I need help plotting using this while loop

this is how my code looks like currently, I am generating the correct munbers for the fuction but it is not plotting anything. Please Help.

xx = linspace(-5,9,85);
w=0

w = 0

while w<85
    w=w+1;
    fxx = ((xx(w)+1)^2)./(2+5*xx(w));
end
plot(xx,fxx)

Answer 1

[VBBV]

xx = linspace(-5,9,85);
w=0

w = 0

while w<85
    w=w+1;
    fxx(w) = ((xx(w)+1)^2)./(2+5*xx(w));
end
plot(xx,fxx)

[VBBV]

Use an counter to create array for the variable you want to plot. if you use

xx = linspace(-5,9,85)

xx = 1×85

-5.0000 -4.8333 -4.6667 -4.5000 -4.3333 -4.1667 -4.0000 -3.8333 -3.6667 -3.5000 -3.3333 -3.1667 -3.0000 -2.8333 -2.6667 -2.5000 -2.3333 -2.1667 -2.0000 -1.8333 -1.6667 -1.5000 -1.3333 -1.1667 -1.0000 -0.8333 -0.6667 -0.5000 -0.3333 -0.1667

w = 1; %e.g.
fxx = ((xx(w)+1)^2)./(2+5*xx(w))  % a single value  

fxx = -0.6957

it will of course evaluate the equation inside the while loop but does not create an array of values but only a scalar value. Read more about plot function in This link

[Daabir Momin]

Neat! That worked, thank you for the explanation.