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

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3
votes
3answers
250 views

How to paint part of DateListPlot?

My graph is about fires (burned area) over 12 years presented in one Date List Log Plot. Because most of fires are in summer (as expected) I would like to highlight that with different background ...
3
votes
3answers
561 views

Comparing 2 Data Sets in a Single Plot

I have 2 data sets, data1 and data2 with large (in the thousands) amounts of data and I want to compare them in a plane. They ...
3
votes
2answers
278 views

Plotting two functions with dependent input function

I have defined a function: myJ2[n_] := 1/n* Total[RandomVariate[NormalDistribution[0, 1], n]^2] This is basically an approximation to the gaussian integral. I ...
3
votes
2answers
406 views

HSB -> HSL Converter

Starting from an image I would like to apply a custom filter to an image. I have thought and implemented this filter in HSL space and it goes like this : Boost the saturation of the pixels that ...
3
votes
2answers
931 views

How to assign different colors to list plotted in ParametricPlot? [duplicate]

Possible Duplicate: Difference in Plot when using Evaluate vs when not using Evaluate I am plotting galaxies and I would like to color them according to their redshift values using a ...
3
votes
1answer
295 views

Creating multicolored meshed plots (connected scatter plots) using ListPlot

I would like to make colored scatter plots where the dots are connected by lines. I have tried the following, using Joined->True to connect the dots and ...
3
votes
3answers
199 views

Colorize a 3D distribution of points according to density

Suppose we have some random 3D distribution of points. I'll use the spherical ball defined below as an example and a starting point for the discussion here : ...
3
votes
2answers
190 views

How can I detect and modify one area of an image while preserving the rest

I have an image with a big black disk bounded by a white boundary in its center. The image contains some other stuff outside of the spot and its boundary. This stuff has colors which include both ...
3
votes
2answers
147 views

Contour coloring and (List)ContourPlot projection

I have two questions concerning (List)ContourPlots. Since they are related to a single visualization desire, I have combined the questions into a single post. I'm hoping that they will be easy to ...
3
votes
1answer
114 views

Plotting with ColorFunction -> GrayLevel - no black

This is probably a fairly trivial question, yet I have been unable to find an answer - help would be much appreciated! :) I am trying to plot a 28 x 28 matrix (tabulated data given here), containing ...
3
votes
1answer
198 views

ContourPlot or DensityPlot ColorFunction with x, y and z arguments

Is it possible to apply a color function to ContourPlot or DensityPlot that is function of x, y and z, and not simply of z? Example: ...
3
votes
1answer
113 views

Frontend coloring of Table[x, {x, 0, x}]

I have a small question about how the Mathematica frontend colours in the variables that appear in (wrongly written) iterators. More specifically, I'm intrigued by the colour of the third ...
3
votes
1answer
79 views

How to color a BSplineSurface

I am trying to color a BSplineSurface in a complex way but not having any luck using ColorFunction. I can use ...
3
votes
3answers
131 views

Center Diverging color map on a matrix plot

I want to use the color function "RedBlueTones" and I want to center the map at a number. Then I want to blend in the red direction of I am greater than that number and blend in the blue direction if ...
3
votes
2answers
240 views

Color of a plane in Contourplot3D

I have the following code example: ...
3
votes
3answers
219 views

Using a complicated function as color function

I have an ellipsoid with parametric equations lst = {10*Cos[u]*Sin[v], 3*Sin[u]*Sin[v], 2*Cos[v]}; I define a function ...
3
votes
1answer
110 views

How can I change label colors in a colored chart?

I am trying to make a chart with labels, but I would like for the labels on the chart to be white for purposes of visibility. I am aware of the ...
3
votes
1answer
69 views

ArrayPlot of square matrix: how does ColorFunction -> Automatic work?

Suppose you have the following: tt = Table[{i, j}, {i, 0, 10}, {j, 0, 10}] The table tt is a matrix of pairs, ...
2
votes
2answers
298 views

Coloring a shape according to a function

I would like to create a $2D$ shape, say an ellipse, where each point in the ellipse is colored according a RGB function, so at point ...
2
votes
4answers
580 views

Hue shade colours

Looking at the plot below, how can I know what colours made the Hue shade? ...
2
votes
3answers
529 views

Color mixing or blend

Color mixing seems not only one type. Here is RGB_color_model I wrote this one: ...
2
votes
2answers
582 views

How can I invert the colors in a color bar

I have this Mathematica code ...
2
votes
2answers
183 views

Colors for multiple piecewise functions

I have the following $3$ piecewise functions, and I would like that f1, f2 and f3 have $3$ ...
2
votes
1answer
157 views

How can I mix colors?

As far as I know if you combine Blue and Green the result is Cyan (using additive mixing). ...
2
votes
3answers
506 views

Controlling Bar Color in BarChart precisely [duplicate]

I'm trying to control the color of individual bars in a BarChartwhen I pass a 2 dimensional list of data to plot. What I want to accomplish is that for each pair of ...
2
votes
2answers
143 views

DensityPlot Increase Information

I am trying to make a density plot in Mathematica, however the distribution of the plot is not as visible as I would like. I plotted the same function in python and it contains a greater visible range ...
2
votes
1answer
173 views

How can I create a colour image using raw black and white data? (FITS data cube)

I have a data cube containing pictures of a galaxy across a thousand wavelengths. I want to take the data for the image slides in the red and blue parts of the spectrum, and have them represented in ...
2
votes
2answers
142 views

ListDensityPlot controlling the number of colors

Is there a way to set the number of colors used in ListDensityPlot. I am using "Rainbow" as follows: ...
2
votes
1answer
171 views

Why is the test in my ColorFunction not behaving as expected?

In my code I have a ColorFunction that is meant to highlight all values of $f(x)$ that are greater than $x$ ...
2
votes
1answer
119 views

Buttons Which Change Color, Each Time Pressed [closed]

I need to have 100 buttons, which their color is defined by the parity of number of times they are pressed: If they're pressed an even number of times their color is blue, and otherwise red. I don't ...
2
votes
1answer
140 views

How to make custom discrete color data function

Attempting to make custom discrete color data function: my custom color: is it possible to use my custom color ...
2
votes
2answers
286 views

ColorFunction based on data

I have a list of numbers, and I would like to plot them using ArrayPlot (which is easy, usually :)). I would like to be able to color the elements of the plot based on the average of the list: one ...
2
votes
2answers
458 views

Spreading colors in ListContourPlot

I have a data file with triplets. The first two numbers indicate the x and y position, while the third one is the log10 value of a particular indicator. I want to create a 2D plot in which the ...
2
votes
1answer
44 views

Having variables appear aqua in user defined function [duplicate]

In many of the inbuilt mathematica function, variables appear aqua like in: However, when creating your own function, variables no longer have that green coloring and are instead colored like an ...
2
votes
1answer
64 views

Coloring a set of polygons, each polygon to have a specific color

In addition to my previus post, regarding plotting the surface of a Möbius strip, I now realised, that some of the eigenmodes for a Möbius strip are either oscillations of a scalar field OR a vector ...
2
votes
1answer
93 views

Giving a custom style a colored gradient background

In Mathematica, customizing Sections, Subsections, Titles and so on, can be done with Format > Style > .... Changing the background color of a style is one of the things you can do. Here is an example ...
2
votes
1answer
235 views

Normalize the PlotLegends and z values for two DensityPlot

I'm trying to compare two DensityPlots: ...
2
votes
1answer
390 views

How to colorize a rectangle with a given color function?

I want to set color to a rectangle (in fact a line) that lies on (0,0) and (1,0), and the color function is given by $u(x,t)=t(x-x^2), 0\leq t\leq1$. Since, this $u(x,t)$ act as temperature at the ...
2
votes
2answers
117 views

I want to change the outer background color of a manipulated plot

I downloaded some demonstrations' sources (for example) and I want to change their colors. I am only stuck with the white outer background that is around the plot's yellow background. I would like to ...
2
votes
1answer
215 views

Color coding based on 4D data within a building

I am trying to create something similar to a Heatmap within a building. Suppose I have a room with dimensions, {30,40,50} as length, width, and height respectively. I have a set of data that is of ...
2
votes
1answer
92 views

Can I apply a ColorFunction to FaceGrids, or otherwise have FaceGrids with varying color?

I want to make a 3d plot with FaceGrids with a certain color scheme. Specifically, I'd like them to be one color below a diagonal line, and a different color above ...
2
votes
0answers
121 views

CMYK colour using Drawing Tools

I'd like to use the Drawing Tools palette to draw objects in CMYK colour. The only way I seem able to change the colours of these objects is to use the window shown below. Edit Is there a way to ...
1
vote
2answers
214 views

How to blend some colors on a curve

I need to define a color gradient on a 3D curve, but I'm having some problems with this. Suppose we have a 3D curve defined as a parametric function of some real variable ...
1
vote
2answers
162 views

Image's pixels GPU colour classes splitting

How can I split in color classes, the pixels of an image that I load in Mathematica? I would an output like this: ...
1
vote
2answers
127 views

Show Simplified Directives [closed]

Is there a way to force Mathematica to convert an already rendered Graphic to the simplified Directive form of that Graphic. Background: I am currently editing Graphics using Drawing Tools and then ...
1
vote
1answer
70 views

Two discrete colors for surface with ParametricPlot3D

I am trying to create a plot of a surface that is yellow above the xy-plane (z>0), but blue below (z<0). My first attempt was to use ...
1
vote
2answers
108 views

How can I remove edges from my DiscretePlot?

By default, DiscretePlot displays "edges" along the sides and, prominently, align the top when ExtentSize -> Full is set. For ...
1
vote
2answers
209 views

Multiple curves plotted with different colours [duplicate]

I am trying to use ColorFunction for 2 functions on the same plot. I only want the cubic equation to change colour. ...
1
vote
2answers
294 views

Coloring vertices using GraphPlot

I have the following problem: I used GraphPlot to plot my adjacency matrix. I divided my nodes in three groups: ...