Change LineWidth with each loop

I have a code that computes different values for variable "component" in each iteration of a for loop and then plots this variable in subplot(3,1,1). With each click/button press I get a new curve added to subplot(3,1,1). I want the last curve that was plotted to stand out by having a thicker LineWidth.

clear all
fs = 10000;
t = 0 : 1/fs : 1;

component = 0;
sig = 0;
N = 10;                                                      %Number of iterations

for i = 1:N
    f(i) = 2^(i-1);
    waitforbuttonpress                                       %button press or click
    component = (100/i)*sin(2*pi*f(i)*t);                    %variable computed with each iteration
    sig = component + sig;                                   %ignore this variable
    subplot(3,1,1)
    plot(t, component, 'color', rand(1,3), 'LineWidth', 2)   %variable "component" is plotted with LineWidth = 2
    hold on
    subplot(3,1,2)                                           %ignore this plot
    plot(t,sig, 'LineWidth', 2)                              %ignore this plot
end

close
clear all

For example, if I already have 4 curves on subplot(3,1,1), each having LineWidth = 0.5 and I press a button, the 5th curve must be added with LineWidth = 2. With the next button press, the 5th curve must change to LineWidth = 0.5 (same as the curves that came before it) and the 6th curve must have LineWidth = 2. This way the most recent curve will stand out.

Any ideas?

Answer 1

[Steven Lord]

Store the handles to the lines (or find the handles to the lines each time with findobj or findall).

set the LineWidth for all the existing lines to 0.5. [For most of the lines this will be a no-op, but that's okay.]

Finally create the new line with LineWidth 2.