Nothing
.reg1fitBasic <-
function(lm.out, TotSS, sy, digits_d=3, show_R=FALSE) {
nm <- all.vars(lm.out$terms) # names of vars in the model
n.vars <- length(nm)
n.pred <- n.vars - 1L
n.obs <- nrow(lm.out$model)
tx <- character(length = 0)
# model fit
sm <- summary(lm.out)
if (is.null(options()$knitr.in.progress)) {
tx[length(tx)+1] <- "-- Model Fit"
tx[length(tx)+1] <- ""
}
if (!is.null(sy)) { # assigned NULL in reg.zKfold.R)
tx[length(tx)+1] <- paste("Standard deviation of ", nm[1], ": ",
.fmt_cm(sy,digits_d), sep="")
tx[length(tx)+1] <- ""
}
se <- sm$sigma
tx[length(tx)+1] <- paste("Standard deviation of residuals: ",
.fmt_cm(se,digits_d),
"for", sm$df[2], "degrees of freedom")
tcut <- -qt(0.025, df=sm$df[2])
range <- 2*tcut*se
tx[length(tx)+1] <- paste("95% range of residual variation: ",
.fmt_cm(range,digits_d),
" = 2 * (", .fmt(tcut,3), " * ", .fmt_cm(se,digits_d), ")", sep="")
# predicted residual sum of squares
prs.terms <- residuals(lm.out)/(1 - lm.influence(lm.out)$hat)
PRESS <- sum(prs.terms^2)
RsqPRESS <- 1 - (PRESS / TotSS)
if (n.pred > 0) {
pvl <- 1-pf(sm$fstatistic[1],sm$fstatistic[2],sm$fstatistic[3])
tx[length(tx)+1] <- ""
tx[length(tx)+1] <- paste("R-squared: ", .fmt(sm$r.squared,3),
" Adjusted R-squared: ", .fmt(sm$adj.r.squared,3),
" PRESS R-squared: ", .fmt(RsqPRESS,3))
tx[length(tx)+1] <- paste("\n",
"Null hypothesis of all 0 population slope coefficients:\n",
" F-statistic: ", .fmt(sm$fstatistic[1],3),
" df: ", sm$fstatistic[2], " and ", sm$fstatistic[3],
" p-value:", .fmt(pvl, 3, 7), sep="")
}
return(list(out_fit=tx, se=sm$sigma, range=range, Rsq=sm$r.squared,
Rsqadj=sm$adj.r.squared, PRESS=PRESS, RsqPRESS=RsqPRESS))
}
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