Displaying 1 result from an estimated 1 matches for "subxt1".
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subst1
2013 Jun 28
0
Help with tables
...nd part
table(xt1["2013-03-01 11:15/2013-03-01 11:28","topic"])
#
#??????? algebra.core.equations????????? algebra.core.formulae
#???????????????????????????? 2???????????????????????????? 14
#fdp.percentage_calc_foundation
#??????????????????????????? 30
###3rd question
Subxt1<-xt1["2013-03-01 11:15/2013-03-01 11:28"]
#Based on number of correct responses
vec1<-sort(with(Subxt1,tapply(as.logical(str_trim(correct)),list(pupilId),sum)))
head(vec1,3)
#101 148? 69
#? 0?? 0?? 0
?tail(vec1,3)
# 55 149? 24
#? 2?? 3?? 4
#Based on proportion of correct respon...