search for: preeq0

...e results of the melt() and dcast() functions: str(waterchem) 'data.frame': 128412 obs. of 8 variables: $ site : Factor w/ 64 levels "D-1","D-2","D-3",..: 1 1 1 1 1 1 1 ... $ sampdate: Date, format: "2007-12-12" "2007-12-12" ... $ preeq0 : logi TRUE TRUE TRUE TRUE TRUE TRUE ... $ param : Factor w/ 37 levels "Ag","Al","Alk_tot",..: 1 2 8 17 3 4 ... $ quant : num 0.005 0.106 1 231 231 0.011 0.001 0.002 0.001 100 ... $ ceneq1 : logi TRUE FALSE TRUE FALSE FALSE FALSE ... $ floor : num 0...

...ose less than reporting levels) in a data frame with a narrow (i.e., database table) format. The structure is: $ site : Factor w/ 64 levels "D-1","D-2","D-3",..: 1 1 1 1 1 1 1 1 ... $ sampdate: Date, format: "2007-12-12" "2007-12-12" ... $ preeq0 : logi TRUE TRUE TRUE TRUE TRUE TRUE ... $ param : Factor w/ 37 levels "Ag","Al","Alk_tot",..: 1 2 8 17 3 4 9 ... $ quant : num 0.005 0.106 1 231 231 0.011 0.001 0.002 0.001 100 ... $ ceneq1 : logi TRUE FALSE TRUE FALSE FALSE FALSE ... $ floor : num...

...oid these errors in the future. The data frame structure is str(chem) 'data.frame': 120309 obs. of 8 variables: $ site : Factor w/ 65 levels ";Influent","D-1",..: 2 2 2 2 2 2 ... $ sampdate: Date, format: "2007-12-12" "2007-12-12" ... $ preeq0 : logi TRUE TRUE TRUE TRUE TRUE TRUE ... $ param : Factor w/ 37 levels "Ag","Al","Alk_tot",..: 1 2 8 17 3 9 ... $ quant : num 0 0.106 1 231 231 0.011 0 0.002 0 100 ... $ ceneq1 : logi FALSE FALSE TRUE FALSE FALSE FALSE ... $ floor : num 0 0.106 0 23...