CODEWITHSUNDEEP
matlabplot
BlueBit
BlueBit

Reputation: 397

How define a range of a specific color for plotting in MATLAB

I have a dataset with at least 10 different classes. In each class, i have at least 20 data points. When i use 'scatter plot', my dataset plots with different colors to make different between data points based on their classes. But, I am going to plot my dataset with range of a specific color such as blue, i.e., from dark blue to light blue.

How we can define a range of a specific color for a plot in MATLAB?

Upvotes: 0

Views: 1466

Answers (1)

Amro
Amro

Reputation: 124563

Consider the following example:

%# some random xy points with random 1 to 10 classes
data = [rand(100,2) randi([1,10],[100 1])];

%# colormap from dark to light blue: 10-by-3 matrix
clr = linspace(0,1,10)';
clr(:,2:3) = 0;
clr = fliplr(clr);

%# scatter plot
scatter(data(:,1), data(:,2), 10, clr(data(:,3),:))
colormap(clr), colorbar    %# fake color legend

plot

So label=1 is mapped to [0,0,0] (dark blue or just black) up to label=10 which is mapped to [0,0,1] (full blue color)

Ok my colormap is not the best, perhaps you should use one of the builtin ones. For example, replace it with:

clr = winter(10);    %# or: cool(10)

in the above code

Upvotes: 0

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