Too many output arguments

My code below yields the error: Error using alpha

Too many output arguments.

I don't understand why. How can I fix this?

m = size(alpha,1);

if m == 1

alpha = alpha';

end

h = (b-a)/N; %the step size

t(1) = a;

w(:,1) = alpha; %initial conditions

for i = 1:N

k1 = h*f(t(i), w(:,i));

k2 = h*f(t(i)+h/2, w(:,i)+0.5*k1);

k3 = h*f(t(i)+h/2, w(:,i)+0.5*k2);

k4 = h*f(t(i)+h, w(:,i)+k3);

w(:,i+1) = w(:,i) + (k1 + 2*k2 + 2*k3 + k4)/6;

t(i+1) = a + i*h;

end

[t' w']

%function relating the right-hand side of the differential equation

%it has to be changed accordingly to the problem at hand

%in this case, the system of differential equations is:

%dy1/dt = y2

%dy2/dt = -y1 - 2exp(t) + 1

%dy3/dt = -y1 - exp(t) + 1

%change it before proceeding to the command line

function dy = f(t, y)

dy = [y(1) - y(2) + 2; -y(1) + y(2) + 4*t; 0];

Answer 1

[Star Strider]

The alpha (link) function sets the face transparency for graphics objects. It has no outputs.

The solution is to rename your variable something else, perhaps ‘alfa’.