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

learn more… | top users | synonyms (2)

8
votes
6answers
286 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: ...
2
votes
1answer
39 views

Plot a function that gives a color [duplicate]

I have a function that takes in two numbers and returns a RGB color. I would like to plot that function on a 2D surface. How can I do that?
3
votes
3answers
295 views

How do I interpolate a set of points with colour varying along the curve?

I have a table with 3 columns - x position, y-position and colour. I'd like to plot these points and join them with line segments, where the colour of the line segment is determined by 3rd variable. ...
0
votes
0answers
21 views

How to get an image when having indices of pixels [duplicate]

I am doing a perspective projection of a list of voxel V={v1,v2,v3,...,vn} using the perspective projection matrix 3*4 to get the indices of each pixel pi=(xi,yi). pi=P*vi Once I get the indices, I ...
2
votes
2answers
66 views

mesh vertex coloring

So I created a mesh like this: mesh2 = ToElementMesh[FullRegion[2], {{1, 10}, {1, 10}}, MaxCellMeasure -> 1.]; and want to plot it, coloring the squares: ...
0
votes
0answers
40 views

ColorFunction on a surface [duplicate]

I have a surface in 3D space which is defined by equation in ContourPlot3D. For simplicity let me use x + y == z surface (in reality I have a transcendental ...
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"] ...
4
votes
2answers
418 views

About Hue's period

So we can see that Hue is a periodic function. Its period is 1. And the specifier from documentation. Sorry for I cannot cite my local language documentation. Let ...
4
votes
1answer
179 views

puzzled with ColorData [closed]

At first let me thank, from this point as well, those that they replied to my previous queries. From a reply I got, I obtained finally the desired graph. ...
0
votes
0answers
53 views

Color vectors according to a user-defined function

V[x_,z_]:=x/Sqrt[x^2+z^2]; Ex[x_,z_]=-D[V[x,z],x]; Ez[x_,z_]=-D[V[x,z],z]; The electric field components (Ex,Ez) are to be plotted as a vector field in the x-z ...
3
votes
1answer
109 views

How to pick a color differing significantly from the colors already in a given color list?

Suppose that we want to color a number of objects. We start by selecting some color (randomly). Then we want the color of the next object to be significantly different from the colors already used ...
8
votes
3answers
783 views

How can I set the background color to the Popupmenu?

I want to set the Background color of a PopupMenu to blue. I already searched in the documentation center, but I didn't find any ...
1
vote
2answers
108 views

Use default ListDensityPlot color scheme in ArrayPlot?

I have some data that I would like to display in an ArrayPlot. I like the default color scheme of ListDensityPlot (Mathematica ...
5
votes
1answer
329 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 ...
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
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 ...
1
vote
2answers
115 views

FillingStyle and Opacity won't work together in Mathematica

I try to plot some data in Mathematica using the ListLinePlot[]. Unfortunately the plot option ColorFunction, ...
1
vote
0answers
218 views

Frame and white background not working (all other colours are fine)

Bug introduced in 6 and fixed in 7 Though my question my be related to this one, it doesn't look like it can easily be solved in the same way, so I hope not to be double-posting. I am trying to ...
3
votes
2answers
196 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 ...
3
votes
1answer
73 views

Creating a grid of coloured points

I wish to create a grid of 31x31 points with coordinates of the form $(k/30,n/30)$ within the unit square, and give each point a colour based on the 2-adic value of both its coördinates. I plan to ...
0
votes
0answers
39 views

How to create a color ListPlot [duplicate]

Assume that I've got a list L={{1, 2, 0.1}, {2, 4, 0.2}, {3, 5, 0.3}} I want to show this list like where first point (from the left side) has a additional ...
0
votes
0answers
20 views

How to adjust ColorFunction to scale the clipped areas in ListDensityPlot? [duplicate]

I have a data set I am trying to visualize, however some of the values seem to be extra large and it's just clipped and blanks are left. I want to rescale or whatever in such a way as this white areas ...
7
votes
3answers
713 views

Color function doesn't span the whole color range in MatrixPlot

In matrix visualization, for instance, MatrixPlot[{{1, 2}, {3, 4}}, PlotRangePadding -> 0, ColorFunction -> "Rainbow"] the color map does not cover the ...
34
votes
2answers
4k views

The correct way to linearize colorspace before resizing, blurring etc

There was an interesting discussion on MathGroups dealing with the fact that image-processing functions in Mathematica (and many other software, including Adobe Photoshop) work with RGB, Grayscale ...
18
votes
3answers
2k views

Filtering pixels of a certain color

What is the best way to filter an image so that only the pixels close to a certain color are left? I've downloaded some satellite images from the web where a specific pixel color corresponds to a ...
3
votes
2answers
1k views

2D ListPlot with separate color function

Suppose a data array of the form {{x1,y1,z1},{x2,y2,z2}...}, is it possible to use ListPlot where x,y specify the point position ...
48
votes
3answers
2k views

Changing color of an object in an image

Consider the following image: How can I change all red colors in this image into (for example) blue.
0
votes
2answers
64 views

ColorFunction still interferes with PlotLegends in Mathematica 10?

I want to draw 2 functions in the same plot and I use Show for this. I am using Mathematica 10 and I still have the problem that the legend disappears for the ...
2
votes
2answers
104 views

Using color gradients in Graphics3D

I would like to use the thermometer color gradient in Graphics3D. Taking an example, I have the following: ...
2
votes
2answers
148 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
87 views

Colors on a 3D curve not working

I'm having troubles applying colors to a simple 3D curve plot. Here's the code : ...
1
vote
1answer
96 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 ...
2
votes
1answer
596 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 ...
4
votes
1answer
142 views

DensityPlot: giving the same color to a range of values

The following command DensityPlot[x y, {x, -3, 3}, {y, -3, 3}, PlotLegends -> Automatic, ColorFunction -> {"Rainbow"}, PlotRange -> {{-3, 3}, {-3, 3}}] ...
1
vote
0answers
169 views

Individual ColorFunction with RGBColor

I want to create a custom ColorFunction using RGBColor for my DensityPlot. A nice example is ...
1
vote
0answers
226 views

ColorFunction - custom colors and scaling

I am trying to specify my own colors and scaling for the ColorFunction in ListDensityPlot. I have several lists of 2D values ...
3
votes
2answers
102 views

how to use filling in Graphic plots

i'm going to plot some angles in Trigonometric circle by using Graphic command how can i use filling axes by different colors in this program or color between the angles? ...
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 ...
21
votes
3answers
847 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 ...
41
votes
6answers
3k views

ColorData[“VisibleSpectrum”] is wrong?

I am trying to visualize the visible spectrum using the built-in ColorData["VisibleSpectrum"] function which "colors based on light wavelength in nanometers". But I ...
5
votes
2answers
144 views

BarLegend using Function that uses Blend

Bug introduced in 10.0 and fixed in 10.1 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: ...
1
vote
1answer
89 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) ...
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
46 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 ...
12
votes
4answers
513 views

Quirk in VertexColors interpolation when displaying Polygon

When using VertexColors, the docs state: The interior of the polygon is colored by interpolating between the colors specified by ...
10
votes
3answers
347 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 ...
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 ...
11
votes
1answer
613 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 ...