df is the name of a function in base R. You have not provided a definition
of sample data resembling your real data. In this case I suspect that the
source of your problems is that df may not be what you think it is.
Learning to use the "str" function may help you.
If df is a data frame contai
Hi:
I have one million names of city and their population and want to make
a hash so that by giving key = city, the hash function will return its
population.
I use the hash package in R as follows:
h <- hash(c(as.vector(df$city)), c(as.vector(df$population)))
But getting the following error:
Err
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