RT   我的m文件的代码是function  h_vs= fcn(T_s)

B13=  [-575.520*10^-4  117.700*10^-5   491.369*10^-8      782.701*10^-2   -815.233*10^-3      256.383*10^-4     149.856*10^-1   -209.283*10^-2];

a=zeros(1,8);

for i=1:8

a(i)=B13(i);

end

coder.extrinsic('syms');

syms  h_vs u v;

T_s=T_s+273.15-61;

v=T_s-203.15;

u=(h_vs-350)^0.5-2.24076;

x=solve(u^3+a(1)*u^2*v+a(2)*u*v^2+a(3)*v^3+a(4)*u^2+a(5)*u*v+a(6)*v^2+a(7)*u+a(8)*v,h_vs);

y=max (real (double (subs(x))));

h_vs=y;

end

复制到matlab function中想要调用却出现如下8个错误：

Simulink does not have enough information to determine output sizes for this block. If you think the errors below are inaccurate, try specifying types for the block inputs and/or sizes for the block outputs.

Component: MATLAB Function | Category: Coder error

Undefined function or variable 'h_vs'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#71.303.307), line 12, column 4:

"h_vs"

Launch diagnostic report.

Component: MATLAB Function | Category: Coder error

Undefined function or variable 'u'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#71.334.335), line 13, column 9:

"u"

Launch diagnostic report.

Component: MATLAB Function | Category: Coder error

Undefined function or variable 'x'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#71.443.444), line 14, column 27:

"x"

Launch diagnostic report.

Component: MATLAB Function | Category: Coder error

Undefined function or variable 'y'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#71.455.456), line 15, column 6:

"y"

Launch diagnostic report.

Component: MATLAB Function | Category: Coder error

Errors occurred during parsing of MATLAB function 'MATLAB Function'

Component: MATLAB Function | Category: Coder error

Errors occurred during parsing of MATLAB function 'MATLAB Function'

Component: Simulink | Category: Block error

Error occurred in 'sim_hvs/MATLAB Function'.

Component: Simulink | Category: Block error

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求大神解决

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