3楼: Originally posted by yz457694 at 2016-10-16 23:48:05
用cumsum
http://cn.mathworks.com/help/matlab/ref/cumsum.html

4楼: Originally posted by 取经的僧人 at 2016-10-17 10:12:01
能麻烦具体写一个吗？对这程序语言不是很懂？...

%输出1+2+...+100
i=1:100;
f=cumsum(i);
f(length(t))%取出最后一个数就是结果5050

p=     ;%常量赋值
thita1= ;
thita2= ;
omiga=  ;

i=1:p;
f=(cos(i*thita2)-cos(i*thita1)).*cos(i*omiga*t)./(i.^2)

5楼: Originally posted by 取经的僧人 at 2016-10-17 11:13:51
结果能表示成关于t的函数吗？...

p=     ;%常量赋值
thita1= ;
thita2= ;
omiga=  ;

i=1:p;
f=(cos(i*thita2)-cos(i*thita1)).*cos(i*omiga*t)./(i.^2)；
f(length(t))

7楼: Originally posted by yz457694 at 2016-10-17 16:11:50
掉了一点，补上

p=     ;%常量赋值
thita1= ;
thita2= ;
omiga=  ;

i=1:p;
f=(cos(i*thita2)-cos(i*thita1)).*cos(i*omiga*t)./(i.^2)；
f(length(t))
...

8楼: Originally posted by 取经的僧人 at 2016-10-19 17:38:52
用symsum行吗？
syms a
g1=(cos(a*theta2)-cos(a*theta1))*cos(a*t)/a^2;
s1=symsum(g1,a,1,p);

这个和cumsum有啥区别吗？...