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edit approved Sep 11, 2022 at 1:18
Urb
edit approved Sep 11, 2022 at 1:18
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Tim
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I have two vectors. I want to evaluate Mahalanobis distance between them. None of software packages are able to evaluate the distance producing a warning that the number of rows should be greater than than number of columns, so as to obtain inverse of covariance matrix. Can a covariance matrix be set up manually to evaluate Mahalanobis distance? For a simple example.

v1 = [172.14 193.43 155.99 106.92 127.37 142.18 110.03 56.92 36.27 0.48 2.53 3.05 2.18 0.17 0.10 1.61 80.70 89.70] v2 = [170.61 192.41 156.66 106.50 125.50 142.43 110.18 57.02 35.94 0.42 2.54 2.94 2.16 0.12 0.16 1.61 81.50 88.20]

v1 = [172.14    193.43  155.99  106.92  127.37  142.18
      110.03    56.92   36.27   0.48    2.53    3.05
      2.18  0.17    0.10    1.61    80.70   89.70]
v2 = [170.61    192.41  156.66  106.50  125.50  142.43
      110.18    57.02   35.94   0.42    2.54    2.94
      2.16  0.12    0.16    1.61    81.50   88.20]

I have two vectors. I want to evaluate Mahalanobis distance between them. None of software packages are able to evaluate the distance producing a warning that the number of rows should be greater than than number of columns, so as to obtain inverse of covariance matrix. Can a covariance matrix be set up manually to evaluate Mahalanobis distance? For a simple example.

v1 = [172.14 193.43 155.99 106.92 127.37 142.18 110.03 56.92 36.27 0.48 2.53 3.05 2.18 0.17 0.10 1.61 80.70 89.70] v2 = [170.61 192.41 156.66 106.50 125.50 142.43 110.18 57.02 35.94 0.42 2.54 2.94 2.16 0.12 0.16 1.61 81.50 88.20]

I have two vectors. I want to evaluate Mahalanobis distance between them. None of software packages are able to evaluate the distance producing a warning that the number of rows should be greater than than number of columns, so as to obtain inverse of covariance matrix. Can a covariance matrix be set up manually to evaluate Mahalanobis distance? For a simple example.

v1 = [172.14    193.43  155.99  106.92  127.37  142.18
      110.03    56.92   36.27   0.48    2.53    3.05
      2.18  0.17    0.10    1.61    80.70   89.70]
v2 = [170.61    192.41  156.66  106.50  125.50  142.43
      110.18    57.02   35.94   0.42    2.54    2.94
      2.16  0.12    0.16    1.61    81.50   88.20]
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Student123
Student123
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Mahalanobis distance

I have two vectors. I want to evaluate Mahalanobis distance between them. None of software packages are able to evaluate the distance producing a warning that the number of rows should be greater than than number of columns, so as to obtain inverse of covariance matrix. Can a covariance matrix be set up manually to evaluate Mahalanobis distance? For a simple example.

v1 = [172.14 193.43 155.99 106.92 127.37 142.18 110.03 56.92 36.27 0.48 2.53 3.05 2.18 0.17 0.10 1.61 80.70 89.70] v2 = [170.61 192.41 156.66 106.50 125.50 142.43 110.18 57.02 35.94 0.42 2.54 2.94 2.16 0.12 0.16 1.61 81.50 88.20]