I am trying to use reshape function in R to arrange my data timepoints in a table. The variable that I am using to split it is numerical, but when reshape arranges the table it incorrectly puts 2,0.5,4,6,8,0,24…168, instead of 0.0 , 0.5 , 2.0 , 4.0 , 6.0 , 8.0 , 24.0 , 48.0… 168.0