only fill upper part of radial basis matrix as it is symmetric

[ChrisRackauckas]

Good catch!

[codecov[bot]]

Codecov Report

Merging #409 (b2a639e) into master (2e051e4) will increase coverage by 4.32%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #409      +/-   ##
==========================================
+ Coverage   79.82%   84.14%   +4.32%     
==========================================
  Files          16       16              
  Lines        2567     2567              
==========================================
+ Hits         2049     2160     +111     
+ Misses        518      407     -111     

Impacted Files	Coverage Δ
src/Radials.jl	84.48% <100.00%> (+1.72%)	:arrow_up:
src/Kriging.jl	96.52% <0.00%> (+0.86%)	:arrow_up:
src/GEK.jl	94.70% <0.00%> (+1.76%)	:arrow_up:
src/SecondOrderPolynomialSurrogate.jl	100.00% <0.00%> (+1.85%)	:arrow_up:
src/LinearSurrogate.jl	100.00% <0.00%> (+2.38%)	:arrow_up:
src/Lobachevsky.jl	97.52% <0.00%> (+4.13%)	:arrow_up:
src/Optimization.jl	81.30% <0.00%> (+6.20%)	:arrow_up:
src/Earth.jl	87.93% <0.00%> (+8.56%)	:arrow_up:

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ChrisRackauckas]

Well that was a journey.