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

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3
votes
1answer
284 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 ...
5
votes
1answer
471 views

Apply color function to matrix plot

I want to apply the following color rules to a large table of numbers. I have extracted a part of the table to use as an example. I would like to assign 5 different colors to 5 different ranges of ...
0
votes
2answers
245 views

How can I get a PieChart to be colored as I wish?

How to use the value of a funtion[label] to assign color to a piece of the pie? (edited after answer of kguler ) My dude is how to control the colors in ranges of a function of [labels] In this way ...
7
votes
3answers
310 views

Different colors for nodes in tree plot

I have some list of numbers which I am plotting using TreePlot. This is the code: ...
3
votes
3answers
343 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
1answer
142 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 ...
0
votes
1answer
320 views

Calculate the centroid of a group of pixels with the same PixelValuePositions

My question is about how to recognise objects in a image. I would like to recognise objects of the same color. Then I want to calculate the centroid of these objects. I want to apply this calculation ...
1
vote
2answers
493 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. ...
2
votes
3answers
226 views
12
votes
5answers
691 views

Default Chart Color Doesn't Match

I have looked through other posts to find out what the default plot color is, but when I use it, the color doesn't seem to match. Can anyone explain why I'm seeing different output? The reason I ask ...
3
votes
1answer
432 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: ...
0
votes
2answers
128 views

Coloring selected elements of a list created with Table [duplicate]

I have a function that returns a list of 100+ elements, using Table[]. For simplification, let's assume that it's just ...
4
votes
2answers
200 views

Coloring the points in a ListPlot with the value of another function [duplicate]

I'm a relative beginner in Mathematica, but after reading the forums for a long time, I couldn't understand one thing: I want to plot a list h. Let's call it ...
2
votes
2answers
350 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 ...
1
vote
0answers
43 views

How do I change a ColorFunction filling to be top-down as opposed to left-right? [duplicate]

I've been stuck on a seemingly simple Graphics issue for quite a while now... I am trying to make a temperature distribution Plot that will have a colorFunction filling to show red when at a higher ...
0
votes
2answers
287 views

RGB numbers for pastel colordata [duplicate]

How can I get the rgb numbers for colors that show up in the colordata "pastel" so I can use them inside a regionplot? I am combining several regionplots and I would like each of the regionlots to be ...
10
votes
3answers
1k views

Which ColorFunction should I use to get such a gradient of blue-cyan-green-yellow-orange-red?

I want to get the effect in the above Figure. Here is my code: ...
1
vote
1answer
260 views

Part::pspec error returned when using a ListLinePlot ColorFunction variable as list index

In ListLinePlot, I'm attempting to construct my own ColorFunction for coloring points differently based on a third dimension of data not plotted to a specific axis. However, ColorFunction only uses ...
6
votes
4answers
1k views

Discrete ColorData scheme with n colors?

I am trying to visualize a problem I am working on. For this, I need $n$ distinct colors which are preferably easy to distinguish. (Obviously, the higher the $n$ is, the harder it is to distinguish ...
4
votes
2answers
195 views

GraphPlot with black edges no rendering function

Is there any way to make the edges of a GraphPlot black without tediously writing out a long "EdgeRenderingFunction"? I guess you could ask the same kind of question about vertex labeling. For ...
11
votes
1answer
235 views

What is the default ColorFunction for Image3D?

What is the default ColorFunction for Image3D? I find it a bit confusing that the most intense colour is not shown where the ...
3
votes
1answer
254 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 ...
7
votes
2answers
318 views

Union of plotted regions as sum of colors

I wish to plot 2 functions $f$ and $g$ so that the region bounded by $f$ has color $c_f$, the region bounded by $g$ has color $c_g$, and the region bounded by both has color $c_f+c_g$. E.g. $c_f$ is ...
5
votes
1answer
110 views

Odd colourization for FourierParameters. UI bug?

The Mathematica UI colourizes the FourierParameters in the following ...
2
votes
2answers
324 views

Colors for multiple piecewise functions

I have the following $3$ piecewise functions, and I would like that f1, f2 and f3 have $3$ ...
13
votes
1answer
2k views

Logarithmic scale in a DensityPlot and its legend

I was recently faced with the task of creating a DensityPlot with a logarithmic colour scale, and with providing it with an appropriate legend. Since I could not find any resources to this effect on ...
1
vote
1answer
240 views

How to color ParametricPlot3D based on the parameter?

I have a set of ODEs I am solving, and then plotting (several) trajectories of in ParametricPlot3D. I want to have a color of each plot reflect the time (i.e. the Parameter) at that point. I tried ...
2
votes
1answer
184 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 ...
6
votes
3answers
391 views

Fill circle layers with colors according to read values from a plotted curve

I want to read (temperature) values from plotted (cooling) curves and visualize them in layered circles. I have an example made manually for clarification: 3 plotted curves, at certain time steps ...
10
votes
1answer
458 views

How to find a specific color in one picture?

In a picture, there are many different colors. How can I just want to find the position of one color. In the following picture, if I would like to find the coordinates of the position of blue, how can ...
3
votes
1answer
117 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 ...
6
votes
1answer
338 views

My black text isn't black after exporting to PDF

Consider any standard plot, with true CMYK black text: ...
2
votes
1answer
198 views

How can I mix colors?

As far as I know if you combine Blue and Green the result is Cyan (using additive mixing). ...
1
vote
1answer
167 views

Remove overlapping red and green color

How to remove overlapping red and green color regions, leaving only red ones?
1
vote
1answer
179 views

Gradually coloring edges in terms of their vertices colors

In order to color Edges in a Graph after applying a function such as VertexDegree I did the ...
1
vote
1answer
429 views

Invert Colors Stylesheet White on Black

There have been a couple studies done that showed that white text on a black background increase recall of data. Although this is certainly debatable how might I invert the colors of Notebook font ...
0
votes
1answer
180 views

Adding labels on ArrayPlot and coloring rows

I need to add lables on the right from ArrayPlot for each row and color the black square of each row depending on values from two list. Color list has a numbers in some range and should be mapped ...
1
vote
1answer
643 views

Want more vibrant colors in plots

Is it possible to create plots that have vibrant colors like those I create in Python? For instance, take this thread function returning 0 where I used rainbow and here is the temperature gradient: ...
6
votes
2answers
592 views

Adjusting Density Plot Color Function for Diffraction Simulation

I'm trying to simulate Fraunhofer diffraction by a single slit using DensityPlot I run the code: ...
1
vote
2answers
556 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: ...
25
votes
5answers
625 views

Compiling ColorFunction for faster complex phase-amplitude plots

I have gotten into the habit of plotting complex-valued functions on a plane using a color-function along the lines of ...
4
votes
2answers
236 views

CMYK colours changing

If I draw a coloured diagram like Graphics[{CMYKColor[0, 0.83, 1, 0], Rectangle[{0, 0}], CMYKColor[1, 0, 0, 0], Rectangle[{0.5, 0.5}]}] and select the red ...
12
votes
2answers
361 views

Color Histogram3D by Bin Location

I am using a Histogram3D plot to view the correlation of the R & G of an RGB image. Naturally, I want the bins to have a color corresponding to their $x$, $y$ ...
1
vote
2answers
144 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 ...
13
votes
3answers
881 views

How can I convert colors to grayscale?

I want to change the above colored plot into a grayscale plot. I have tried this: CCGray[pic_?ImageQ] := Module[{}, ColorConvert[pic, "GrayScale"]]; but it ...
3
votes
1answer
232 views

Filling using colors rendered corresponding to the difference between two curves

Suppose there are two curves f1[x] and f2[x], and we want to fill the area between them using colors corresponding to the vaule ...
1
vote
1answer
151 views

How to keep front and back colors of Polygon in Graphics3D same all the time [duplicate]

I want the same face color for a 3D Polygon when viewed from front or back or from any angle. i.e. I want the color not changed under any conditions. Front and ...
5
votes
1answer
184 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
1answer
155 views

Time ColorFunction

I have the following data ...
1
vote
2answers
207 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: ...