NMSE example 3.10
pf,          0
pd,       7081
test,         time,            max,            avg
if,         719334,              0,           -nan
id,     2.2982e+06,             63,        44.8311
of,          79099,              0,           -nan
od,         249783,        61.9986,        8.00943
df,             31,           7081
dd,        52.5506,            766