Not enough input arguments.

2021 1 9
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回答已采纳
更新时间：2021 1 13
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function [u] = suitem(A,b,u1,nb)
[n,n] = size(A) ;
u=u1 for i = 1 : nb
u= A*u +b
end
end

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 采纳的回答

Walter Roberson
Walter Roberson 2021-1-9
Ran in:

0 个投票

Ran in:
Other than having to fix the for being on the same line, it looks okay to me.
suitem(rand(8,8), rand, rand, 7)
ans = 8×8
5.9738 5.7873 6.4540 5.8167 5.9296 5.6976 6.9287 6.5290 6.3011 6.1045 6.8077 6.1355 6.2547 6.0097 7.3086 6.8868 6.9830 6.7651 7.5445 6.7995 6.9317 6.6601 8.0996 7.6322 6.8662 6.6519 7.4183 6.6857 6.8157 6.5487 7.9641 7.5045 7.3179 7.0894 7.9063 7.1255 7.2641 6.9795 8.4879 7.9982 7.8525 7.6073 8.4838 7.6460 7.7947 7.4894 9.1080 8.5824 5.8720 5.6887 6.3441 5.7176 5.8287 5.6005 6.8108 6.4178 5.0072 4.8508 5.4098 4.8755 4.9704 4.7757 5.8077 5.4726
●
function [u] = suitem(A,b,u1,nb)
[n,n] = size(A);
u=u1;
for i = 1 : nb
u= A*u +b;
end
end

5 个评论
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KARIM MANSOUR
KARIM MANSOUR 2021-1-12
thank you walter
KARIM MANSOUR
KARIM MANSOUR 2021-1-12
function [u] = suite(A,b,u1,nb)
[n,n] = size(A);
u=u1;
for i = 1 : nb
u= A*u +b;
end
end
A=[5/8 -1/4 1/8;1/4 0 1/4;1/8 -1/4 5/8];b=[1;-1;1];u1=[5;2;-4];m=20;p=m;
u=suite(A,b,u1;b)
u must be size [3,20] but i found it [3,1] please help
Walter Roberson
Walter Roberson 2021-1-13
Ran in:
Ran in:
Why would it be 3 x 20? You create m=20 and you assign that to p, but you do not use m or p in the code.
%{
u=suite(A,b,u1;b)
%}
That is invalid syntax. Assuming you want
%{
u=suite(A,b,u1,b)
%}
then notice that you are passing b twice, and that the second one is in a place you expect a scalar.
I suspect what you want is
A = [5/8 -1/4 1/8;1/4 0 1/4;1/8 -1/4 5/8];
b = [1;-1;1];
u1 = [5;2;-4];
m = 20; p = m;
u = suite(A, b, u1, m)
u = 3×20
5.0000 3.1250 2.9688 3.0859 3.1934 3.2593 3.2953 3.3141 3.3236 3.3285 3.3309 3.3321 3.3327 3.3330 3.3332 3.3333 3.3333 3.3333 3.3333 3.3333 2.0000 -0.7500 -0.5625 -0.0781 0.2617 0.4561 0.5593 0.6125 0.6395 0.6530 0.6598 0.6633 0.6650 0.6658 0.6662 0.6665 0.6666 0.6666 0.6666 0.6667 -4.0000 -1.3750 0.7188 1.9609 2.6309 2.9780 3.1547 3.2437 3.2885 3.3109 3.3221 3.3277 3.3305 3.3319 3.3326 3.3330 3.3332 3.3332 3.3333 3.3333
●
function [u] = suite(A,b,u1,nb)
[n,n] = size(A);
u = u1(:);
for i = 2 : nb
u(:,i) = A * u(:,i-1) + b;
end
end
KARIM MANSOUR
KARIM MANSOUR 2021-1-13
thank you this is what i want
KARIM MANSOUR
KARIM MANSOUR 2021-1-13
Walter,check please https://fr.mathworks.com/matlabcentral/answers/716073-hilbert-matrix-come-on

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