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

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3
votes
4answers
83 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 colorschemes based on two ranges of the data. This is my attempt. ...
0
votes
0answers
13 views

How to converrt RGB to YCbCr [duplicate]

While converting rgb to Ycbcr, do we get values as floating point numbers? I would like to have Y, Cb, Cr values as integers. Is it possible?
6
votes
2answers
134 views

Color lines by angle

I would like to color some lines according to the following color function: ...
1
vote
1answer
55 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
54 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
69 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 ...
16
votes
2answers
388 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?
3
votes
3answers
344 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: ...
3
votes
2answers
286 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 ...
2
votes
2answers
41 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
38 views

Coloring all elements in prime ordered sets amongst a set of sets

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, ...
3
votes
1answer
78 views

The default ColorFunction of DensityPlot before v10?

The default ColorFunction of Plot, Plot3D before v10 is respectively mentioned here and ...
2
votes
2answers
63 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. ...
1
vote
2answers
78 views

Adding colors to objects in a loop

I'm just starting out in Mathematica and still learning the ropes. I'm making a "necklace" which is a circle with squares around it. The following works: ...
3
votes
1answer
125 views

How can I combine two color schemes for plotting?

I want to use ListContourPlot to display all negative values using one colorscheme and all positive values using another color scheme. This question Define a color function using Piecewise gives some ...
3
votes
2answers
484 views

Color a Function by its Derivative

Mathematica's ColorFunction seems to struggle with coloring a function "y" by its derivative D[y,x]. This is a seemingly simple task, but Mathematica can't handle it. While I can certainly evaluate ...
1
vote
1answer
101 views

How to apply two kinds of Plot styles in single graph

My version is 9.0 I want to apply ColorData and Line Width styles at the same time, like the ColorTheme Function new in 10.0, but there is always errors. Codes under here: ...
1
vote
1answer
146 views

Plot multiple solutions of a system of differential equations with different values of constant c by using NDsolve

I am traying to solve system of differential equations with different values of constant c then plot the solution with different values of the constant c. where c= 2.2758, 2.04822, 1.82064, 1.59306, ...
2
votes
0answers
40 views

Background color does not display in InputField unless Appearance option is also specified

I get the same behavior for v.10.0.2 and v.9 with OS X (10.9.5) : No background color is displayed in InputField if I just set properly the option. For example, ...
2
votes
0answers
90 views

How can I transfer colors from first image into second image? [duplicate]

How can I transfer colors from first image into second image, where every object from the first image should take the same object's color from first image. This images are only an example. this is ...
3
votes
4answers
142 views

ReplaceImageValue and ReplacePixelValue extremely slow

I have a grey scale image: and I am doing the following: bin = Binarize[image, 0.18] ...
3
votes
2answers
67 views

BarLegend using Function that uses Blend

I'm sorry if this is a duplicate, but I don't even know how to look for it. I had this line of code that worked on a Notebook I wrote on Mathematica 9.0: ...
3
votes
1answer
140 views

How can I pick a color from a ColorMap and colorize selected image pixels with this color

I have a binarized image and would like to set pixel values which are 1 to a certain (any) color picked from ColorData["TemperatureMap"] and 0 to another color of TemperatureMap. How can I do that? ...
11
votes
2answers
302 views

Modify existing color scheme

I am using the "TemperatureMap" color scheme for image processing. How can I set the lowest color value to Black? Generally ...
1
vote
2answers
121 views

Colorizing thresholded images with different colors

I am switching from IDL (from exelis) to Mathematica and want to do the following: thersholding a image (all values above a certain threshold are set 1, the rest is 0 ) colorizing the thresholded ...
2
votes
2answers
108 views

ListPlot a bunch of points that changes colour

I have a list of points: r = Range[-Pi/2, Pi/2, Pi/8]; angles = (c = Tuples[r, 2]) and a list of numbers which will determine the colour of the points above: ...
4
votes
2answers
126 views

Match colors to plot themes

How do I get the colors to match the plot theme when I use a PlotLegend that is separate to the plots? I have had a look at How to access new colour schemes in version 10? but can't seem to find what ...
2
votes
1answer
55 views

Inconsistent behavior in ColorFunctionScaling of BarLegend in v10.0.1

I find the ColorFunction in BarLegend behaves very weirdly: Force rescaling from 0 to 1 For example: ...
3
votes
1answer
73 views

RegionPlot with ColorFunction gives ugly frame labels

I was working on a simple 2D region plot: ...
1
vote
1answer
95 views

Plot multiple solutions [duplicate]

I want to plot multiple solutions of an equation, so that one can differ them in the plot. The given equation is e.g. ...
0
votes
1answer
70 views

ColorFunction that depends on angle of line

I have a ListLinePlot, and I want the ColorFunction to vary as the angle, so that the color of the whole line depends on its angle from the x-axis. Here is a MWE of what I am doing: ...
2
votes
2answers
61 views

Default color for Filling in Mathematica 9

The default color scheme for plots in my Mathematica version is ColorData[1]. What about for the Filling option?
0
votes
0answers
20 views

Different color for plots inside manipulate object [duplicate]

I want to plot two functions in the same plot (meand and approxmean) with a different color. When I place the plot commands outside of the manipulate and grid region they are colored differently but ...
0
votes
1answer
64 views

Preventing Colors of Graphics from Blending

I am displaying multiple Disks that overlap and many of the Disks are different colors. Currently, the regions in which the Disks overlap are a color that is a mixture of the two Disks. I would like ...
3
votes
3answers
154 views

How to shade a plotted region in specific direction?

I am using RegionPlot to plot a linear program maximize 30x1+25x2 with the constraints ...
3
votes
0answers
49 views

How to replicate v9's color conversion to LAB under v10

Mathematica 10(.0.0) appears to use a different flavor of the LAB color space, but I would like to emulate the same behavior observed in version 9(.0.0). v9 ...
24
votes
3answers
758 views

Is there an easy way to use Matteo Niccoli's perceptual color maps for 2D plots in Mathematica?

I have been using the ubiquitous Jet color palette for 2D plots for some time now, and don't really care for it. Then I came across the series of blog posts, The rainbow is dead...long live the ...
1
vote
0answers
79 views

ColorFunction - custom colors and scaling

I am trying to implement my own colors and scaling into the ColorFunction which I use in ListDensityPlot. I have several lists of 2D values which I plot in multiple images and I want to scale the data ...
1
vote
1answer
110 views

Filling between ParametricPlot and Plot

There are some similar questions: (1) (2) have been ask, but I think this is a different one. If we have a ParametricPlot and a ...
0
votes
2answers
79 views

Change the colour scheme in DensityPlots to make the zero white

We are trying to plot a density plot using the TemperetarueMap colour scheme. However, we don't seem to be able to make the white colour correspond to the value zero of the function we are plotting. ...
4
votes
2answers
413 views

Colorize Grayscale Image

I have a grayscale image that contains two objects. The grayscale pixel values can be divided into three intervals where two of them represent objects and the third represents the background. The ...
3
votes
1answer
87 views

Draw function with different colors associated to a parameter

I want to generate a plot similar to this one, which allows for different colors when given different parameters : (This is the Moreau-Yosida regularization of the absolute value) the Moreau-Yosida ...
3
votes
1answer
111 views

Recognizing Matching Colors in a Game Grid from a Camera Image

I am relatively new to Mathematica, having taken my first serious dive into it this week. As a fun project to teach myself some of the basics, I've come up with a goal of optimally solving a game ...
4
votes
1answer
80 views

Can't Get BarChart to use ColorFunction

I'm trying to get a BarChart to colour negative valued bars red and positive valued bars green but I'm having a time trying to do it. My latest attempt is: ...
2
votes
3answers
303 views

Coloring random points in an annulus

I have found the following random generator to generate points in an annulus in stackoverflow on stackoverflow ...
0
votes
1answer
99 views

Explanation for coloring of variables by code editor?

I was working on some homework just now, and I realized that some of my variables have different colors, and I am not sure why. In the example below f is black, ...
0
votes
0answers
22 views

ColorFunctionScaling [duplicate]

I am using ColorFunctionScaling in my plot but I don't want it to automatically make the min 0 and max 1. I want it to follow a fixed scale depending on height(or ...
1
vote
2answers
64 views

Is there a way to logically test an optional color input inside a module? [duplicate]

Suppose I create a Module that is expected to return a graphic that I will later use in a plotting procedure (e.g., with ...
1
vote
0answers
66 views

Individual ColorFunction with RGBColor

I want to create a special ColorFunction with RGBColor for my DensityPlot. A nice example is ...
6
votes
2answers
263 views

How to use Mathematica to turn a picture into low poly style?

I want to use Mathematica to turn a picture into low poly style. That is, to make the following conversion: Bill to Bill low poly(Using Image Triangulator App). I think the biggest difficulty is how ...