coerce - w3toppers.com

In Ruby, how does coerce() actually work?

Short answer: check out how Matrix is doing it. The idea is that coerce returns [equivalent_something, equivalent_self], where equivalent_something is an object basically equivalent to something but that knows how to do operations on your Point class. In the Matrix lib, we construct a Matrix::Scalar from any Numeric object, and that class knows how to … Read more

Converting a data frame to xts

This is clearly documented — xts and zoo objects are formed by supplying two arguments, a vector or matrix carrying data and Date, POSIXct, chron, … type supplying the time information (or in the case of zoo the ordering). So do something like qxts <- xts(q[,-1], order.by=q[,1]) and you should be set.