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Original code ## read in the data oj <- read.csv("oj.csv") head(oj) levels(oj$brand)
## read in the data oj <- read.csv("oj.csv") head(oj) levels(oj$brand)
levels(oj$brand) returns NULL.
Modified code
## read in the data oj <- read.csv("oj.csv", stringsAsFactors=T) head(oj) levels(oj$brand)
This works.
The text was updated successfully, but these errors were encountered:
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Original code
## read in the data oj <- read.csv("oj.csv") head(oj) levels(oj$brand)levels(oj$brand) returns NULL.
Modified code
## read in the data oj <- read.csv("oj.csv", stringsAsFactors=T) head(oj) levels(oj$brand)This works.
The text was updated successfully, but these errors were encountered: