HI,
May be this helps:
dat1<- read.table(text="
date1 time????????????????? date??????? timeSec topic pupilId correct
02/01/2013 14:58 02/01/2013 140323 fdp.fdp 40 TRUE
02/01/2013 14:59 02/01/2013 140372 fdp.fdp 150 TRUE
03/01/2013 11:23 03/01/2013 213833 fdp.percentage_calc_foundation 15 TRUE
03/01/2013 11:23 03/01/2013 213839 fdp.percentage_calc_foundation 57 TRUE
03/01/2013 11:24 03/01/2013 213845 fdp.percentage_calc_foundation 92 TRUE
03/01/2013 11:24 03/01/2013 213852 fdp.percentage_calc_foundation 65 TRUE
03/01/2013 11:24 03/01/2013 213855 fdp.percentage_calc_foundation 111 TRUE
03/01/2013 11:24 03/01/2013 213860 fdp.percentage_calc_foundation 34 TRUE
03/01/2013 11:24 03/01/2013 213864 fdp.percentage_calc_foundation 109 FALSE
03/01/2013 11:24 03/01/2013 213868 fdp.percentage_calc_foundation 148 FALSE
03/01/2013 11:24 03/01/2013 213877 fdp.percentage_calc_foundation 69 FALSE
03/01/2013 11:24 03/01/2013 213878 fdp.percentage_calc_foundation 61 TRUE
03/01/2013 11:24 03/01/2013 213878 fdp.percentage_calc_foundation 11 TRUE
03/01/2013 11:24 03/01/2013 213879 algebra.core.formulae 134 TRUE
03/01/2013 11:24 03/01/2013 213881 fdp.percentage_calc_foundation 63 TRUE
03/01/2013 11:24 03/01/2013 213886 fdp.percentage_calc_foundation 40 TRUE
03/01/2013 11:24 03/01/2013 213887 algebra.core.formulae 68 TRUE
03/01/2013 11:24 03/01/2013 213898 fdp.percentage_calc_foundation 109 TRUE
03/01/2013 11:24 03/01/2013 213899 algebra.core.formulae 111 TRUE
03/01/2013 11:25 03/01/2013 213901 algebra.core.formulae 101 FALSE
03/01/2013 11:25 03/01/2013 213924 fdp.percentage_calc_foundation 150 TRUE
03/01/2013 11:25 03/01/2013 213958 fdp.percentage_calc_foundation 77 TRUE
03/01/2013 11:25 03/01/2013 213959 fdp.percentage_calc_foundation 134 TRUE
03/01/2013 11:26 03/01/2013 213961 algebra.core.formulae 150 TRUE
03/01/2013 11:26 03/01/2013 214007 algebra.core.formulae 114 TRUE
03/01/2013 11:26 03/01/2013 214008 fdp.percentage_calc_foundation 55 FALSE
03/01/2013 11:26 03/01/2013 214009 fdp.percentage_calc_foundation 67 TRUE
03/01/2013 11:26 03/01/2013 214010 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:26 03/01/2013 214014 algebra.core.formulae 114 TRUE
03/01/2013 11:26 03/01/2013 214014 algebra.core.equations 55 TRUE
03/01/2013 11:26 03/01/2013 214015 algebra.core.formulae 97 TRUE
03/01/2013 11:26 03/01/2013 214015 fdp.percentage_calc_foundation 154 FALSE
03/01/2013 11:26 03/01/2013 214017 algebra.core.formulae 21 FALSE
03/01/2013 11:26 03/01/2013 214017 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:26 03/01/2013 214019 fdp.percentage_calc_foundation 149 TRUE
03/01/2013 11:26 03/01/2013 214019 fdp.percentage_calc_foundation 119 TRUE
03/01/2013 11:27 03/01/2013 214022 algebra.core.formulae 21 TRUE
03/01/2013 11:27 03/01/2013 214023 algebra.core.formulae 103 TRUE
03/01/2013 11:27 03/01/2013 214023 fdp.percentage_calc_foundation 55 TRUE
03/01/2013 11:27 03/01/2013 214024 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:27 03/01/2013 214026 algebra.core.formulae 149 TRUE
03/01/2013 11:27 03/01/2013 214026 fdp.percentage_calc_foundation 154 TRUE
03/01/2013 11:27 03/01/2013 214027 algebra.core.formulae 24 TRUE
03/01/2013 11:27 03/01/2013 214078 algebra.core.equations 67 FALSE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 119 TRUE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 55 FALSE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 149 TRUE
03/01/2013 11:28 03/01/2013 214086 algebra.core.formulae 67 FALSE
03/01/2013 11:29 03/01/2013 214169 algebra.core.formulae 92 TRUE
03/01/2013 11:29 03/01/2013 214172 algebra.core.formulae 15 TRUE
03/01/2013 11:29 03/01/2013 214172 algebra.core.equations 119 TRUE
03/01/2013 11:29 03/01/2013 214173 algebra.core.formulae 46 TRUE
03/01/2013 11:29 03/01/2013 214173 fdp.percentage_calc_foundation 146 TRUE
",sep="",header=TRUE,stringsAsFactors=FALSE)
?dat2<-
data.frame(timestamp=as.POSIXct(paste(dat1[,1],dat1[,2]),format="%m/%d/%Y
%H:%M"), dat1[,-c(1:2)])
?library(xts)
xt1<- xts(dat2[,-1],dat2[,1])
library(stringr)
##1st part
?nrow(xt1["2013-03-01 11:15/2013-03-01 11:28"])
#[1] 46
##2nd 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 responses
vec2<-with(Subxt1,tapply(as.logical(str_trim(correct)),list(pupilId),length))
vec2New<- vec2[names(vec1)]
?vec3<-sort(vec1/vec2New)
?head(vec3,3)
#101 148? 69
#? 0?? 0?? 0
?tail(vec3,3)
#150 149? 24
#? 1?? 1?? 1
A.K.
For date 03/01/2013 I need to find how many responses I have between
11.15 and 11.28. How do I go about producing another table just between
that specified period and find the number of responses? (each input is a
response)
For this range I need to count how many different topics I have.
The problem with the topic is that it is not a number, therefore I am
not sure how to investigate it??
Finally, I need to find the 3 strongest and 3 weakest pupils in that same range
on the proportion of correct responses given.
Any help would be extremely appreciated!!!
Table I have:
timestamp ? ? ? ? ? ? ? ? ? date ? ? ? ?timeSec topic pupilId correct
02/01/2013 14:58 02/01/2013 140323 fdp.fdp 40 TRUE
02/01/2013 14:59 02/01/2013 140372 fdp.fdp 150 TRUE
03/01/2013 11:23 03/01/2013 213833 fdp.percentage_calc_foundation 15 TRUE
03/01/2013 11:23 03/01/2013 213839 fdp.percentage_calc_foundation 57 TRUE
03/01/2013 11:24 03/01/2013 213845 fdp.percentage_calc_foundation 92 TRUE
03/01/2013 11:24 03/01/2013 213852 fdp.percentage_calc_foundation 65 TRUE
03/01/2013 11:24 03/01/2013 213855 fdp.percentage_calc_foundation 111 TRUE
03/01/2013 11:24 03/01/2013 213860 fdp.percentage_calc_foundation 34 TRUE
03/01/2013 11:24 03/01/2013 213864 fdp.percentage_calc_foundation 109 FALSE
03/01/2013 11:24 03/01/2013 213868 fdp.percentage_calc_foundation 148 FALSE
03/01/2013 11:24 03/01/2013 213877 fdp.percentage_calc_foundation 69 FALSE
03/01/2013 11:24 03/01/2013 213878 fdp.percentage_calc_foundation 61 TRUE
03/01/2013 11:24 03/01/2013 213878 fdp.percentage_calc_foundation 11 TRUE
03/01/2013 11:24 03/01/2013 213879 algebra.core.formulae 134 TRUE
03/01/2013 11:24 03/01/2013 213881 fdp.percentage_calc_foundation 63 TRUE
03/01/2013 11:24 03/01/2013 213886 fdp.percentage_calc_foundation 40 TRUE
03/01/2013 11:24 03/01/2013 213887 algebra.core.formulae 68 TRUE
03/01/2013 11:24 03/01/2013 213898 fdp.percentage_calc_foundation 109 TRUE
03/01/2013 11:24 03/01/2013 213899 algebra.core.formulae 111 TRUE
03/01/2013 11:25 03/01/2013 213901 algebra.core.formulae 101 FALSE
03/01/2013 11:25 03/01/2013 213924 fdp.percentage_calc_foundation 150 TRUE
03/01/2013 11:25 03/01/2013 213958 fdp.percentage_calc_foundation 77 TRUE
03/01/2013 11:25 03/01/2013 213959 fdp.percentage_calc_foundation 134 TRUE
03/01/2013 11:26 03/01/2013 213961 algebra.core.formulae 150 TRUE
03/01/2013 11:26 03/01/2013 214007 algebra.core.formulae 114 TRUE
03/01/2013 11:26 03/01/2013 214008 fdp.percentage_calc_foundation 55 FALSE
03/01/2013 11:26 03/01/2013 214009 fdp.percentage_calc_foundation 67 TRUE
03/01/2013 11:26 03/01/2013 214010 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:26 03/01/2013 214014 algebra.core.formulae 114 TRUE
03/01/2013 11:26 03/01/2013 214014 algebra.core.equations 55 TRUE
03/01/2013 11:26 03/01/2013 214015 algebra.core.formulae 97 TRUE
03/01/2013 11:26 03/01/2013 214015 fdp.percentage_calc_foundation 154 FALSE
03/01/2013 11:26 03/01/2013 214017 algebra.core.formulae 21 FALSE
03/01/2013 11:26 03/01/2013 214017 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:26 03/01/2013 214019 fdp.percentage_calc_foundation 149 TRUE
03/01/2013 11:26 03/01/2013 214019 fdp.percentage_calc_foundation 119 TRUE
03/01/2013 11:27 03/01/2013 214022 algebra.core.formulae 21 TRUE
03/01/2013 11:27 03/01/2013 214023 algebra.core.formulae 103 TRUE
03/01/2013 11:27 03/01/2013 214023 fdp.percentage_calc_foundation 55 TRUE
03/01/2013 11:27 03/01/2013 214024 fdp.percentage_calc_foundation 24 TRUE
03/01/2013 11:27 03/01/2013 214026 algebra.core.formulae 149 TRUE
03/01/2013 11:27 03/01/2013 214026 fdp.percentage_calc_foundation 154 TRUE
03/01/2013 11:27 03/01/2013 214027 algebra.core.formulae 24 TRUE
03/01/2013 11:27 03/01/2013 214078 algebra.core.equations 67 FALSE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 119 TRUE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 55 FALSE
03/01/2013 11:28 03/01/2013 214085 fdp.percentage_calc_foundation 149 TRUE
03/01/2013 11:28 03/01/2013 214086 algebra.core.formulae 67 FALSE
03/01/2013 11:29 03/01/2013 214169 algebra.core.formulae 92 TRUE
03/01/2013 11:29 03/01/2013 214172 algebra.core.formulae 15 TRUE
03/01/2013 11:29 03/01/2013 214172 algebra.core.equations 119 TRUE
03/01/2013 11:29 03/01/2013 214173 algebra.core.formulae 46 TRUE
03/01/2013 11:29 03/01/2013 214173 fdp.percentage_calc_foundation 146 TRUE
