subtract 10%iles -0.000556946    0.0287161    0.0556641    0.0844359
     0.117332     0.157326     0.210336     0.290215     0.453304
diff 10%iles    -0.184834   -0.0935354   -0.0513659   -0.0229342  0.000755310
    0.0244904    0.0528932    0.0948105     0.184999
stardiff 10%iles   -0.0434319   -0.0224007   -0.0113630  -0.00324133
   0.00382714    0.0108028    0.0185847    0.0287969    0.0472338
stardiff contour -excluded 0.005   -0.0434319    0.0472338