R=input('Please input R='); lbt8S.fx
p=0.1; K!ogpd&X&
n=chaxun(R); c"kB @P
L=15; BQWgL
c=3*10^8; Rkk`+0K7$J
h=6.626196*10^(-34); 55.2UN
k=1.3806505*10^(-23); \i,H1a
B=198.95; FEu}zt@
r=0.509*10^(-60); ws`r\k]3J
d=532*10^(-9); +Eb-|dM
for s=0:20 W f"$
for T=0.1:50:300.1 '+$r7?dKP
if mod(s,2)==0 T=pP
f=p*n*L*6*((2*h*c)/(9*k*T))*((3/2)*(s+1)*(s+2)/(2*s+3))*(64*(pi^2)/15)*((c/d-(4*s+6)*B)^4)*r*exp(-(h*c*B/(k*T))*s(s+1)); JXkx!X_{
y=diff('f','T'); k]:`<`/I_
elseif mod(s,2)==1 qh6b;ae\x
f=p*n*L*3*((2*h*c)/(9*k*T))*((3/2)*(s+1)*(s+2)/(2*s+3))*(64*(pi^2)/15)*((c/d-(4*s+6)*B)^4)*r*exp(-(h*c*B/(k*T))*s(s+1)); ] +%`WCr9
y=diff('f','T'); T7mT:z>:
end 6<\dQ+~
end 9A4n8,&sm
end |=:@<0.'
plot3(y,s,T); Xlug{ Uh
怎么错了,希望哪位大侠指点。 8iD7K@