[交流] 请各位给指点个累加的分段函数 已有2人参与

clc;
clear all;
x=0:0.1:100
m=10;
sum=0;
s=[];
for i=1:m;
a(i)=2*i;
a(m)=2*m
if i+1<m & x-a(i)>0 & i-a(i+1)<0;
sum=sum+(x-a(i));
else if x-a(m)>=0;
sum=sum+(x-a(i));
end
end
s = [s sum];
end
plot(x,s);