[MATLAB数学相关] 大家帮我看看这个程序怎么回事

[sazor]

程序1：
eps = (0.1:0.1:5); %epsilon

Fai_L = acos(1-2*eps); %积分限。
Fai_L(eps>1)=pi; %epsilon 大于1积分限设为pi

syms f e

int_f = (1-(1-cos(f))/(2*e))^(3/2)*cos(f)/(2*pi); %被积函数

Jr = zeros(size(eps)); %初始化Jr

for i=1:length(eps)
Jr(i) = double(int(subs(int_f,e,eps(i)),f,-Fai_L(i),Fai_L(i))); %积分
end

plot(eps,real(Jr)); %画图
xlabel 'ε'
ylabel 'Jr'
程序1运行后可画出图形。

稍微改动下变为程序2

eps = (0.1:0.1:5); %epsilon

Fai_L = acos(1-2*eps); %积分限。
Fai_L(eps>1)=pi; %epsilon 大于1积分限设为pi

syms f e

int_f = (1-(1-cos(f))/(2*e))^(1.1)*cos(f)/(2*pi); %被积函数

Jrl = zeros(size(eps)); %初始化Jr

for i=1:length(eps)
Jrl(i) = double(int(subs(int_f,e,eps(i)),f,-Fai_L(i),Fai_L(i))); %积分
end

plot(eps,real(Jrl)); %画图
xlabel 'ε'
ylabel 'Jr'
就无法运行了。显示错误，两个的改动之处是将1中的1.5改为1.1，我的目的是想解出2中的那个积分方程，但是总是出现错误

??? Error using ==> mupadmex
Error in MuPAD command: DOUBLE cannot convert the input expression into a
double array.

If the input expression contains a symbolic variable, use the VPA function
instead.

Error in ==> sym.sym>sym.double at 927
Xstr = mupadmex('mllib::double', S.s, 0);

Error in ==> jrlimage at 13
Jrl(i) = double(int(subs(int_f,e,eps(i)),f,-Fai_L(i),Fai_L(i))); %积分