what is the meaning of $r2 which of the following is an exotic loss function? what is the definition for the loss function of the ols regression what is the meaning of $r2? what is the definition for ols what is a $r$-like mean what is the simplest way to calculate r-like value? ss regression how to define what is the general function of r2$ what is $r2 why is it useful to a measure r2 when estimating the residual sum of squares, one can use the function what is the measure for the residual sum of squares in a regression where is the function to calculate r2 what is r2? what is the function of r2 in regression analysis what is the r-like function what function describes the residual in regression what is the formula for an exotic function in regression which ols-like measure is the least absolute deviation in a regression