matlab 代码实现高斯函数和Sigmoid函数交叉

题目非常简单，只是不知道为什么前段时间没有看到这个题。

u11=1/(1+exp(-05(x-685)));

u21=exp(-1/2((x-557)/6)^2);

u22=exp(-1/2((x-38)/10)^2);

u12=1/(1+exp(05(x-225)));

plot(x,[u11;u12;u21;u22],'k')

grid on

积分区间呢？

%%%==========

a1=03826;

b1=4521;

c1=9185;

a2=05569;

b2=455;

c2=1823;

a3=-003431;

b3=4979;

c3=1148;

a4=02741;

b4=5542;

c4=8593;

%积分上下限

x0=1;

x1=3;

%高斯积分点以及权系数

gx=[-09061799,-05384693,0,05384693,09061799];

gweight=[02369269,04786287,05688889,04786287,02369269];

intf=0;

for i=1:5

x=(x0+x1)/2+(x1-x0)/2gx(i);

intf=intf+gweight(i)(a1exp(-((x-b1)/c1)^2)+a2exp(-((x-b2)/c2)^2)+a3exp(-((x-b3)/c3)^2)+a4exp(-((x-b4)/c4)^2));

end

intf=intf(x1-x0)/2;

intf