这个matlab怎么定义函数

这个matlab怎么定义函数
function[rcs]=rcs_cylinder(r1,r2,h,freq,phi,CylinderType)
%rcs_culinder.m
%This program computes monostatic RCS for a finite length
%cylinder of either curricular or elliptical cross-section.
%Plot of RCS versus aspect angle theta is generated at a specified
%input angle phi
%Last modified on July 16,2003
r=r1; %radius of the circular cylinder
eps=0.00001;
dtr=pi/180;
phir=phi*dtr;
freqGH=num2str(freq*1.e-9);
lambda=3.0e+8/freq; %wavelength
%CylinderType='Elliptic';%'Elliptic'or'Circular'
switch CylinderType
case'Circular'
%Compute RCS from 0 to (90-.5) degrees
index=0;
for theta=0.0:.1:90-.5
index=index+1;thetar=theta*dtr;
rcs(index)=(lambda*r*sin(thetar)/...
(8.*pi*(cos(thetar))^2))+eps;
end
%Compute RCS for broadside specular at 90 degree
thetar=pi/2;
index=index+1;
rcs(index)=(2.*pi*h^2*r/lambda)+eps;
%Compute RCS from (90+.5) to 180 degrees
for theta=90+.5:.1:180.
index=index+1;
thetar=theta*dtr;
rcs(index)=(lambda*r*sin(thetar)/...
(8.*pi*(cos(thetar))^2))+eps;
end
case'Elliptic'
r12=r1*r1;
r22=r2*r2;
h2=h*h;
%Compute RCS from 0 to (90-.5)degrees
index=0;
index=0;
for theta=0.0:.1:90-.5
index=index+1;thetar=theta*dtr;
rcs(index)=lambda*r12*r12*sin(thetar)/...
(8*pi*(cos(thetar)^2)*((r12*cos(phir)^2+r22*sin(phir)^2)^1.5))+eps;
end
%Compute RCS for broadside specular at 90 degree
index=index+1;
rcs(index)=2*pi*h2*r12*r22/...
(lambda*((r12*cos(phir)^2+r22*sin(phir)^2)^1.5))+eps;
%Compute RCS from(90+.5)to 180 degrees
for theta=90+.5:.1:180.
index=index+1;
thetar=theta*dtr;
rcs(index)=lambda*r12*r22*sin(thetar)/...
(8*pi*cos(thetar)^2*((r12*cos(phir)^2+r22*sin(phir)^2)^1.5))+eps;
end
end
%Plot the results
delta=180/(index-1);
angle=0:delta:180;
plot(angle,10*log10(rcs),'k','linewidth',1.5);
grid;
xlable('Aspect angle,Theta[Degrees]');
ylable('RCS-dBsm');
title([[CylinderType],'Cylinder','at Frequency=',[freqGH],'GHz']);
这个运行不了.

删掉重复的语句:  " index=0;"
改动两处写错的语句：
“           xlable('Aspect angle,Theta[Degrees]');  
           ylable('RCS-dBsm');”
改为：
“           xlabel('Aspect angle,Theta[Degrees]');  
           ylabel('RCS-dBsm');”
输入命令为rcs_cylinder(1,2,3,4,5,'Circular')
得到的图形为：