trouble with contingency table in R -
i looked everywhere did not find answer question. having trouble makig contingency table. have data many columns, let 1, 2 , 3. in first column there let 100 different values, in second 20 , third column has 2 possible values: 0 , 1. first take data value 1 in column 3 (data<-data[column3==1,]). have around 20 different values in 1. column , 5 in 2. column. when contingency table size 100x20, not 20x5, , contains lot of zeros (they correspond combination of column1 , column2 has value 0 in column3). greatful every kind of help, thanks.
just use
table()
function data after doing
data<-data[column3==1,])
it might helpfull
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