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

4Â¥: Originally posted by È¡¾­µÄÉ®ÈË at 2016-10-17 10:12:01
ÄÜÂé·³¾ßÌåдһ¸öÂ𣿶ÔÕâ³ÌÐòÓïÑÔ²»ÊǺܶ®£¿...

%Êä³ö1+2+...+100
i=1:100;
f=cumsum(i);
f(length(t))%È¡³ö×îºóÒ»¸öÊý¾ÍÊǽá¹û5050

p=     ;%³£Á¿¸³Öµ
thita1= ;
thita2= ;
omiga=  ;

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

5Â¥: Originally posted by È¡¾­µÄÉ®ÈË at 2016-10-17 11:13:51
½á¹ûÄܱíʾ³É¹ØÓÚtµÄº¯ÊýÂð£¿...

p=     ;%³£Á¿¸³Öµ
thita1= ;
thita2= ;
omiga=  ;

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

7Â¥: Originally posted by yz457694 at 2016-10-17 16:11:50
µôÁËÒ»µã£¬²¹ÉÏ

p=     ;%³£Á¿¸³Öµ
thita1= ;
thita2= ;
omiga=  ;

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

8Â¥: Originally posted by È¡¾­µÄÉ®ÈË at 2016-10-19 17:38:52
ÓÃsymsumÐÐÂð£¿
syms a
g1=(cos(a*theta2)-cos(a*theta1))*cos(a*t)/a^2;
s1=symsum(g1,a,1,p);

Õâ¸öºÍcumsumÓÐɶÇø±ðÂð£¿...