Write an Mfile to evaluate the equation yx x2 3x 2 for al

Write an M-file to evaluate the equation y(x) = x^2 - 3x + 2 for all values of x between -1 and 3, in steps of 0.1. Do this twice, once with a for loop and once with vectors. Plot the resulting function using a 3-point-thick dashed red line.

Solution

function y = func(n)

   y = n^2 - 3*n + 2;

end

%common data

x = -1:0.1:3;

% using for loop

y1 = zeros(, 4/0.1);

j = 1;

for (i = -1 : 0.1: 3)

   y1(1,j) = func(i);

   j =j +1;

end

% using vector

y2 = arrayfun(@func, -1:0.1:3);

%to plot you can use:

p = plot(x, y1, \'r--\', \'Linewidth\', 3);