Questions on the color models, schemes, named colors and color functions supported by Mathematica.

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1
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1answer
116 views

Can't get rid of vertical background color

I am trying to use GraphicsGrid, the background option is set to white, as well as for the separate graphs. But there are still grey stripes. What is the reason for ...
9
votes
2answers
164 views

Inverse of Interpreter[“Color”]: Convert a RGBColor to a natural language color name

What is the best way to create the inverse function of Interpreter["Color"]? That function takes a natural language color name like ...
5
votes
2answers
126 views

Modifying the built in graphic format of colors

Can users modify the default format of colors in the front end? Red For example, dimensions, aspect ratio, EdgeForm? The motivation is the functional ...
1
vote
1answer
88 views

Adding a fading color only to 3D curves going outside a cylinder

I'm having a problem with color shades on multi curves drawn with the Mathematica 7.0 code below. All the curves with both their endpoints inside the unit cylinder (green circle on the picture below) ...
1
vote
1answer
95 views

Adding a fading color to multiple lines in 3D

I would like to add a fading color to all the 3D lines I'm drawing with the code below, but I'm having difficulties with implementing the idea. The curves are starting on a unit sphere, and extend in ...
0
votes
1answer
86 views

Colors on a 3D curve not working

I'm having troubles applying colors to a simple 3D curve plot. Here's the code : ...
2
votes
1answer
87 views

ColorReplace does not work

I want to do - seemingly - simply image processing. I want to replace all blue pixels with white pixels. The obvious command would be: ...
3
votes
1answer
45 views

Change Property without re-evaluating [duplicate]

I am working with ContourPlot3D, and my expression takes a long time to evaluate (nearly 20 minutes). So I am wondering if there is a method to changing format ...
0
votes
1answer
70 views
3
votes
2answers
98 views

Coloring network edges by weight using GraphPlot

Following up on a previous question about how to color the nodes (vertices) of a network (graph) according to a color scaling of a property of those nodes, I'm now asking basically the same thing ...
5
votes
1answer
328 views

How to fill curves with a color gradient?

I would like to produce a graphic like this but with a continous color gradient between the outer curves. Is it possible to achieve this by using the Filling ...
6
votes
2answers
109 views

RGBColor, ColorSlider and ColorSetter

A single RGBColor expression displays as a little square, showing the color. I just found that this little square is both a tooltip and a button. It seems to be new ...
4
votes
2answers
127 views

ColorFunction uses graphics coordinates instead of Plot3D coordinates

I've had the same effect in Mathematica 9 and 10. I'm trying to color a 3D Plot with another function, let's call it colorFun ( it should highlight the areas where the colorFun is above a certain ...
14
votes
3answers
2k views

How to sort colors properly?

I can't seem to be able to sort colors by their hue and perceptual brightness correctly. Here's my current solution, but it's not right; there are all these dark bands: ...
4
votes
3answers
182 views

How to produce a matrix plot from 3 matrices a, b and c following RGBColor[a[[i,j]],b[[i,j]],c[[i,j]]]?

I am trying to produce a single-plot from 3 matrices, let's say: ...
16
votes
1answer
513 views

Is ColorDistance symmetric?

Is the function ColorDistance symmetric, i.e. is it always true that ColorDistance[a,b] == ColorDistance[b,a], as use of the ...
3
votes
2answers
103 views

Permanently Changing Default Color

I can't find this answer elsewhere, but is there a way to permanently change the default plot color? In 10 the default plots are orangish and in 9 they were a purple-bluish color. Is there a way to ...
3
votes
2answers
189 views

Matrix Plot: How to Apply color function to only a region of the plot

I want to make a matrix plot where a color function is applied to a region of a matrix. Those matrix elements which were not in the region specified should not have any color associated with them, and ...
3
votes
1answer
82 views

Duotone plots with cyan and black

What's the typical way to make Mathematica plots use purely cyan and black? Maybe there's a fairly standard method, since publishers often require this? It also seems like some plot types take ...
21
votes
3answers
844 views

How to plot an emission spectrum?

If I have a list of data with various wavelengths in nanometers, how would I plot them on a graph so it looks like this: So far I have managed to plot a spectrum in ...
2
votes
1answer
82 views

Show scatter plot of change in image saturation

Let's say I have two images. One is the original and the other is after some photo-manipulation has been applied to it. I want to show the effect on the color saturation using a scatter chart. ...
2
votes
1answer
94 views

Change cell frame color in stylesheet

I am trying to make a custom stylesheet, but I am not able to get rid of the cell frame color from the base stylesheet. In particular, I have: I have changed the background color of the cell to ...
5
votes
1answer
109 views

BarChart3D: varying individual bar color

I've been working with a chart like so: ...
50
votes
3answers
2k views

Python-style plots in Mathematica

I love making plots in Mathematica. And I love to spend a lot of time making high-quality plots that maximize readability and aesthetics. For most cases, Mathematica can make very beautiful images, ...
6
votes
1answer
83 views

Graph: Coloring Edges individually

CODE: Graph[{Style[0 -> 1, Red], Style[0 -> 1, {Blue, Dashed}]}] This mathematica code will make both lines solid Red, since they belong to the same two ...
5
votes
1answer
101 views

Continuous background color of adjacent cells

I'm trying to make continuous blocks of cells so that their background colors are the same, but without breaks of white space between them. E.g. After some recent digging, I found the option "Show ...
2
votes
2answers
223 views

Gradient in a plotstyle

I'm trying to replicate the figure below. Now a nice first approach to do this is by using Mathematica, by making some kind of contourplot with circles and just add a gradient to the contourstyle. Now ...
11
votes
3answers
516 views

How to speed up Colorize

I have a list of about 500 images similar to the following: A = Import["http://i.stack.imgur.com/1bV4O.png"] ...
2
votes
0answers
88 views

ImageData to Image to ImageData, in LABColor [closed]

Given an $m\times n$ image $G1$, I'm trying to: Extract the $mn$ pixels of $G1$ as an $n\times m$ matrix $M1$ of triples, where each triple represents the color in LAB space. Turn $M1$ into an ...
2
votes
1answer
137 views

Coloring points via “TemperatureMap” [duplicate]

I have a collection of 3D points, and each is associated with a real number in [0,1]. A typical element looks like {{x,y,z},c} where ...
0
votes
1answer
64 views

Adding circles on a function plot depending on the slope

I have the following function and I use manipulate to change the plot of the function and the integral respectively. In nonlinear dynamics one plots a little circle/point on the intersections of the ...
-3
votes
2answers
146 views

Vary the color of a 2D scatter plot [duplicate]

This is what I want. I want to change the colors as I progress through a list.
2
votes
2answers
84 views

Export Text with Colors

Is there a way of using Export[] method to take a text with colors (using Style) and then export to file, such that when I open ...
8
votes
1answer
191 views

Highlight selected points in a plot

I need to change color to selected points dynamically in my plot. ...
4
votes
2answers
215 views

Overlapping Spheres with a Shared Blank Region

We have two similar overlapped spheres in a way that the distance between their centers is smaller than the sum of their radius (2R>a). As I show here: Also, we want to draw them in a such way that ...
4
votes
2answers
149 views

Gridding in a Nested Matrix

We have a nested matrix as: nested={{he, {{e, f, g, h}, {s, 0, q, i}, {s, 0, q, j}}}, {ho, {{e, f, g, h}, {0, u, t, i}, {u, t, 0, j}}}} and with the line ...
1
vote
1answer
89 views

DensityPlot colours symmetric around zero

I have some function of two variables (which happens to be the error in some approximation I'm interested in). I'd like to get a density plot of the function, such that in regions when the function is ...
1
vote
1answer
313 views
1
vote
2answers
282 views

Controlling colors of points in ListPlot

I have a collection of points I want to plot using ListPlot[]. I would like each individual point to be a certain color depending on a key value that is based on a list separate from the points. As a ...
2
votes
1answer
55 views

Change ColorScheme of DistributionChart

The "ColorScheme"of a DistributionChart can be changed using the ChartElementFunction like in the following example: ...
2
votes
0answers
39 views

Calculating number of discernible colors in CIE La*b* space

How can Lab space be easily splitted into unity cubes and determined number of cubes that colours of certain image occupy?
12
votes
3answers
290 views

Is there any faster implementation of DominantColors?

The function DominantColors is a simple function but runs incredibly slow when the number n of dominant colors to find is large - it is currently the biggest bottleneck in my code: ...
0
votes
2answers
83 views

How to Fill ContourPlot

Given a contour plot such as function = Cos[c] + Cos[a] pltc = ContourPlot[function == 1/2, {a, 0, 4 Pi}, {c, 0, 4 Pi}]; How can I color the regions in which ...
2
votes
2answers
148 views

Make a colored ListPlot

Basically I have a set of 3D points, such as {3,4,3} or {4,1,4}. Instead of plotting the points in a 3D space, I want to plot the x,y coordinates of the points on the 2D plane and use the z coordinate ...
0
votes
1answer
45 views

Strange output of ColorFunction

In v10.0.2, compare the following two outputs: Plot3D[x^2 + y^2, {x, -2, 2}, {y, -2, 2}, ColorFunction -> (Hue[Sqrt[#1^2 + #2^2]] &)] ...
0
votes
1answer
72 views

Coloring circles based on radius

I have a list of ellipses with x and centroid, orientation, and major diameter and minor diameter. I currently have them overlaid on an image in red but what I would like is to be able to colour them ...
2
votes
2answers
825 views

How do I find the average color of an image?

It sounds so simple to do, but the best solution I've found so far is by using the MeanFilter function, which isn't really feasible on large images. Can anyone help ...
1
vote
2answers
226 views

Using Specularity effects and ColorFunction in Plot3d

I'd like to reproduce the 3d surface of the attached image . What I'm interested in, is the light reflection at the basis of the surface and the rainbowlike color. I use Plot3d and colorfunction in ...
0
votes
1answer
90 views

ContourPlot color problems

I tried to use contourplot to a 2D fucntion with rescaled color, the code is given below ...
2
votes
1answer
170 views

Polar color coding for complex function plots?

Having browsed this Q on plotting complex functions and the Zeta page, I don't see anything as nice as this plot from Matilde Marcolli's slides "Geometry and physics of numbers". Looks like ...