Question

关于用matlab求解函数

Y1=(-1.24E-10)*X1+(1.96E-10)*X2+(-2.59E-14)*X3+(3.46E-10)
Y2=(4.67E+5)*X1+(-6.82E+5)*X2+(-1.62E+4)*X3+(-6.92E+5)
Y3=(5.37E+4)*X1+(-8.37E+4)*X2+(-3.22E+3)*X3+(-4.28E+3)

SPSS求出一个Y（X）方程组，
类似：
Y1=a1*X1+b1*X2+c1*X3+d1(常数）
Y2=a2*X1+b2*X2+c2*X3+d2(常数）
Y3=a3*X1+b3*X2+c3*X3+d3(常数）

求解一个X(Y)的方程组，
类似：
X1=e1*Y1+f1*Y2+g1*Y3+h1(常数)
X2=e2*Y1+f2*Y2+g2*Y3+h2
X3=e3*Y1+f3*Y2+g3*Y3=h3

Answer 1

[X1,X2,X3]=solve('Y1=(-1.24E-10)*X1+(1.96E-10)*X2+(-2.59E-14)*X3+(3.46E-10)','Y2=(4.67E+5)*X1+(-6.82E+5)*X2+(-1.62E+4)*X3+(-6.92E+5)',...
'Y3=(5.37E+4)*X1+(-8.37E+4)*X2+(-3.22E+3)*X3+(-4.28E+3)','X1','X2','X3')

X1 =

41762297261.004497684085252244238*Y1 + 0.000031481436267392550837512647219088*Y2 - 0.00015872077982323581989370269968396*Y3 + 6.6560741070846396717202070444555

X2 =

31506896802.790918500384755234375*Y1 + 0.000019917788723096534603994186177191*Y2 - 0.0001004609335221602935943682550407*Y3 + 2.4517507071422980882469553919484

X3 =

0.0000072777054148447309379241529919729*Y2 - 122513012260.14234560460433776446*Y1 - 0.00034618811823072886783950684041052*Y3 + 45.943989243054285833883525459992