I am having trouble plotting this,

function [ Cl, Cd, E, Emax ] = Lift_Drag( alpha, Cd0, A, e )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here



%% k is a factor used to represent lift induced drag.

k = 1/(pi*A*e);

%% Calculation for coeffficient of lift.

Cl = 0.25 + (0.1*alpha);

%% Emax represents the max value for the lift to drag ratio.

Emax = 0.5*(sqrt((pi*A*e)/(Cd0)));

%% Calculation for the coefficient of drag.

Cd = Cd0 + k *(Cl^2);

%% E denoting the lift to drag ratio.

E = Cl/Cd;

%% Description

[Dyuman Joshi]

What exactly is the trouble you are having with plotting?