Questions on creating visualizations from functions or data using high-level constructors such as Plot, ListPlot, Histogram, etc.

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7
votes
2answers
434 views

A topoplot function for Mathematica

Matlab's EEGlab toolbox has a topoplot function: http://sccn.ucsd.edu/eeglab/ A typical topographical plot of an EEG signal is given below: How can I reproduce this in Mathematica. I know that ...
3
votes
0answers
61 views

Bug when using Plot3D over an ImplicitRegion?

Evaluating this expression seems to cause Mathematica to beep and quit the kernel: ...
9
votes
1answer
362 views

Plotting a region with polar axes

I want to plot the region of points who satisfy the following equation: 2 < r <= 5 && 3/4 π < θ <= 5/4 π I have been able to plot region in ...
2
votes
2answers
85 views

InterplationOrder, ListPlot3D and using AbsoluteOption to find value used. Slow using InterpolationOrder

What lead to this, is when I noticed that ListPlot3D was much slower when adding a specific InterpolationOrder->n vs. not and ...
2
votes
1answer
82 views

Stochastic Approximation and Simulation using Running Median

I have a function $$F(X_{t+1},Y_{t}^{med})= \alpha X_{t+1} + (1-\alpha) Y_{t}^{med},$$ where $$Y_{t}^{med} = Median(Y_1, Y_2,... Y_t).$$ Moreover, $Y_1 = X_1$ and $Y_t = F(X_{t},Y_{t-1}^{med})$ ...
2
votes
3answers
164 views

Plot a one-dimensional list of numbers as a column/row of labeled colored squares

I have a list of numbers and a matching list of labels. I want to plot a column of colored squares, with the color of each square matching (in some color scale) the value of the corresponding number. ...
6
votes
1answer
225 views

ListPolarPlot: 0 Degree at vertical axis

Is it possible to have ListPolarPlot start plotting at the vertical axis? By Default ListPolarPlot gives this result: ...
3
votes
1answer
110 views

Filling dependence on order of points in ListPlot

ListPlot[{{{1, 0}, {0, 0.5}}, {{1, 1}, {0, 1}}}, Filling -> {1 -> {2}}, FillingStyle -> LightGray, Joined -> True, Frame -> True] Results in no ...
1
vote
2answers
128 views

How to do a region plot with many functions [duplicate]

Hello i am trying to compare many function, i want to see witch one as the lowest value depending on 2 variables. My solution so far is something like this: I have 7 function: P1 P2 P3 P4 P5 P6 P7, ...
4
votes
5answers
581 views

Ordering the Boundary points of a Polygon

I feel like this should be simple, but I keep running into walls. Say someone gives you the coordinates of the vertices of a pentagon and the center point of the hexagon. Is there any way to get an ...
6
votes
1answer
176 views

How to make Epilog render behind the main plot [duplicate]

Consider this example: ...
1
vote
1answer
120 views

Missing arrow tips and colors

My main problem is: I plotted a curve here, but the tip of some arrows are missing. Why does this happen, and how can I fix this? Not the main problem: Also, I once tried to make the arrows with ...
8
votes
5answers
509 views

What is my problem with MeshFunction?

I want plot the max value in a sine plot. We can use the following code ...
2
votes
2answers
121 views

Plot help with axes coordinates

Plot[{4 - 2 y, (5 + y)/3}, {y, 1, 10}] How do I make Mathematica tell me the coordinates for cuts with the y-axis, other than just looking at it?
6
votes
1answer
251 views

How to combine Plot and GeoGraphics?

I want to combine this map as "background" of this combined plot. How can I do it? The documentation doesn't show any similar demonstration. ...
4
votes
2answers
249 views

Adding a thick curve to a regionplot

Suppose we have the following simple RegionPlot: ...
4
votes
3answers
181 views

Plot failing over set domain with any functions

I'm here with a rather interesting problem which I have no clue how to fix. I am trying to plot a function: Plot[x && 0 <= x <= (1/8), {x,-9,9}] ...
5
votes
1answer
246 views

How to graph the revolution of solid limited by 2 points in x axis [duplicate]

I'm learning how use this program. And I have problem with how graph the solid of revolution.Here i write one exercise. y=2-1/2x, y=0,x=1,x=2; about the x-axis. This is the graph also the volume ...
9
votes
3answers
408 views

Torus triangulation

I'd like to plot something similar to this but with a triangle instead of a pentagon. Also, I'd like to triangulate the faces, that is, to insert the diagonals for each face of the 3 prisms used. In ...
4
votes
1answer
284 views

ArrayPlot copied to PDF shows blurred mesh [duplicate]

Certain (but not all) images displayed in ArrayPlot, and then copied to PDF, show what appear to be fuzzy mesh lines in white areas. An example is shown below. I ...
7
votes
1answer
184 views

How do I speed up a plotting of NIntegrate when repeated multiple times inside Plot?

I am studying a set of functions (many of which I know only as a definite integral) and I have assembled into a list. Here is a sample: ...
13
votes
2answers
378 views

Export Plots to PNG in Printout Style

When creating a plot in Mathematica 10 (OS X 10.9.4 and Win 7) the FrameLabel and Ticks are greyish and only the Frame itself is black (see Screenshot bellow). Only when exporting the plot to PDF all ...
4
votes
4answers
123 views

Plot range of a 2-dimensional function as a function depending on one variable

I want to plot a function of 2 variables x and y, for discrete values of y, like: ...
2
votes
1answer
145 views

Transparency in a 3D plot

How can I make the plane in the first image more like the plane in the second? More transparent, specially. I tried messing with the Opacity and ...
2
votes
1answer
247 views

How can I plot a circular region and lines?

I am having difficulty plotting something along these lines in Mathematica. I will explain what is going on here. Basically, I am solving an interval equation $ax=b$, in the first example $a = [1, ...
-1
votes
1answer
136 views

Formatting and inserting a parameter table into a plot

I'm fitting data, and I want to put the parameter table generated by NoninearModelFit into the plot. How can I do that in a reasonable way? I want to format the ...
5
votes
1answer
200 views

Simulation Sample Paths for Stochastic Approximation Algorithm

Let $X_t$ be IID random variables in $[0,1]$ and CDF $F(\cdot)$. Suppose there exists a variable $Y_t$ given by: $Y_1 = X_1$ and $Y_t = \phi(X_t, \overline{Y}_{t-1}), \forall t >1$, where ...
0
votes
1answer
141 views
2
votes
1answer
165 views

RegionPlot3D run forever when plotting 3D ParametricRegion

when working with 2D, RegionPlot works fine with ParametricRegion as can be seen in this example: ...
2
votes
1answer
120 views

Multiple plots using dynamics

I am studying Dynamic and DynamicModule, and I have tried to make a simple plot of a family of real functions. The number of functions should be a dynamic variable controlled by a slider. So I have ...
8
votes
4answers
706 views

How many times do the two given curves intersect at the origin?

I'm reading/studying on my own a book about algebraic curves. I'm trying to find a way for Mathematica help me with the following (the book, ISBN: 038731802X, allows me to use any CAS / program. ...
1
vote
0answers
72 views

Values of an algebraic curve [duplicate]

Using tmp = ContourPlot[{y^4 + 6 x^3*y + x^8 == 0, y - x^3 == 0}, {x, -5, 5}, {y, -5, 5}] How can I get the pair values used to plot these two curves? For ...
7
votes
4answers
276 views

How can I add a tangent arrow at a certain point of a curve in a LogPlot?

How can I add an arrow at a certain point of a curve with the direction of the arrow tangential to that point? (Line are not straight in a log-plot.) ...
5
votes
1answer
237 views

Extending a ternary plot to a tetrahedron (using ListPlot)

I have been making ternary plots of data that is a list of sets of 3 numbers, where the numbers in each set sum to one (call this "DATA"). To do this, I first transform DATA onto the 2D surface with ...
2
votes
1answer
310 views

Make a scatter plot

Considering I have weather data for last 10 years for London, how can I make a scatter plot that will show the previous day's temperature as a function from today's temperature?
2
votes
1answer
239 views

Finding average error of the data

Considering I have some data, and I want to fit the data to a linear fit and find the average error from the linear fit, how can I do that using Mathematica? I have ...
2
votes
2answers
115 views

Improving the speed/efficiency of multiple (finite range) convolutions for a causal response plot

So I am looking at modelling the response of a system that is excited by multiple pulses over a period of time. The way to find the response at time t is to take the convolution between the impulse ...
0
votes
1answer
69 views

how to use Tooltip with a Dynamic point

consider this example: ...
2
votes
0answers
140 views

How do I choose only one branch of ArcTan?

I have a problem concerning ArcTan drawing a graph using ListPlot. I import a table of data: ...
0
votes
1answer
149 views

Plotting 2D color function on the plane [duplicate]

Suppose p is a some point in the plane. The function f[q] defined as ...
0
votes
0answers
54 views

How to extract data from a plot? [duplicate]

Here is the equation I want to plot, ...
0
votes
1answer
203 views

How to plot data points in the form X, Y, E(X, Y) where X and Y coordinates are not ordered?

I have got a file with field values (RF simulation of a resonator) which consists of 3 columns: X and Y cartesian coordinates ...
3
votes
3answers
335 views

Plot graphs with direction and numbered in Mathematica

I would like to write a code in Mathematica such that it shows the direction with numbers on points. I wrote this code which does not do this. I want just to complete this code with two options I ...
0
votes
2answers
427 views

Plotting a solution of the Allee Effect

I am doing a project on the Allee Effect. I am able to successfully create a stability analysis. That is, I can find the relevant equilibrium points ($y_e = 0,\ y_e = \alpha$ and $y_e=k$) and draw ...
0
votes
2answers
131 views

how do I plot this surfaces in 2-D?

Let $x_1$ and $x_2$ be two real numbers and define the column vector $\mathbf{x}=[x_1,x_2]$. Let $\mathbf{A}_1$ and $\mathbf{A}_2$ be two $2\times 2$ real symmetric matrices. Then I need to plot the ...
3
votes
2answers
280 views

Charts performance

Evaluating the following lines in my computer takes near six seconds in Mathematica 10 and near 5 in Mathematica 9. I consider this very slow as only quantiles are being calculated from data to ...
4
votes
1answer
151 views

Revolving an axisymmetric image for volumetric rendering

I have a series of axisymmetric images of a jellyfish swimming in fluid. Overlaid on these images are plots of the Lagrangian coherent structures associated with swimming, which highlight the fluid ...
5
votes
0answers
105 views

Plotting a transformed region only works with integer inputs

I can't figure out why the following code only works with integers. ...
2
votes
2answers
101 views

Fill gap created by Exclusions

A gap appears at the locations of Exclusions at t=1,t=1+t0 when the top slider for t0 is set to Play. How can these gaps be avoided or filled in? ...
3
votes
2answers
404 views

Plotting a parametric function with three input variables

I want to plot a 2D parametric function of the form: $$ f_x(\theta_1,\theta_2,\theta_3) = \cos(\theta_1)+\cos(\theta_1+\theta_2)+\cos(\theta_1+\theta_2+\theta_3) $$ $$ f_y(\theta_1,\theta_2,\theta_3) ...