[R] Getting column names in the titles of histograms generated automatically

[Rui Barradas]

Hello,

You could also try function multi.hist() in package psych.

Hope this helps,

Rui Barradas

Em 08-01-2015 03:36, John Sorkin escreveu:
> Richard,
> WOW! A totally new way to think about loop indices, many, many, thanks!John
>
>
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
>>>> "Richard M. Heiberger" <rmh at temple.edu> 01/07/15 10:27 PM >>>
> tmp <- data.frame(a=rnorm(10), b=rnorm(10))
> for (i in names(tmp)) hist(tmp[[i]], main=paste("histogram of", i))
>
>
> On Wed, Jan 7, 2015 at 10:13 PM, John Sorkin
> <JSorkin at grecc.umaryland.edu> wrote:
>> I am trying to automatically produce a series of histograms from every column of data frame with many columns.
>> The columns names of a shortened from of the data frame follow:
>>
>>
>> colnames<-names(smdata)
>> colnames
>> [1] "X13594_pre" "X15568_pre"
>>
>>
>> I want to have
>> X13594_pre in the title of the first histogram and
>> X15568_pre in the title of the second histogram.
>>
>>
>> I use the following code to automatically generate my histograms:
>>
>>
>> for (i in 1:2){hist(smdata[,colnames[i]])}
>>
>>
>> The titles of the histograms produced are:
>> Histogram of smdata[,colnames[i]]
>> and
>> Histogram of smdata[,colnames[i]]
>>
>>
>> How can I get the titles
>> Histogram of smdata[,X13594_pre]
>> and
>> Histogram of smdata[,X15568_pre]
>>
>>
>> John David Sorkin M.D., Ph.D.
>> Professor of Medicine
>> Chief, Biostatistics and Informatics
>> University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
>> Baltimore VA Medical Center
>> 10 North Greene Street
>> GRECC (BT/18/GR)
>> Baltimore, MD 21201-1524
>> (Phone) 410-605-7119
>> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>>
>>
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>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
>
>
> Confidentiality Statement:
> This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>