,-2,3}]. The errors/warnings are: ...
0
votes
2answers
664 views

Network database access - How do I connect to a remote database?

I am able to connect to a specific MS Access Database when it is on the same Windows computer as Mathematica via the command ...
1
vote
2answers
148 views

Manipulate keeps replaying the animation non-stop

I made a notebook with the following code, but for some reason when I evaluate it it keeps replaying repeatedly. What is causing this? Thanks. ...
11
votes
2answers
2k views

Graphics3D: Finding intersection of 3d objects and lines

I found these two nice links 1) intersecting graphics 2) Implementation of Balaban's Line intersection algorithm in Mathematica which works for 2d. However, I need to find whether a ray(line) ...
8
votes
1answer
766 views

How do I get Mathematica to show a number in non-exponential form? [duplicate]

Sometimes I make a calculation in Mathematica that produces a big number, which Mathematica shows like so: -1.52522*10^7 This is annoying to me, because I want ...
0
votes
2answers
116 views

help with StringJoin [duplicate]

dollarWon := 100 "(" <> Style["$" <> ToString[dollarWon], If[dollarWon >= 0, Darker[Green], Red]] <> ")" I am getting an error: String ...
4
votes
3answers
377 views

How to find the minimum of this constrained expression?

Let $x$, $y$, $z$ be three nonegative real numbers and $x^2 + y^2 + z^2 = 5.$ Find the minimum of the expression $$E=\dfrac{1}{2}x^2 y^2 + y^2 z^2 + z^2 x^2 + \dfrac{96}{x + y + z + 1}.$$ I tried ...
2
votes
1answer
262 views

How do I manipulate a 3D point plot?

I currently have a recursion done in 3D. At the moment, I am able to manipulate the points, but I cannot use "Joined->True" to connect them Currently this is what I have ...
2
votes
0answers
59 views

How to retroactively merge cell change history according to a merge interval

I recently noted that there is an option in the options inspector to set a merge interval for cell changes. This (I think) prevents a quick series of changes from spamming your notebook history with a ...
1
vote
2answers
269 views

Help with 1-dimensional random walk [closed]

I would like to simulate the evolution of a bankroll of a 2 player game where you have the probability of winning p. If a player wins, the bankroll grows by 1 unit minus a fee that each player pays, ...
3
votes
2answers
103 views

Select gives different answers in versions 8 and 9

Consider the code below: s = Solve[(3 - Cos[4*x])*(Sin[x] - Cos[x]) == 2, x, InverseFunctions -> True]; Select[s[[All, 1, 2]], Element[#, Reals] &] In MMA ...
5
votes
4answers
414 views

Any rule of thumb for converting a simple mathematical expression into a pure function?

By simple mathematical expression I mean one with a few functions and few variables copied into MMA in a mechanical way from a math book. For example this one, giving the distance between two points ...
0
votes
1answer
51 views

float output left in CDF

I'm experimenting with embedding a CDF on a Wordpress site and while it mostly works, the plots are running out of room along the right edge. It seems like if the images were floated left they would ...
0
votes
1answer
293 views

Mathematica command for type checking?

I have a program where users can enter mathematica commands that can evaluate to any of the standard numeric types (complex, real, int, etc.), or to boolean values. Moreover the users can enter ...
4
votes
1answer
4k views

How to graph a sphere with cartesian equations?

I'm new to Mathematica and I need to ask how to graph a sphere, cylinder, etc.. using cartesian equations. For example in sphere's case $x^2+y^2+z^2=1$ I tried to use ...
15
votes
3answers
614 views

Select performance

I am fairly new to mathematica and working my way thru Paul Wellins book on Mathematica programming so experimenting with various language constructs. I was experimenting with ...
1
vote
1answer
267 views

how to show value of y-axis value using manipulate to select x-axis value

How to add a slider for the x-axis that shows the value of the y-axis based on the position of the slider. Basically providing the result of the probably given a specific lot percent defective, lpd ...
13
votes
2answers
1k views

Basins of Attraction

How does one shade the basin(s) of attraction of a phase plot in Mathematica? I have been trying to do this using the system $$\begin{align*} \dot x &= y\\ \dot y &= -9\sin(x) - 0.20y ...
2
votes
1answer
145 views

How can I place gui controls inside Grid? [duplicate]

In all my apps, I am facing a problem about placing the Gui controls inside Grid. For this purpose, I wrote three functions. The first function, ...
3
votes
1answer
543 views

Legend for ListContourPlot

Consider this example below for ListContourPlot. ListContourPlot[ Table[Sin[j^2 + i], {i, 0, Pi, 0.02}, {j, 0, Pi, 0.02}], PlotLegends -> Automatic] I ...
38
votes
5answers
4k views

How can this image (optical illusion) be created with Mathematica?

I came across this image the other day: and liked the sensation of it pulsing. I was wondering if anyone would know how to create something similar with Mathematica (without the Pink Floyd Dark ...
1
vote
1answer
450 views

How to run Mathematica using Mac Terminal

My question is so trivial and I'm sure most people in here know exactly how to do this, however I still don't know how to run Mathematica in Mac terminal! I need to use all the cores of my computer ...
3
votes
1answer
499 views

NDSolve for a large system of simple ODEs

I am solving a system of many (more than 100) ODEs. It is the kind of standard rate equation encountered in semiconductor physics. Here is the system: ...
5
votes
1answer
121 views

Is there a way to prevent audio from becoming out of sync with graphics?

The code below could be used to say help Pre-Kindergarten and Kindergarten children learn about the numerals and numbers from one to 9. The problem is that this age group would be prone to just ...
3
votes
3answers
288 views

How to extract phase angle from sinusoid

I'm doing some electric circuit calcualtions and I'm trying to get the phasor representation of some arbitrary function of Sin or Cos. Could be complex like: ...
1
vote
1answer
61 views

Control formatting of a Text element in a plot?

Is it possible to define the format for a part of Text in a plot? For instance, is it possible to have v bold and ...
7
votes
4answers
483 views

How can I shorten this code to rotate a line segment around its center?

I have a list of line segments stored in the form: { {{x11,y11},{x12,y12}} , {{x21,y21},{x22,y22}} , ... , {{xn1,yn1},{xn2,yn2}} } Now I want to rotate all of ...
7
votes
0answers
413 views

Creating and using an explicit piecewise function in a convenient way

I have a set of data points that define a function in the form curvePts = {data1,data2,...} where ...
13
votes
1answer
328 views

Why does Mathematica give an incorrect answer to this multiple integral?

This is not a new problem but I would like to understand why Mathematica gives the result that it does. (Volume of a hypersphere) ...
3
votes
2answers
255 views

how to Export raster data as a tiff unmolested

I feel certain there is a simple answere here.. how do I export image data to a tiff without any scaling? I want to read back in the exact data. ...
3
votes
1answer
119 views

Use NotebookWrite with Graphics?

I am trying to use NotebookWrite to paste a plot into another notebook. The code looks something like: ...
0
votes
1answer
122 views

How to obtain an approximate function for SmoothHistogram3D?

I have a random distribution of points in the $x\!-\!y$ plane. I can obtain a graphical representation of the probability distribution function using ...
4
votes
1answer
320 views

Error trying to open a notebook in Wolfram Workbench [duplicate]

I recently set up Mathematica 9.0.1 on a new computer, along with x64 Eclipse Indigo with JRE 1.7, and the Wolfram Workbench 2 plug-in. Something is amiss, because when I try to do any sort of task ...
2
votes
1answer
197 views

A basic problem with Solve

I have this equation: 4b*Cos[2t]-4a*Sin[2t]==4Cos[2t]+8Sin[2t] Which I would like to solve. Without using mathematica, you can pretty easily see that a = -2 and ...
3
votes
1answer
187 views

Differentiating ParametricNDSolve solutions

Is there any way to differentiate a solution obtained by ParametricNDSolve? For instance, I have the position $\phi_\gamma(t)$ as a function of time, parametrized ...
6
votes
1answer
703 views

Smoothing/Averaging 2D Vector Fields

I have a list of 2D vectors defined by {{x,y},{u,v}} and would like to smooth or average the vectors. For example here are 2 vector fields, the second has noise ...
8
votes
3answers
229 views

Declaration of abstract matrices to perform series expansion on them

I would like to have abstract matrices M and S to get out the coefficients of matrix power series however it treats M and S as numbers even if i checked that M.S - S.M != 0. I attach my code below: ...
3
votes
1answer
126 views

FrameTicks given through Show does not work with LogLogPlot

This is similar to the closed topic: Frame ticks for a Log Log plot [closed]. Let me reuse (rm -rf)'s example here. FrameTicks given through Show does not appear if used with LogLogPlot: ...
3
votes
2answers
244 views

Mathematica does not understand (R^3)^(1/3) is the same as R [closed]

In the output from a calculation in mathematica stands a/((R^3*c)^(1/3)), with c and a ...
0
votes
2answers
695 views

Why function cannot be defined inside For loop? [closed]

I have a following code (which is simplified version of what I am doing): For[i = 1, i <= 5, i++, f[x_] := Sin[x]^2 Print[{i, f[i]}] ] And the question ...

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