Velocity of a ball graph, Too many output arguments error

I am trying to graph the relationship between the angle that the ball is launched at and its distance but i keep getting the error ' too many output arguments, below is attached the code and the task

function DTask1_f(v, theta)
h0 = 1.8; %Inital height
A  = 9.8; %Acceeleration

t = linspace(0,10,100);
x = v*cos(theta*(pi/180))*t;
y = h0+(v*(sin(theta*(pi/180))))*t-(0.5*A*t.^2);

n=find(y<0);

if isempty(n) == 1
    disp('The ball does not hit the ground in 10 seconds')
    d = NaN;
elseif isempty(n) == 0
    d = x(n(1));
end

fprintf('The ball hits the ground at a distance of %1.4f meters.\n',d)



v = 60;
theta = 0:1:60;
distance = zeros(1,61);
for i = 1:60
    distance(i)=DTask1_f(v,theta(i));
end
figure
plot(theta,distance);
xlabel('Initial angle (deg)');
ylabel('Distance thrown (m)');
title('Distance of ball thrown as a function of release angle');
legend('v= 4 m/s')
end

Answer 1

[Chunru]

Put the function at the end of the script or in a different file. Add the out put "d=.." in your function header.

v = 60;
theta = 0:1:60;
distance = zeros(1,61);
for i = 1:60
    distance(i)=DTask1_f(v,theta(i));
end

The ball does not hit the ground in 10 seconds
The ball does not hit the ground in 10 seconds
The ball does not hit the ground in 10 seconds
The ball does not hit the ground in 10 seconds
The ball does not hit the ground in 10 seconds

figure
plot(theta,distance);
xlabel('Initial angle (deg)');
ylabel('Distance thrown (m)');
title('Distance of ball thrown as a function of release angle');
legend('v= 4 m/s')

function d=DTask1_f(v, theta)
h0 = 1.8; %Inital height
A  = 9.8; %Acceeleration
t = linspace(0,10,100);
x = v*cos(theta*(pi/180))*t;
y = h0+(v*(sin(theta*(pi/180))))*t-(0.5*A*t.^2);
n=find(y<0);
if isempty(n) == 1
    disp('The ball does not hit the ground in 10 seconds')
    d = NaN;
elseif isempty(n) == 0
    d = x(n(1));
end
%fprintf('The ball hits the ground at a distance of %1.4f meters.\n',d)
end