求matlab代码解方程!x=[2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014];y=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12];z=100-100*(y-1)/351p1=polyfit(x,z,1);f=poly2str(p1,'z')k=p1(1)S= A1*a+A2*b+A3*(1+t/100)*ca=1/100*(-20000+200*t)/(100+t
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![求matlab代码解方程!x=[2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014];y=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12];z=100-100*(y-1)/351p1=polyfit(x,z,1);f=poly2str(p1,'z')k=p1(1)S= A1*a+A2*b+A3*(1+t/100)*ca=1/100*(-20000+200*t)/(100+t](/uploads/image/z/1633473-9-3.jpg?t=%E6%B1%82matlab%E4%BB%A3%E7%A0%81%E8%A7%A3%E6%96%B9%E7%A8%8B%21x%3D%5B2003+2004+2005+2006+2007+2008+2009+2010+2011+2012+2013+2014%5D%3By%3D%5Bx1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11+x12%5D%3Bz%3D100-100%2A%28y-1%29%2F351p1%3Dpolyfit%28x%2Cz%2C1%29%3Bf%3Dpoly2str%28p1%2C%27z%27%29k%3Dp1%281%29S%3D+A1%2Aa%2BA2%2Ab%2BA3%2A%281%2Bt%2F100%29%2Aca%3D1%2F100%2A%28-20000%2B200%2At%29%2F%28100%2Bt)
求matlab代码解方程!x=[2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014];y=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12];z=100-100*(y-1)/351p1=polyfit(x,z,1);f=poly2str(p1,'z')k=p1(1)S= A1*a+A2*b+A3*(1+t/100)*ca=1/100*(-20000+200*t)/(100+t
求matlab代码解方程!
x=[2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014];
y=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12];
z=100-100*(y-1)/351
p1=polyfit(x,z,1);
f=poly2str(p1,'z')
k=p1(1)
S= A1*a+A2*b+A3*(1+t/100)*c
a=1/100*(-20000+200*t)/(100+t)
b=1/100*(-10000+t^2)/(100+t)
c= 1-1/100*t
A1=k*20%+100x13*30%+B3*50%
B3=x14*10+x15*9+x16*8+x17*7+x18*6+x19*5+x20*4+x21*3+x22*2+x23*1
A2=x24*5+x25*2
A3=x26
sym S
t=20 x1=15 x2=29 x3=10 x4=1 x5=1 x6=44 x7=42 x8=33,x9=16,x10=16,x11=11,x12=25,x13=72.1,x14=2,x15=1,x16=0,x17=0,x18=1,x19=0,x20=0,x21=0,x22=0 ,x23=0,x24=20,x25=0,x26=10.55
代码瞎写的.但是值都是对的,求规范代码算出S!
求matlab代码解方程!x=[2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014];y=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12];z=100-100*(y-1)/351p1=polyfit(x,z,1);f=poly2str(p1,'z')k=p1(1)S= A1*a+A2*b+A3*(1+t/100)*ca=1/100*(-20000+200*t)/(100+t
你把太多无关的部分混进来了.
从代码上看,S = f(A1,a,A2,b,A3,t,c)
而A1 = f(k),k已知;a = f(t),已知;……其他的也都已知,根本不需要方程啊,直接求出来了.