[R] Histogram from a single column of a data frame
r.turner at auckland.ac.nz
Sat Sep 27 00:32:03 CEST 2014
On 27/09/14 05:57, Richard Lerner wrote:
> Column 7 of "oded" is "Breed". If I enter
> I get the counts of the numbers in each breed.
> However, if I enter
> I have tried
> Error: unexpected '$' in "hist($"
> Error in hist(Breed) : object 'Breed' not found
> Error in hist.default("Breed") : 'x' must be numeric
>  "Subject.Name" "Date" "Species"
> "Age" "Sex"
>  "Spayed....Neutered" "Breed" "Breed.Code"
> How do I get a histogram of the counts in column 7?
Are you for real, or is this some kind of joke?
Assuming it's not a joke:
(1) Look at ?"$".
(2) WTF do you expect hist($Breed) to do? Where is "Breed" going to be
found, for pity's sake? You appear to have no understanding of how R
(or any programming language) works.
Read the Introduction to R manual and *get* some understanding if you
are going to use R.
(3) The correct usage obviously (and I mean ***really***; it *IS*
obvious) is hist(oded$Breed) --- which tells hist() where to find "Breed".
(4) You could also use
which is a useful syntax in some circumstances.
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