search

boostorg / accumulators

An awesome library from Boost
http://boost.org/libs/accumulators
22 stars 54 forks source link

issue with rolling mean #16

Open ghost opened 5 years ago

ghost commented 5 years ago

Hi All, This is reiteration of the old stackoverflow question. Rolling mean seems not working correctly with unsigned integers. My system: Mac OS, High Sierra, the latest brew updates.

// g++ -std=c++11 -o accum_test accum_test.cpp Sample file is attached. accum_test.txt

OUTPUT:

Signed integers 9 actualMean: 9.0000000000000000 8 actualMean: 8.5000000000000000 7 actualMean: 8.0000000000000000 5 actualMean: 7.2500000000000000 6 actualMean: 7.0000000000000000 4 actualMean: 6.0000000000000000 3 actualMean: 5.0000000000000000 2 actualMean: 4.0000000000000000 1 actualMean: 3.2000000000000002 0 actualMean: 2.0000000000000000 0 actualMean: 1.2000000000000000 0 actualMean: 0.6000000000000000 0 actualMean: 0.2000000000000000 0 actualMean: -0.0000000000000001 0 actualMean: -0.0000000000000001 0 actualMean: -0.0000000000000001

Unsigned integers 9 actualMean: 9.0000000000000000 8 actualMean: 8.5000000000000000 7 actualMean: 8.0000000000000000 5 actualMean: 7.2500000000000000 6 actualMean: 7.0000000000000000 4 actualMean: 858993465.2000000476837158 3 actualMean: 1717986923.4000000953674316 2 actualMean: 2576980381.6000003814697266 1 actualMean: 3435973840.0000004768371582 0 actualMean: 4294967298.0000000000000000 0 actualMean: 5153960756.3999996185302734 0 actualMean: 6012954215.0000000000000000 0 actualMean: 6871947673.8000001907348633 0 actualMean: 7730941132.8000001907348633 0 actualMean: 7730941132.8000001907348633 0 actualMean: 7730941132.8000001907348633