Where is the error in prompt function in this code?

for i= 1:4
    disp (['enter an angle in degrees']); 
    x = input(prompt)
    y(x) = cos (x); 
    plot (x,y); 
end 
y

Answer 1

[Walter Roberson]

prompt is not a defined variable. Perhaps you should have used

prompt = 'enter an angle in degrees: ';

Note that your prompt talks about degrees, but cos() works in radians. cosd() works in degrees.

Your code would work (not crash) if the user happened to enter a positive integer, but what if the user happened to enter 0 or negative? y(x) when x is 0 would be a problem.