Color coding sequential data

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Charles Dorchester
Charles Dorchester 2021-3-23
回答： Aastha 2025-6-20
I'm trying to plot hysteresis curves and would like to use color coding to help decipher certain phases in the graph. In other words, I would describe this as plotting 12 discrete points on a graph, representative of individual hours on a 12 hour clock, each discrete point would plot at a certain point around the circle, but instead of numbers indicating where we are in time, a colormap would help distinguish this. I'm not sure what to call this, so my online searching has not been helpful.
% Here is my code currently, which does not include a time-based
% color-coding at the moment
figure(99)
hold on
for i = 1:6
subplot(2,3,i)
plot(fluid_conductivity(:,i),conductivity_bulk,'r-x')
end
hold off
Attached is an image of someone else's graph that has accomplished this in case the description above is confusing.

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回答（1 个）

Aastha
Aastha 2025-6-20
Hi @Charles Dorchester,
It is my understanding you want to colorcode the points on your graph according to a colormap. To create a visualization similar to the image attached in the question, you can use the "scatter" function in MATLAB to assign color indices using a colormap.
You may refer to the following MATLAB code snippet:
c = 1:4; % Specify color using a colormap index
scatter(1:4, [2 5 3 7], [], c)
colormap(gca, "winter")
Alternatively, you can specify the color using RGB triplets as a vector corresponding to the data you wish to visualize:
% Specify color using RGB triplet
c = [0 1 0; 1 0 0; 0.5 0.5 0.5; 0.6 0 1];
scatter(1:4,[2 5 3 7],[],c)
For more information on the "scatter" function, kindly refer to the following MathWorks documentation:
https://www.mathworks.com/help/matlab/ref/scatter.html#btrj9jn-1-c
I hope this helps!

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