Assigning Color to Plot of Same Variable?

So I am plotting the same variable 3 times within one figure that's parameters change with simulink. It produces 3 lines but the problem is, the 3 lines are the same color even though I specify each of the plots to be different linewidth, color and legend. It produces the very last specific color values.

I tried the following

plot(t,x, 'Color', 'Black', 'Linewidth', 2);
legend('Black');
hold on;
plot(t,x, 'Color', 'Cyan', 'Linewidth', 2);
legend('Cyan');
hold on;
plot(t,x, 'Color', 'Blue', 'Linewidth', 2);
legend('Blue');

All the lines on the graph show up as Blue even though I specified different colors/legend for each of the lines.

Answer 1

[Image Analyst]

Try this

plot(t, x, 'k-', 'LineWidth', 2);
hold on;
plot(t, x, 'c-', 'LineWidth', 2);
plot(t, x, 'b-', 'LineWidth', 2);
legend('Black', 'Cyan', 'Blue');

[Brandon Luciano]

Still get the same last color entered for all which is blue in this case.

[Image Analyst]

That's because all plots are on top of each other because you're plotting the same thing 3 times. So either make the first plots have a thicker LineWidth (like 5, then 3, then 1), or plot x1 in the first call to plot(), x2 in the second call to plot(), and x3 in the third call to plot(), not x every single time.

[Brandon Luciano]

I realize I am plotting the same variable but the variable is dependent on a block diagram defined in Simulink which results in the graph displaying 4 unique lines. They aren't the same line overlayed but rather 4 lines at different points.

By changing the variable x1, this will break the block diagram functionality, that's why I was wondering if there's a way to avoid that.

I will settle for that the random 4 colors MATLAB assigns and just leave the linewidth.

[Image Analyst]

You can set the default color order if you want so the colors are not "random". See attached demo.

[Brandon Luciano]

Thank you. This was helpful.