Too many output arguments.

1 次查看（过去 30 天）
Paul Rogers
Paul Rogers 2019-12-16
编辑： per isakson 2019-12-18
I've found this code that may help me a lot.
I cannot run, it keeps saying:
Error using type
Too many output arguments.
my version is 2014b
the code is
function [t,y]=valori(type)
a=340;
S=0.25;
x10=0.85;
U=144;
if (type == 1)
Ac=0.0034;
Vp=0.32;
Lc=0.3;
H=3.2613e4;
W=0.3689;
else
if (type == 2)
Ac=0.0033;
Vp=0.025;
Lc=1.22;
H=0.09e5;
W=0.1;
else
Ac=0.0090;
Vp=0.001;
Lc=2.8;
H=1.55e4;
W=0.1587;
end
end
[t,y]=greitzer2(a,Ac,Vp,Lc,U,H,W,x10,S);
end
function [t,y]=greitzer2(a,Ac,Vp,Lc,U,H,W,x10,S)
wh=a*sqrt(Ac/(Vp*Lc));
B=U/(2*wh*Lc);
k=x10-S*(x10-(1/3)*(x10.^3));
[t,y]=ode45(@(t,y)greitzer10(H,W,B,U,Ac,y,S,k),[0 100],[0,0]);
subplot(2,2,1)
plot(t,y(:,1))
xlabel('t')
ylabel('\phi_c')
subplot(2,2,2)
plot(y(:,1),y(:,2))
xlabel('\phi_c')
ylabel('\psi')
subplot(2,2,3)
plot(t,y(:,2))
xlabel('t')
ylabel('\psi')
end
function dydt = greitzer10(H,W,B,U,Ac,y,S,k)
dydt = [ ((3*H*Ac*B)/(W*U))*((y(1)-(1/3)*((y(1).^3)))-y(2)); ((W*U)/(3*H*Ac*B))*(y(1)-(S*y(2)+k)) ];
end
this might be a missing part:
function y=carcomp(C0,H,x,W)
y=C0+H*(1+(3/2)*((x/W)-1)-(1/2)*(((x/W)-1).^3));

请先登录，再回答此问题。

采纳的回答

per isakson
per isakson 2019-12-17
编辑：per isakson 2019-12-17
I fail to reproduce the error you report
>> [t,y] = valori( 2 );
>> [t,y] = valori( 1 );
>> [t,y] = valori( 3 );
no error, no warning and produces a figure with three diagrams.
However
>> [t,y] = valori( type );
Error using type
Too many output arguments.
>>
"type" is the name of a function that doesn't return any output. Try
>> type=1; [t,y] = valori( type );
That works, but now you'll get unexpexted results if you try to use the function, type
Conclusion: Avoid to use function names as names of variables.
  4 个评论
显示 2更早的评论
Paul Rogers
Paul Rogers 2019-12-17
function [t,y]=valori(type)
a=340;
S=0.25;
x10=0.85;
U=144;
if (type == 1)
Ac=0.0034;
Vp=0.32;
Lc=0.3;
H=3.2613e4;
W=0.3689;
else
if (type == 2)
Ac=0.0033;
Vp=0.025;
Lc=1.22;
H=0.09e5;
W=0.1;
else
Ac=0.0090;
Vp=0.001;
Lc=2.8;
H=1.55e4;
W=0.1587;
end
end
[t,y]=greitzer2(a,Ac,Vp,Lc,U,H,W,x10,S);
end
function [t,y]=greitzer2(a,Ac,Vp,Lc,U,H,W,x10,S)
wh=a*sqrt(Ac/(Vp*Lc));
B=U/(2*wh*Lc);
k=x10-S*(x10-(1/3)*(x10.^3));
[t,y]=ode45(@(t,y)greitzer10(H,W,B,U,Ac,y,S,k),[0 100],[0,0]);
subplot(2,2,1)
plot(t,y(:,1))
xlabel('t')
ylabel('\phi_c')
subplot(2,2,2)
plot(y(:,1),y(:,2))
xlabel('\phi_c')
ylabel('\psi')
subplot(2,2,3)
plot(t,y(:,2))
xlabel('t')
ylabel('\psi')
end
function dydt = greitzer10(H,W,B,U,Ac,y,S,k)
dydt = [ ((3*H*Ac*B)/(W*U))*((y(1)-(1/3)*((y(1).^3)))-y(2)); ((W*U)/(3*H*Ac*B))*(y(1)-(S*y(2)+k)) ];
end
function y=carcomp(C0,H,x,W)
y=C0+H*(1+(3/2)*((x/W)-1)-(1/2)*(((x/W)-1).^3));
end
C0 = 0; % or a better value
cc = carcomp( C0, H, t, W );
subplot(2,2,4)
plot( t, cc )
xlabel('t')
ylabel('carcomp')
then i type in the command
type=1; [t,y] = valori( type );
but it says this:
Error: File: valori.m Line: 63 Column: 1
This statement is not inside any function.
(It follows the END that terminates the definition of the function "carcomp".)
per isakson
per isakson 2019-12-18
编辑：per isakson 2019-12-18
"This statement is not inside any function." Why did you put it at the end of the file?
Read up on function and Local Functions
Here is a screen clip of the end of your file valori.m
Comments
  • Upper left corner. With an indention of 4, I find it easier to see the scope of the functions.
  • Upper right corner. The red box shows that the Code Analyzer has spotted a syntax error. Try to understand and fix that problem before running the code. See Check Code with the Code Analyzer
  • The arrow points at the the end of the function valori.
Move the lines 61-66 to the end of the function valori.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

标签

产品


版本

R2014b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by