r - How to reflow long to wide only part and summarise the rest? -


i need arrange table performing formatting, table like

dt <- read.table(text =  "year   st_id    n   overall  metric1  metric2 1999    205    386     96.3        0       0     1999    205     15        0        0       0 1999    205      0        0        0       0   1999    205      0        0        0      na 2000    205    440      100        0       0 2000    205      0        0        0       0 2000    205      0        0       na       0 2000    205      0        0        0      na", header = true)

i need obtain following "output" table.

year   st_id    1   2  3  4  overall  metric1  metric2 1999    205   386  15  0  0     96.3        0      na     2000    205   440   0  0  0      100       na      na  .  .

in columns on right, want aggregate instances of na => na else sum(values)

how can achieve using r?

 library(tidyr)     a=aggregate(.~year,xy[-(2:3)],sum,na.action=function(x)x)  xy[1:3]%>%group_by(year)%>%mutate(n_=1:4)%>%spread(n_,n,sep="")%>%merge(a,by="year")   year st_id n_1 n_2 n_3 n_4 overall metric1 metric2 1 1999   205 386  15   0   0    96.3       0      na 2 2000   205 440   0   0   0   100.0      na      na

hope helps.

i think there can better way aggregate. eg na.action should take identity function(a function returns input) such i function in base r. although i function changes class of object asis , challenge me within aggregate function. class(i(xy)).


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