How can I tag or label each plotted data point with its sequence number?

I would like to tag or label each plotted data point, in each line, with its sequence number.

Answer 1

[MathWorks Support Team]

The following code illustrates how this might be done:

% Create random data

m1 = rand(10,2);

m2 = rand(10,2);

% Calculate label displacement

lbl_dwn = .03*max([m1(:,2) m2(:,2)]);

% Plot data

f = figure;

hold on

plot(m1(:,1), m1(:,2), 'b.-')

plot(m2(:,1), m2(:,2), 'g.-')

% Create an array of sequence numbers (you can use other tags)

s = size(m1);

sequence = 1:s(1);

sequence = num2cell(sequence);

data_labels = cellfun(@num2str, sequence, 'UniformOutput', false);

% Display text

text(m1(:,1), m1(:,2)+lbl_dwn(1), data_labels,...

'Color', 'b',...

'HorizontalAlignment', 'Left')

text(m2(:,1), m2(:,2)+lbl_dwn(2), data_labels,...

'Color', 'g',...

'HorizontalAlignment', 'Left')