6楼: Originally posted by dbb627 at 2012-07-30 22:59:15
能给下参数吗，有可能alpha值不合适，你可以看下这个例子随t的改变 alpha是收敛的
function yan
global s phi lam alpha
s=3.2;
phi=1;
lam=3;
alpha=0.6;
%=fsolve(@sumt,10)
t=0.1:1:10000;
for i=1:len ...

function yan
global s phi lam alpha
s=3.2;
phi=1;
lam=3;
alpha=0.6;
[X,FVAL,EXITFLAG,OUTPUT]=fsolve(@sumt,10)

function y=sumt(t)
global s phi lam alpha
y=0;
for N=0:floor(s*t-phi)
    y=y+exp(-lam*t)*(lam*t)^N/gamma(N+1);
end
y=y-alpha;