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...ar model against another variable in the data frame. Here are the lines I'm trying to execute: size <- read.table(file="/u67/abasl70/surveys/annenberg/mega/smschl.dat", header=T) sizef <- data.frame(size, row.names=size$unit) attach(sizef) mschmod <- lm (mavgres ~ crimesch + socstat + povnojob + ploinc94 + aa94 + hisp94 + minty94 + mixed94, data=sizef) plot(mschmod$residuals ~ size94) The last line gives this error message: Error in model.frame(formula, rownames, variables, varnames, extras, extranames, : variable lengths differ In fact, the lengths are different: > leng...

Hi R-helpers, I am trying to use this ifelse statement to recode a variable: > data$SOCIAL_STATUS<-ifelse(data$SOCIAL_STATUS=="B" & data$MALE>4, "C", "B") (i.e., if social status is B and there are more than 4 males, then recode social status to C; otherwise, leave it B) But, it's not working. See the below R output. Notice that there were 71

...ay to produce it using R? With best regards Hukum =================================== Hukum Chandra Division of Social Statistics School of Social Sciences University of Southampton SOUTHAMPTON SO17 1BJ, United Kingdom Email : hchandra at soton.ac.uk, hcpatwa1 at rediffmail.com Web : http://www.socstats.soton.ac.uk/