How to give color to data?

figure(1)
plot(epoch_1,Javad0081_Round_1)
hold on
k=0.5;
plot(epoch_1,k+Javad0082_Round_1)
hold off

If my data for the epoch_1 = 1:668;

Javad0081_Round_1 = 668*36; 2D data. Please see the attachment and I want to plot 669 to x axis and all 36 column on y axis mentioning that the Prn1= column1......

So during plot row will be plot and column will be plot in different column. But how to give the name as per color ? I did not mention that this color so how will mention that this color is for red -column1 , blue - column2, ..................upto 36.

Answer 1

[Anudeep Kumar]

Hey vimal,

From what I understand you might want to explore the 'Color' and 'DisplayName' Name-Value argument of the plot function.

Given your data and what you want to achieve, the below code snippet should help you plot color wise columns in a single figure.

%Assuming epoch_1 is defined as
epoch_1 = 1:size(Javad0081_Round_1, 1);

% Create a new figure explicitly
fig = figure;

% Hold on to plot multiple lines
hold on;

% Define a colormap with 36 unique colors
colors = lines(36);  % You can also try 'jet', 'parula', etc.

% Plot each PRN column
for i = 1:36
    plot(epoch_1, Javad0081_Round_1(:, i), 'Color', colors(i, :), 'DisplayName', ['PRN' num2str(i)]);
end

% Add labels, title, and legend
xlabel('Epoch');
ylabel('Measurement Value');
title('PRN Measurements Over Epochs');
legend('Location', 'eastoutside');
grid on;
hold off;

I have attached the documentation of plot function especailly the 'Color' and 'DisplayName' property section for your refernce and better understanding

https://www.mathworks.com/help/releases/R2024b/matlab/ref/plot.html

https://www.mathworks.com/help/releases/R2024b/matlab/creating_plots/add-legend-to-graph.html