R Question
Can't draw Histogram, 'x' must be numeric
I have a data file with this format:
Weight Industry Type
251,787 Kellogg h
253,9601 Kellogg a
256,0758 Kellogg h
....
I read the data and try to draw an histogram with this commands:
ce= read.table("file.txt", header= T)
we = ce[,1]
in = ce[,2]
ty = ce[,3]
hist(we)
But I get this error:
Error en hist.default(we) : 'x' must be numeric.
What do I need to do in order to draw histograms for my three variables ?
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Answer Source
Because of the thousand separator, the data will have been read as 'non-numeric'. So you need to convert it:
we <- gsub(",", "", we) # remove comma
we <- as.numeric(we) # turn into numbers
and now you can do
hist(we)
and other numeric operations.
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