search for: twosam

...R console editor without breaking the continuity of my code more clearly : if for example I write a function, so far i have to write the all code inside on the same line wich may become obscure as the function is more and more complex. I would like to do like in the example of the manuels: >twosam <- function(y1, y2) { n1 <- length(y1); n2 <- length(y2) yb1 <- mean(y1); yb2 <- mean(y2) s1 <- var(y1); s2 <- var(y2) s <- ((n1-1)*s1 + (n2-1)*s2)/(n1+n2-2) tst <- (yb1 - yb2)/sqrt(s2*(1/n1 + 1/n2)) tst } all I can do is something like t...

...e following is what I typed and the last line is R's response when I hit the return key after the penultimate line. I've re-checked and re-typed the code many times to no avail. I wasn't able to find this issue using search options, either. Any help is GREATLY appreciated! > twosam<-function(y1, y2) { + n1<-length(y1);n2 <-length(y2) + yb1<-mean(y1); yb2<-mean(y2) + s1<-var(y1);s2<-var(y2) + s<-((n1-1)*s1 + (n2-1)*s2)/(n1+n2-2) + tst<-(yb1-yb2)/sqrt(s*(1/n1+1/n2)) Error: syntax error David [[alternative text/enriched version deleted]]

...cording to the classes specified by a factor. It can also split data frames. This is a useful function, often used in combination with lapply to avoid for() loops. See help(split) and help(lapply) for further details.) -------------------------------------------------- Section 10.1 The current twosam is for a pooled-variance t-statistic. Give the unpooled version instead (for consistency with t.test, and because it is better statistical practice). Give initial comments in functions twosam: # compute a two-sample t-statistic for the difference in means and bslash: # Compute least-squares regr...