Plotting the graph of (4*x*sinx − 3)/(2 + x^2 )

f(x) = (4*x*sinx − 3)/(2 + x^2 ) for 0 ≤ x ≤ 4

How can I plot the graph of this function?

x=linspace(0,4,400);

y=((4.*x.*sin(x))-3)/(2+x.^2);

z=zeros(1,400);

figure

plot(x,y)

hold on

plot(x,z,'--')

title('Plot of (4*x*sin(x)-3)/(2+x^2)')

This code does not work.

Answer 1

[VBBV]

Use the element wise division for the equation

x=linspace(0,4,400);

y=((4.*x.*sin(x))-3)./(2+x.^2);
                   %^  use element wise division 
z=zeros(1,400);
figure 
plot(x,y)
hold on 
plot(x,z,'--')
title('Plot of (4*x*sin(x)-3)/(2+x^2)');