Unable to perform assignment because the left and right sides have a different number of elements

I am getting the message, in the title when trying to run this code. How do I sort this?

% Euler's Method

% Initial conditions and setup

h = 0.1; % step size

x = 0:h:4; % the range of x

y = zeros(size(x)); % allocate the result y

y(i) = (2); % the initial y value

n = numel(y); % the number of y values

% The loop to solve the DE

for i=1:n-1

f = y(i)*cos(x).^2;

y(i+1) = y(i) + h * f;

end

Answer 1

[JESUS DAVID ARIZA ROYETH]

congratulations! ,you did very well, just a few small changes:

% Euler's Method
% Initial conditions and setup
h = 0.1;  % step size
x = 0:h:4;  % the range of x
y = zeros(numel(x),1);  % allocate the result y
y(1) = (2);  % the initial y value
n = numel(y);  % the number of y values
% The loop to solve the DE
for i=2:n
    f = y(i-1)*cos(x(i-1)).^2;
    y(i) = y(i-1) + h * f;
end
syms Y(X)
yy=matlabFunction(dsolve(diff(Y)==Y*cos(X).^2,Y(0)==2));
figure;
plot(x,y,'r*-',x,yy(x),'b*-');
legend('Euler','Real')

[Skye Cameron]

Hi, you might be able to help me? This is the question I have been given and I thought my code would give me what I am looking for but it doesnt seem to be?

[JESUS DAVID ARIZA ROYETH]

you did very well, just a few small changes:

% Euler's Method
% Initial conditions and setup
h = 0.1;  % step size
x = 0:h:4;  % the range of x
y = zeros(numel(x),1);  % allocate the result y
y(1) = (2);  % the initial y value
n = numel(y);  % the number of y values
% The loop to solve the DE
for i=2:n
    f = y(i-1)*cos(x(i-1)).^2;
    y(i) = y(i-1) + h * f;
end
syms Y(X)
yy=matlabFunction(dsolve(diff(Y)==Y*cos(X).^2,Y(0)==2));
figure;
plot(x,y,'r*-',x,yy(x),'b*-');
legend('Euler','Real')