Coloring scatter plot based on count number

Hi,

I have a table (results) with time as a first column (result.time) and the count of an event in the second (result.event). I would like to plot the counts through time and colour the dots depending on the count number.

This is the start of my table:

time = ({'25-Jul-2018 00:00:00';'25-Jul-2018 00:15:00';'25-Jul-2018 00:30:00';'25-Jul-2018 00:45:00';'25-Jul-2018 01:00:00';'25-Jul-2018 01:15:00';'25-Jul-2018 01:30:00';'25-Jul-2018 01:45:00';'25-Jul-2018 02:00:00';'25-Jul-2018 02:15:00';'25-Jul-2018 02:30:00';'25-Jul-2018 02:45:00';'25-Jul-2018 03:00:00';'25-Jul-2018 03:15:00';'25-Jul-2018 03:30:00';'25-Jul-2018 03:45:00';'25-Jul-2018 04:00:00';'25-Jul-2018 04:15:00';'25-Jul-2018 04:30:00';'25-Jul-2018 04:45:00'})
time = datetime(time,'InputFormat','dd-MMM-yyyy HH:mm:ss');
event = ([0; 1; 0; 1; 0; 0; 2; 0; 0; 4; 0; 0; 0; 0; 0; 0; 0; 5; 10; 2])
results = table(time,event)
scatter(results.time,results.event)

In the scatter plot, I would like the event markers to be coloured differently depending on their value (e.g. from yellow for small numbers to red for bigger numbers).

I have found some interesting ideas there: https://in.mathworks.com/matlabcentral/answers/28849-coloring-scatterplots-based-on-frequency-of-point-occurrence-in-input but it is not exactly what I need.

Many thanks for your help!

Answer 1

[Adam Danz]

Unchanged base code

time = ({'25-Jul-2018 00:00:00';'25-Jul-2018 00:15:00';'25-Jul-2018 00:30:00';'25-Jul-2018 00:45:00';'25-Jul-2018 01:00:00';'25-Jul-2018 01:15:00';'25-Jul-2018 01:30:00';'25-Jul-2018 01:45:00';'25-Jul-2018 02:00:00';'25-Jul-2018 02:15:00';'25-Jul-2018 02:30:00';'25-Jul-2018 02:45:00';'25-Jul-2018 03:00:00';'25-Jul-2018 03:15:00';'25-Jul-2018 03:30:00';'25-Jul-2018 03:45:00';'25-Jul-2018 04:00:00';'25-Jul-2018 04:15:00';'25-Jul-2018 04:30:00';'25-Jul-2018 04:45:00'});
time = datetime(time,'InputFormat','dd-MMM-yyyy HH:mm:ss');
event = ([0; 1; 0; 1; 0; 0; 2; 0; 0; 4; 0; 0; 0; 0; 0; 0; 0; 5; 10; 2]);
results = table(time,event);

Define color

scatter(results.time,results.event, 90, results.event, 'filled')

set colormap

colormap(flipud(autumn(255)))
cb = colorbar(); 
ylabel(cb, 'Count')  % redundant with y-axis

[Butterflyfish]

Thank you very much!