x =

<
   <7.589183e+00,1.703609e+00,-4.477162e+00>,
   <-4.597851e+00,9.434889e+00,-6.543450e+00>,
   <4.588202e-01,-6.115153e+00,1.331191e+00>>

y = <1.745005e+00,-4.448092e+00,-4.160842e+00>

#cast %eL

example = regression_coefficients(x,y)