[R] Matlab inv() and R solve() differences

Joseph P Gray jpgray at uwm.edu
Fri Jan 30 03:00:54 CET 2009


I submit the following matrix to both MATLAB and R

x=  0.133 0.254 -0.214 0.116
    0.254 0.623 -0.674 0.139
   -0.214 -0.674 0.910 0.011
    0.116 0.139  0.011 0.180

MATLAB's inv(x) provides the following
 137.21 -50.68 -4.70 -46.42
-120.71  27.28 -8.94 62.19
-58.15   6.93  -7.89  36.94
  8.35   11.17 10.42 -14.82

R's solve(x) provides:
261.94 116.22 150.92 -267.78
116.22 344.30 286.68 -358.30
150.92 286.68 252.96 -334.09
-267.78 =358.30 -334.09 475.22

inv(x)*x = I(4)
and solve(x)%*%x = I(4)

Is there a way to obtain the MATLAB result in R?

Thanks for any help.


Pat Gray




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