SLOPE rounding error

[michbur]

Rounding errors in SLOPE depend on the OS (https://github.com/BioGenies/SLOPE/blob/master/src/SLOPE.cpp#L23).

[KrystynaGrzesiak]

We tested trainSLOPE and it turned out that the results slightly differ between operating systems.

All the operating systems encounter differences between the expected and obtained values. It can be seen in the check that the obtained differences vary depending on OS (even in order of magnitude). Hence Windows fails one test while ubuntu and macOS fail two of them.

The differences probably come from rounding in cpp. It may be fixed temporarily by additional tolerance in expect_equal.