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

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0
votes
1answer
133 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 ...
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votes
2answers
64 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 ...
0
votes
1answer
204 views

how to dynamically change color of setterbar

I have a SetterBar with 3 values. I want that when I hover the cursor on any of the SetterBar value,it changes its color and ...
0
votes
1answer
88 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 ...
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votes
0answers
14 views

different densityplots with same color range [duplicate]

for example, lets say there're two functions f1 and f2. 0<=f1<=1, 2<=f2<=3 but the two differs only by constants. (e.g. f1[x_,y_]:=(Sin[x]Sin[y])^2, f2[x_,y_]:=(Sin[x]Sin[y])^2+2) what i ...
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votes
0answers
138 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 ...
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0answers
33 views

Scaling at density plot [duplicate]

I have two data set: One's range is between 0 and 0.5 and another's range is between -0.2 to 0.3. I want to draw two density plots with common scale: from -0.5 to 0.5. How can I fix the scale? ...
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votes
0answers
135 views

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

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 insert a framed number/text into a ...
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0answers
74 views
-9
votes
2answers
367 views

Color plot markers using If statement

I am calculating eigenvlaues. Some are negative, some are positive. I define the index nn and mm (as well as np and mp) of each matrix element by some functions that assign positive, zero and negative ...