Re: [R] Histogram from a single column of a data frame

2014-09-26 Thread Rolf Turner 

On 27/09/14 05:57, Richard Lerner wrote:

Column 7 of "oded" is "Breed". If I enter

summary(Breed)

I get the counts of the numbers in each breed.
However, if I enter


I have tried


hist($Breed)

Error: unexpected '$' in "hist($"


hist(Breed)

Error in hist(Breed) : object 'Breed' not found


hist("Breed")

Error in hist.default("Breed") : 'x' must be numeric

FYI


colnames(oded)

[1] "Subject.Name"   "Date"   "Species"
"Age""Sex"
[6] "SpayedNeutered" "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

with(oded,hist(Breed))

which is a useful syntax in some circumstances.

cheers,

Rolf Turner

--
Rolf Turner
Technical Editor ANZJS

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Re: [R] Histogram from a single column of a data frame

2014-09-26 Thread William Dunlap 
Try
  hist(oded$Breed)

(I suspect that summary(Breed) does not work in your current session either -
perhaps you had a dataset named just Breed or had attached the data.frame
oded in the session where summary(Breed) works.)

Bill Dunlap
TIBCO Software
wdunlap tibco.com


On Fri, Sep 26, 2014 at 10:57 AM, Richard Lerner  wrote:
> Column 7 of "oded" is "Breed". If I enter
>> summary(Breed)
> I get the counts of the numbers in each breed.
> However, if I enter
>
>
> I have tried
>
>> hist($Breed)
> Error: unexpected '$' in "hist($"
>
>> hist(Breed)
> Error in hist(Breed) : object 'Breed' not found
>
>> hist("Breed")
> Error in hist.default("Breed") : 'x' must be numeric
>
> FYI
>
>> colnames(oded)
> [1] "Subject.Name"   "Date"   "Species"
> "Age""Sex"
> [6] "SpayedNeutered" "Breed"  "Breed.Code"
>
> How do I get a histogram of the counts in column 7?
>
>
> Thanks
> Richard
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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[R] Histogram from a single column of a data frame

2014-09-26 Thread Richard Lerner 
Column 7 of "oded" is "Breed". If I enter
> summary(Breed)
I get the counts of the numbers in each breed.
However, if I enter


I have tried

> hist($Breed)
Error: unexpected '$' in "hist($"

> hist(Breed)
Error in hist(Breed) : object 'Breed' not found

> hist("Breed")
Error in hist.default("Breed") : 'x' must be numeric

FYI

> colnames(oded)
[1] "Subject.Name"   "Date"   "Species"
"Age""Sex"
[6] "SpayedNeutered" "Breed"  "Breed.Code"

How do I get a histogram of the counts in column 7?


Thanks
Richard

[[alternative HTML version deleted]]

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and provide commented, minimal, self-contained, reproducible code.