What's wrong with this code?
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I am getting this error msg. Please find me the mistakes here.
In an assignment A(I) = B, the number of elements in B and I must be the same.
r=[2.0 3.1 3.5 3.65 3.84 3.95];
x=[];
x(1)=0.35;
f=@(x) r*x*(1-x);
N=40;
for t=1:N-1;
x(t+1)=f(x(t));
end
hold on
plot(x,'r-')
0 个评论
回答（2 个）
Joseph Cheng
2014-3-21
1 个投票
yes thats because you are including information that is not here and in your other posting that was flagged. but looks like you have it so we're all set?
3 个评论
Joseph Cheng
2014-3-21
only rude comment from me would be that posting on a forum for assignment questions involving things besides what type of functions to use, function errors, random matlab issues, and approaches to handling data is cheating. The Teaching Assistant or office hours should be where assignment related questions be asked.
Star Strider
2014-3-21
And it’s not cheating to have MATLAB Answers do your homework for you?
Joseph Cheng
2014-3-21
编辑：Joseph Cheng
2014-3-21
Were you attempting to do this?
r=[2.0 3.1 3.5 3.65 3.84 3.95];
x=[];
x(1,:)=0.35*ones(size(r));
f=@(x) r*x*(1-x);
N=40;
for t=1:N-1;
x(t+1,:)=f(x(t));
end
hold on
plot(x)
legend('r = 2.0','r = 3.1', 'r = 3.65')
Where the first value of x is 0.35? or you can re-write it such that the function
f=@(x,r) r*x*(1-x);
such that you write a for loop to cycle in the r you need.
8 个评论
Joseph Cheng
2014-3-21
x(1,:)=0.35 *ones(size®) initializes x for each instance of r
Joseph Cheng
2014-3-21
Oh this is what you're trying to do. http://www.mathworks.com/matlabcentral/answers/122616-execute-this-into-proper-matlab-code
Star Strider
2014-3-21
Thanks for finding that, Joseph.
A parallel thread and I’m outahere!
Sam
2014-3-21
Joseph Cheng
2014-3-21
编辑：Joseph Cheng
2014-3-21
and for the information given so far i've shown you how to get each f(x) as a function of x for each of the r's. and we've explained the error.
Sam
2014-3-21
Joseph Cheng
2014-3-21
no it doesn't make sense. how do they look different? shape? amplitude?
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