#' summary FM.attribution object.
#'
#' Generic function of summary method for \code{factorModelPerformanceAttribution}.
#'
#'
#' @param fm.attr FM.attribution object created by
#' \code{factorModelPerformanceAttribution}.
#' @param digits integer indicating the number of decimal places. Default is 3.
#' @param ... Other arguments for \code{print} methods.
#' @author Yi-An Chen.
#' @examples
#' # load data from the database
#' data(managers.df)
#' # fit the factor model with OLS
#' fit.ts <- fitTimeSeriesFactorModel(assets.names=colnames(managers.df[,(1:6)]),
#' factors.names=c("EDHEC.LS.EQ","SP500.TR"),
#' data=managers.df,fit.method="OLS")
#'
#' fm.attr <- factorModelPerformanceAttribution(fit.ts)
#' summary(fm.attr)
#' @method summary FM.attribution
#' @export
#'
summary.FM.attribution <- function(fm.attr,digits = max(3, .Options$digits - 3),...) {
# n <- dim(fm.attr[[1]])[1]
# k <- dim(fm.attr[[1]])[2]+1
# table.mat <- matrix(rep(NA,n*k*2),ncol=n)
cat("\nMean of returns attributed to factors
\n")
print(sapply(fm.attr[[3]],function(x) apply(x,2,mean)),digits = digits,...)
cat("\nStandard Deviation of returns attributed to factors
\n")
print(sapply(fm.attr[[3]],function(x) apply(x,2,sd)),digits = digits,...)
}
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