tsum3(CO2, "uptake", c("Type", "Treatment"), "conc")
tsum3(CO2, "uptake", c("Type", "Treatment"), "conc",
e=c("mean", "median", "sd", "min", "max", "length"),
h=list(c("mean", "sd", "length"), c("mean", "length")),
ol2=c("chilled", "nonchilled"),
repl=list(c("median", "length"), c("med", "n")))
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