Plotting a circle. The following script plot a circle using 101 points that appears as a circle (not an ellipse) on the plot Find the error in the script.

Question

i = 0:100; % define index array

x = cos(2*pi*i/100); % element-by-element multiplication

y = sin(2*pi*.i/100);

plot(x,y)

axis([-1 1 -1 1]) % axis limits [xmin xmax ymin ymax]

axis square % square axis

grid on % display grid

Answer 1

Solution
i = 0:100; % define index array
x = cos(2*pi*i/100); % element-by-element multiplication
y = sin(2*pi*i/100); % <-
plot(x,y)
axis([-1 1 -1 1]) % axis limits [xmin xmax ymin ymax]
axis square % square axis
grid on % display grid