Plotting graphs with different colours for each line

Good afternoon. I have lots of sets of data. The frequency range is 120:135 Hz and my other variable if f in the code below. I want to plot a graph of t,x(:,6), this will have five lines on it (one line for each value of f) when I plot it the lines are all blue, how do I change the colours?

my data is saved as follows: varying_u_freq_XXX_u_YYY.mat where XXX and YYY vary to specify different data sets.

Here is my code:

clf;
hold on;
for freq=(135);
for    f=(0.02:0.02:0.1);
    load( ['varying_u_freq_' ,num2str(freq) '_u_' ,num2str(f) '.mat'] );
    fprintf('.');
    %figure
    plot(t,x(:,6));
    title('frequency range vs mean voltage')
    xlabel('frequency range (Hz)')
    ylabel('mean Voltage (v)')
end
end
fprintf('\n');

thanks for your help

Answer 1

[jeff wu]

try this

for other colors you have to use the rgb code

colors = {'red', 'green', 'blue', 'cyan', 'magenta', 'yellow'}
for freq=(135);
i = 1;
for    f=(0.02:0.02:0.1);
    load( ['varying_u_freq_' ,num2str(freq) '_u_' ,num2str(f) '.mat'] );
    fprintf('.');
    %figure
    plot(t,x(:,6),colors{i});
    title('frequency range vs mean voltage')
    xlabel('frequency range (Hz)')
    ylabel('mean Voltage (v)')
    i = i+1;

end
end
fprintf('\n');