🔨 Lookback-functions#71
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## devel #71 +/- ##
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- Coverage 96.67% 96.17% -0.51%
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Lines 21012 24225 +3213
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* The lookback function is a utility/helper function
for downstream packages that wants to implement their
own wrapper based on {talib} - the function gives a higher
degree of freedom in the way the indicators are called and can
be used in any custom control flows.
* The unit-test tests whether the lookback is equal between the lookback() and attribute. This is mainly to test the lookback() and not the the indicators. They are calculated the same way.
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* The function returns the max(MA1, MA2, ..., MAk) when passed - otherwise zero. * The ta_VOLUME.c has gotten some love and refactoring but the underlying logic is the same.
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📚 What?
This PR introduces unexported lookback-functions for calculating lookback-periods independently of the indicator functions. The goal is to provide an input validation step for downstream wrappers like {ledgr}, and similar packages that may or may not use different control-flows.
📋 TODO
talib::lookback(FUN, ...)similar toindicator()When returning as
as.double(x)the attributes gets stripped. So all numeric methods are broken - and all rolling-functions.This PR closes #70