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How would i make line x vectors to be even to the rest. To form three different lines on the graph. Also how do you make the points show up with like a circle, square and x.

x = linspace(5,(-2*pi),(2*pi));

x1 = linspace((-2*pi),(2*pi),10);

x2 = linspace((-2*pi),(2*pi),20);

y = sin(x);

axis([-6, 6, 0, 1])

plot(x,y, 'r')

hold on

plot(x1,y, 'g')

hold on

plot(x2,y, 'p')

title('Plot Comparison of sin(x)')

xlabel('x values')

ylabel('sin(x)')

legend('5 points','10 points','20 points')

per isakson
on 25 Oct 2020

Edited: per isakson
on 25 Oct 2020

The statement

x = linspace(5,(-2*pi),(2*pi));

looks strange to me. On R2018b it creates a row vector of length 6, which suprises me. Did you mean

x = linspace((-2*pi),(2*pi),5);

The two statements

plot(x1,y, 'g')

plot(x2,y, 'p')

will throw errors, since the length of x1 and y differs. They are 10 and 6, respectively. And the length of x2 and y also differs.

"points show up with like a circle, square and x" with 'o', 's' and 'x', see plot, 2-D line plot (and browse the entire page)

per isakson
on 25 Oct 2020

I assume this is your homework. Am I right? Thus, I provide hints.

Regarding the markers, read the documentation on plot.

interp1 is most likely not what your teacher intended.

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