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

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2
votes
2answers
256 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 ...
12
votes
3answers
557 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
98 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 $m\...
2
votes
1answer
155 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
74 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
185 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
89 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 ...
9
votes
1answer
234 views

Highlight selected points in a plot

I need to change color to selected points dynamically in my plot. ...
4
votes
2answers
265 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
159 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 <...
5
votes
1answer
368 views

How do I produce a BarLegend with the default coloring of a ContourPlot, using Legended?

I have a series of ContourPlots that I want to compare in a GraphicsRow environment. I want to add a single legend for all three ...
1
vote
1answer
137 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 ...
2
votes
2answers
393 views
1
vote
2answers
532 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
63 views

Change ColorScheme of DistributionChart

The "ColorScheme"of a DistributionChart can be changed using the ChartElementFunction like in the following example: ...
2
votes
0answers
45 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
315 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
120 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
169 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
52 views

Strange output of ColorFunction [duplicate]

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
86 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 ...
3
votes
2answers
866 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
341 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
121 views

ContourPlot color problems [closed]

I tried to use contourplot to a 2D fucntion with rescaled color, the code is given below ...
2
votes
1answer
212 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 ...
2
votes
2answers
175 views

Color points in ListPointPlot3D

I have some 3d points with coordinates and a value assigned to each point. I want to plot the points and depending on the value use a different color. I have tried to use the answer in ListPlot3D - ...
0
votes
1answer
74 views

Manually choosing colors in ListPlot

I have a ListPlot of 4 data sets (tables) and I want to manually choose what color each one has. data1 = Table1 data2 = Table2 etc. and then ...
1
vote
2answers
230 views
0
votes
2answers
99 views

How do I color an Image generated from data such that one range of values is one color gradient and the others another color gradient [closed]

I can generate a Gray scale Image from some data that I collect. However I am trying to figure out how to generate the image with two color gradients or color scales based on the value. For example ...
2
votes
2answers
91 views

Can i change AutoStyles colors for undefined variables?

I want to change from blue to red the color of the undefined variables; but only for the current Notebook
20
votes
3answers
813 views

White balance correction with Mathematica

Does Mathematica include a function to correct the white balance of an image? ImageAdjust would seem to be the first go-to choice, but I haven't found a way to ...
6
votes
3answers
249 views

mixing color of individual parts of a function in DensityPlot

I have a function which is a sum of three terms and I want to plot it in a DensityPlot. However, I would like that the ColorFunction would be the RGBColor resulting of the mixed R color corresponding ...
2
votes
1answer
168 views

Change the colors of individual atoms in a .mol or XYZ file

Similar to (Changing the atom color for plotting xyz-files), I want to take a molecule and then simply change the colors of individual atoms. I don't want to change all atoms of a type to a color (say,...
4
votes
1answer
110 views

What are all the Properties that ColorData supports?

The documentation for ColorData reads: Possible properties in ColorData["scheme","property"] include: ...
15
votes
1answer
214 views

Major slowdown when using a ColorFunction with more than one named scheme

Problem remains in 10.1 Earlier Kuba noted a major slowdown with code Simon Woods posted. Here is a simplified example. First a color function using two different named gradient schemes: ...
10
votes
6answers
314 views

Coloring an image with two Color schemes based on a Range

I would like to color an image generated from some data, using two color schemes based on two ranges of the data. This is my attempt: ...
7
votes
2answers
204 views

Color lines by angle

I would like to color some lines according to the following color function: ...
1
vote
1answer
214 views

Piecewise ColorFunction for Plot3D

I want to make a 3D plot where the ColorFunction is different depending on whether the function value is positive or negative. I know how to do the following: ...
3
votes
2answers
163 views

How do I apply a ColorDataFunction[] to a grayscale image? [duplicate]

Suppose I have a 2D array im of real values between 0 and 1, representing a grayscale image. I can turn im into an image very ...
1
vote
1answer
375 views

Adjusting contrast of a color scale with ListDensityPlot

I am using ListDensityPlot to plot data of the form {{x1,y1,z1},{x2,y2,z2}, …}. It results in the plot shown below. But I'd like to adjust the color scale contrast to better show the variations in ...
31
votes
3answers
1k views

A better “VisibleSpectrum” function?

Since ColorData["VisibleSpectrum"] is wrong, I would like to have a more accurate function to use. Can this information be extracted from Mathematica itself?
5
votes
5answers
389 views

Plot all curves in a table with a single color

I want all of my solutions in a table to be the same color. My attempt: ...
3
votes
3answers
564 views

How to create a Disk with smoothly changing coloring?

I want to have a disk. But this disk shouldn't have a fixed color; instead, I'd like it's color to fade smoothly. Until now, I came up with two ideas how to achieve this. Idea #1: ...
5
votes
2answers
384 views

How do I show only the intrinsic color of 3D polygons?

System: Mathematica 9, Windows 7. I want to assign a polygon a color in such a way that it is rendered in that color irrespective of any ambient light sources. In other words I want Yellow to be ...
1
vote
1answer
91 views

Cannot shade 3D vector in different color

I need to color each vector into different colors... but this formula just doesn't work: ...
3
votes
2answers
79 views

Coloring specific elements of sets with a prime modified order in an array plot

I have a set of sets: {{1}, {0}, {1, 1}, {0}, {1, 0, 1}, {0}, {1, 1, 1, 1}, {0}, {1, 0, 0, 0, 1}} I’m seeking to apply a color rule to only every other set, starting from the first (from left to ...
0
votes
0answers
49 views

Coloring all elements in prime ordered sets amongst a set of sets [duplicate]

So I have a set of sets. I want only those sets whose order amongst the sets plus one is prime to be colored (all the same, anything but the standard black). Any ideas? ArrayPlot[{{1}, {1, 1}, {1, 1, ...
6
votes
1answer
297 views

The default ColorFunction of DensityPlot before v10?

The default ColorFunction of Plot, Plot3D before v10 is respectively mentioned here and here,...
2
votes
2answers
112 views

How to convert a coloured image according to the colorfunction I defined?

I got an image from a website which follows the colorfunction "Rainbow", e.g. ...