finding out Mahalanobis distance

I have two matrix.

I want to have result matrix which has a size of 8*1. Moreover, the G2 matrix elements should be compared with G1 and the nearest elements( Using Mahalanobis distance, matlab function mahal) of G2 to G1 should be filled up in desired matrix. for example first one of G2 row has NaN, so it keep it NaN. 4th row of G2 has two values, this values should be compared with 4th element of G1 and nearest value (Using Mahalnobis distance, matlab function mahal) shoud be filled up in the result matrix. When there is a single value than it should be remain like this only. When there are more than two values than the nearest value should be filled up in the matrix.

G1 =
   80.00
   79.43
   78.89
   78.38
   77.90
   77.45
   77.03
   76.63

G2 =     NaN       NaN       NaN
         NaN       NaN       NaN
         NaN       79.11     NaN
         NaN       78.64     NaN
         NaN       78.13     78.14
         77.46     NaN       77.66
         77.07     77.08     NaN
         76.74     NaN       NaN

Answer 1

[VM Sreeram]

This seems to be a duplicate of this question.

See this answer for that question.