wrong variable name

[MarcYin]

No description provided.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@d776820). Click here to learn what that means.
The diff coverage is 100%.

@@          Coverage Diff           @@
##             master   #14   +/-   ##
======================================
  Coverage          ?   55%           
======================================
  Files             ?     8           
  Lines             ?   600           
  Branches          ?     0           
======================================
  Hits              ?   330           
  Misses            ?   270           
  Partials          ?     0

Impacted Files	Coverage Δ
gp_emulator/GaussianProcess.py	63.26% <100%> (ø)

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