[R] Cannot Sum with DDPLY

[Shivi82]

Hi All,
Kindly see the below code I have used:
maxorder<-ddply(test, ~ ORIGIN,summarize,Weight=sum(CHG_WT))

Here I have written the code to summarize values based on origin and total
weight however I am getting below error:
Error: ‘sum’ not meaningful for factors

Please advice. I need CHG_WT total for each state in the Origin column.




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