what is the wrong here

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jake carl
jake carl 2020-12-24
回答： William 2020-12-24

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回答（2 个）

David Hill
David Hill 2020-12-24
h=.25;
t=0:h:1;
y=zeros(size(t));
y(1)=.1;%cannot start with y=0
f=@(t,y)(1+4*t)*sqrt(y);%I assume this is what you want
for i=1:length(t)-1
y(i+1)=y(i)+h*f(t(i),y(i));
end
plot(t,y);
grid on;
William
William 2020-12-24
David is probably right, but I made a different assumption about what equation you were trying to solve:
h = 0.25;
x = 0:h:1;
y = zeros(size(x));
y(1)=0;
n = numel(y);
t = 2;
for i=1:n-1
f = (1+4*t)*sqrt(x(i));
y(i+1)=y(i)+h*f;
end
plot(x,y);
grid on;

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