Error using plot Vectors must be the same length.

The question is:

Plot 2 curves in the same graph: y1=5*sin^2(u) and y2=5*cos^2(u), where u is in degrees from 0 to 180, with an increment of 1 degree.

Use the plot function which will show the label for F on the left side, and the label for G on the right side of the plot.

Label the horizontal axis as u (deg) and the vertical axes as F (kg) and G (kg).

Make a title: “Trigonometric Square Shapes”. Set the fontsize of title to be 14.

Specify the ‘xtick’ for u to be from 0 to 180 with an increment of 30. Finally, add the grid to figure(2).

I've finished the coding which is:

u = 0:1:180;

y1 = 5*(sin(u).^2);

y2 = 5*(cos(u).^2);

plot(x, y1, x, y2)

title('\fontsize{14}Trignometric Square Shapes')

grid on

xlabel('u (deg)')

xticks(0:30:180)

yyaxis left

ylabel('F (kg)')

yyaxis right

ylabel('G (kg)')

However, when I run it, an error appears

Error using plot 
Vectors must be the same length.

How can I change my code to correct this error?

Answer 1

[Walter Roberson]

plot(u, y1, u, y2)

[Ariel Chou]

Thank you haha. I forgot my x is actually u. I made a silly mistake.