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

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3
votes
1answer
105 views

DensityPlot with the same color scale in Show

I am trying to align color scale for continuous plots that have different ranges. Here the color scale exhibits a discontinuity even with the same PlotRange ...
2
votes
1answer
84 views

ColorDataFunctions applied to Tables of Graphics?

I'm trying to make a graphic according to a List, n. n has integer values that go from ...
1
vote
1answer
119 views

How to color-code a 3D point plot

I am doing a Finite Difference Method for 3D heat diffusion, so I need my ListPointPlot3D to be color coded on a range from deep red to deep blue depending on the temperature of the point. My ...
18
votes
1answer
299 views

Color degrades when using Copy As Bitmap

I have discovered a problem that affects my use of Mathematica. When I use the menu command Edit > Copy As > Bitmap the colors in the copy are subtly degraded. To make this more apparent I copied ...
3
votes
2answers
146 views

Color vector according to angle

One can use the function VectorColorFunction in VectorPlot3d to color vectors according to their norms. How to color vectors ...
7
votes
3answers
221 views

ListPlot will not color markers in accordance with my color function

I have the following color table: colTable = {{Black}, Table[{Blend[{Blue, Green, Yellow, Red}, x]}, {x, 1/2000, 1, 1/2000}]}; colTable = Flatten[colTable]; ...
2
votes
1answer
50 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
350 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. e....
0
votes
0answers
22 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
94 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
43 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 ...
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"] ...
4
votes
2answers
436 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
190 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. ...
3
votes
1answer
134 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
834 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
187 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 ...
6
votes
1answer
460 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
116 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
115 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
223 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
251 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
233 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
91 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
43 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
22 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
800 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 etc....
19
votes
3answers
3k 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
2k 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 ...
0
votes
2answers
74 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
144 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
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
92 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
114 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
723 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
211 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}}] ...
3
votes
2answers
144 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? ...
5
votes
2answers
129 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 ...
23
votes
3answers
1k 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
182 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
109 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
94 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
50 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 ...
10
votes
3answers
457 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
127 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 ...
12
votes
1answer
690 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 ...
6
votes
2answers
145 views

RGBColor, ColorSlider and ColorSetter

A single RGBColor expression displays as a little square, showing the color. I just found that this little square is both a tooltip and a button. It seems to be new ...