Questions on the construction of 2D and 3D graphics through the direct use of primitives, directives, and functions. Include the graphics3d tag for questions specifically on 3D graphics. This tag is not to be used for basic questions on visualizing functions and lists using the various flavors of ...

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13
votes
4answers
3k views

How do I draw a DensityPlot in polar coordinates?

I am trying to plot $J_m(\chi_{mn} r) \cos(m\phi),$ where $J_m(\chi_{mn}) =0,$ as a DensityPlot in polar coordinates (solution to 2D wave equation in polar ...
13
votes
6answers
672 views

How can I fill-in this Pentagram?

This is my code: Graphics[{EdgeForm[Yellow], Yellow, Polygon[Table[{Cos[t], Sin[t]}, {t, 0, 4 π, (4 π)/5}]]}] which gives this: but I want to get: How?
13
votes
4answers
653 views

Is it Possible to change dashes into circles with Plot command?

Is it possible to change the Dashed Style of a curve into circles with Plot command ? ...
13
votes
4answers
411 views

How to separate paths from the output of EdgeDetect?

I have been trying to find a way to separate the various closed paths that can be output by EdgeDetect. For example, taking the output of: ...
13
votes
3answers
2k views

Finding a Concave Hull

I have a 3d clustered data: Is there any other way to get concavehull of 3D data points?
13
votes
4answers
2k views

How can I extract the maximum value from a Histogram?

In Mathematica 8.04 I've created a histogram of returns on a stock using: ...
13
votes
2answers
430 views

Anti-aliasing with the multiple-object form of Polygon?

Observe: rand = RandomReal[1, {4, 3, 2}]; Graphics @ Polygon @ rand Graphics[Polygon /@ rand] I am losing ...
13
votes
2answers
594 views

Phase portrait on a cylinder

It is very nice and very easy to make a sketch of a phase portrait with StreamPlot. For example, for the classical pendulum, defined by $$ \dot x=y,\\ \dot y=-\sin x, $$ The code ...
13
votes
4answers
600 views

Is it possible to select outliers on a graph and determine the index of the outliers?

I have a large data set of experimental data for which I have determined a theoretical fit. However, for some of the experimental data I took, there was systematic error, leading to the data deviating ...
13
votes
2answers
991 views

Rebuild a polygon so it doesn't self intersect [duplicate]

If you consider the following Polygon: ...
13
votes
2answers
595 views

How to create custom Graphics primitive?

How to create custom Graphics primitive? It should have the following properties, resembling properties of built-in geometric figures, like ...
13
votes
3answers
2k views

Clustered and Grouped Bar Chart in Mathematica v8.0

How would I create a clustered and grouped bar chart that looks like this (which was painstakingly created using Excel)? I have seen examples for Mathematica v6.0 but none for Mathematica v8.0. The ...
13
votes
1answer
599 views

Graph stories, 3-d volumes

I saw a lesson plan that had students filling different shaped bottles at a constant rate. The idea was to graph height vs. time to show the students how different shapes would produce different ...
13
votes
1answer
428 views

Mathematica: 3D plot based on combined 2D graphs

I have several sigmoidal fits to 3 different datasets, with mean fit predictions plus the 95% confidence limits (not symmetrical around the mean) and the actual data. I would now like to show these ...
13
votes
3answers
960 views

How to get 2D graphics into 3D without background?

Consider the following code: ...
13
votes
2answers
1k views

Computing the bounding boxes for Text objects

Regardless of AspectRatio, the Text boxes overlap. ...
13
votes
2answers
363 views

Get Coordinates 4 significant digits limitation

The tool "get coordinates" (clicking on a plot), seems to work with a fixed number of significant digits (4), in a way that we can quickly lose sensibility (the tool really becomes useless). The ...
13
votes
3answers
1k views

Font sizes in graphics

I'm trying to find an explanation for the different sizes I'm seeing for fonts added to graphics in different ways, and haven't yet located an easy to understand explanation. Here's a minimal ...
13
votes
1answer
646 views

Map of Specific US States? (Isolated)

My question here is fairly basic, and I'm sure I'm overlooking something basic. I know about CountryData for creating shapes of entire countries, and it works, to ...
13
votes
2answers
553 views

Diagonal Tick Marks

I would like to draw diagonal tick marks around a plot, and simultaneously rotate the tick labels as well. I've mocked up what this would look like: Is there an easy way to do this in Mathematica? ...
13
votes
1answer
444 views

Morphological Filtering in 3D to produce skeletons

Context As a follow up of this question and that answer, I would like to identify the special lines separating 3D watersheds. These are useful in the context of astronomy to identify the ...
13
votes
1answer
300 views

How to determine numeric equivalent of Tiny, Small, etc. image sizes for Graphics?

Is there a way to find the numeric equivalents of Tiny, Small, Medium, and ...
13
votes
1answer
133 views

How to retrieve current FaceForm?

The current colour in a Graphics object can be retrieved using CurrentValue["Color"] for use in Dynamic stuff. Example: ...
13
votes
2answers
1k views

How do I map a Mollweide projection onto a sphere?

I have this Mollweide projection of the Earth circa 600 million years ago (http://jan.ucc.nau.edu/~rcb7/370moll.jpg).(1) I want to map this onto a sphere. My results have big black splotches in ...
13
votes
1answer
440 views

Cropping a Voronoi diagram

Someone know how can I get the correct crop of this Voronoi image using RegionFunction? As you can see, there is a lot of undesired white regions inside the left ...
12
votes
5answers
742 views

How to combine one or more rotated graphics objects?

I wish to produce an image with more than one composite graphics objects which have been modified using Rotate. I feel this should not be difficult, but haven't yet found a solution. A simple example ...
12
votes
4answers
4k views

Graphics plot of point using unfilled circle

I'd like to be able to place points on a plot using Graphics[{Point[{a,b}],....}] but have the plot symbol be an unfilled circle. I've looked around but can't find ...
12
votes
5answers
480 views

Joining ordered set of points with splines in spiral

I have a collection of points ...
12
votes
4answers
566 views

Using an Image as the Fill/Texture (not background) of a Plot (not polygon)

Is it possible to use an image, rather than a color, or ColorFunction, as the filling for a plot? For instance, I want to make a plot using ...
12
votes
3answers
2k views

Creating a Sierpinski gasket with the missing triangles filled in

I'm creating some questions for my math classes. The one below refers to the Sierpinski gasket. I found some great demonstrations to create the gasket. So that's good. Solving the problem is ...
12
votes
4answers
355 views

Arranging connector lines

Heike gave an absolutely wonderful answer to my question about arranging subplots around a main plot and including connector lines. This is the result: Starting from Heike's answer, what is the ...
12
votes
3answers
4k views

How to express ticks in scientific form? [duplicate]

I want to express the ticks in scientific form. I tried two ways as following ...
12
votes
3answers
543 views

WaveletScalogram in polar coordinates

For given dataset data = Re[Zeta[1/2 + I Range[0, 100, 0.01]]]; It is nice that Mathematica can plot data in both Cartesian and Polar coordinates. ...
12
votes
5answers
1k views

How to texturize a Disk/Circle/Rectangle?

The documentation for Texture states that "other filled objects" can be texturized: Texture[obj] is a graphics directive ...
12
votes
2answers
264 views

ShearingTransform and Dynamic

Background: I have a geometric transformation composed of a RotationTransform, ScalingTransform and ...
12
votes
4answers
460 views

Quirk in VertexColors interpolation when displaying Polygon

When using VertexColors, the docs state: The interior of the polygon is colored by interpolating between the colors specified by ...
12
votes
2answers
271 views

Why does DominantColors keep shuffling the order of the results?

This graphic is produced by running DominantColors (new in Mathematica 9) with different values, using the Lena image as the source: Each row is a list of the ...
12
votes
2answers
599 views

Proper Filling of Self-Intersecting Polygon

I have a spiral pattern that I would like to fill, which self-intersects. My desired behavior is to have filling between neighboring lines only, and to represent this figure as a single polygon. The ...
12
votes
3answers
1k views

Adapt ticks in plot and font in legend

Some of my 2-dimensional data are displayed with a code similar to this: ...
12
votes
2answers
1k views

How to get and set default font parameters for Plot, ListPlot, LogPlot, etc.?

How can I find the default font parameters (family, size, etc.) for the text that appears in Graphics produced by Plot, ...
12
votes
2answers
1k views

Failure to export graphics by right-click when Notebook magnification is changed

Bug introduced in 9.0.1 or earlier and persisting through 10.1.0 or later When I try to export graphics as PNG, JPG and other rasterized formats using the right-click and choosing ...
12
votes
1answer
2k views

3D plots with parallel projection

It is easy to make 3D Plots with Mathematica, e.g. use: Plot3D[Sin[x+y^2],{x,-3,3},{y,-2,2}] But I want to have nice plots in my thesis, so I decided to use ...
12
votes
2answers
322 views

Interpolation on a regular square grid spanning a triangular domain

Context I am trying to identify contours of a function which is sampled on a cartesian grid within an irregular (triangular) region. Here is the data ...
12
votes
1answer
284 views

How can we show the boundary of a WordCloud shape?

WordCloud can arrange the words inside a shape. ...
12
votes
1answer
2k views

How do I flatten transparency on a graphics, for conversion to eps or similar?

I've got a graphic that I'd like to save as an eps file. Trouble is, the graphic has some transparency to it. Since the eps format doesn't handle transparency, I want to flatten the transparency out, ...
12
votes
1answer
637 views

PieChart with radial coloring/color function

I am trying to visually compare multiple functions that depend on a single argument running from $0$ to $1$. They describe a radial property and so I thought it would be nice to use a kind of ...
12
votes
1answer
459 views

Generating a topological space diagram for an n-element set

Over on StackOverflow I asked a similar question for the n=3 case, but the answer given doesn't easily generalize. How can I make a diagram such as this: But for a general n-element space ...
12
votes
1answer
214 views

Raster to Image conversion problem

Bug persisting through v.10.2.0 There are 3 ways to convert a Raster into an Image : only 1 works for me with version 10.0.1,10.0.2,10.1.0 , and 2 work with ...
12
votes
1answer
248 views

Effects of single-point and multi-point calls of Point on plot range

Several Graphics primitives are listable. For instance, Point accepts lists of coordinates so that multiple calls to Point are ...
12
votes
1answer
216 views

Weird behaviour when using Scale, Rotate in Graphics

Bug persisting through 10.2.0 (Edited to simplify drawing) I have a drawing of two tangent circles: ...