You've misplaced the comma.
mysample <- df[, sample(ncol(df), 50, replace=FALSE)]
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
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1070 Anderlecht
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Thierry.Onkelinx at inbo.be
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asking him to perform a post-mortem examination: he may be able to say what the
experiment died of.
~ Sir Ronald Aylmer Fisher
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~ Roger Brinner
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that a reasonable answer can be extracted from a given body of data.
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-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens catalin roibu
Verzonden: maandag 26 augustus 2013 11:41
Aan: r-help at r-project.org
Onderwerp: [R] arbitrary subset of dataframe
Dear all!
I want to arbitrary subset a data frame by variables.
I try this code, but the subset work only for rows, but I want to subset by
variables.
# sample without replacement
mysample <- df[sample(1:ncol(df), 50,
replace=FALSE),] Please help me to solve this problem!
Thank you!
Best regards!
CR
--
---
Catalin-Constantin ROIBU
Lecturer PhD, Forestry engineer
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone +4 0230 52 29 78, ext. 531
mobile phone +4 0745 53 18 01
+4 0766 71 76 58
FAX: +4 0230 52 16 64
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