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non-symmetric LD matrix #10

@sarahgra

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@sarahgra

I'm calculating an LD matrix from UK Biobank data. When I use this as input into another program in R it gives an error: isSymmetric = FALSE
I've checked the values to identify which ones are causing the problems and it seems to be that the values are pretty close. Should I expect that the output matrix will be symmetric, or is this not the case due to rounding or approximation somewhere in the emeraLD code?
Example 1:

temp[1919,1064]
V1064
-0.02305
temp[1064,1919]
V1919
-0.02601

Example 2:

temp[648,650]
V650
1
temp[650,648]
V648
0.92538

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