R Dataset / Package MASS / npk
| Attachment | Size |
|---|---|
| dataset-94871.csv | 518 bytes |
| Dataset Help |
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On this Picostat.com statistics page, you will find information about the npk data set which pertains to Classical N, P, K Factorial Experiment. The npk data set is found in the MASS R package. You can load the npk data set in R by issuing the following command at the console data("npk"). This will load the data into a variable called npk. If R says the npk data set is not found, you can try installing the package by issuing this command install.packages("MASS") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the npk R data set. The size of this file is about 518 bytes. |
| Documentation |
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Classical N, P, K Factorial ExperimentDescriptionA classical N, P, K (nitrogen, phosphate, potassium) factorial experiment on the growth of peas conducted on 6 blocks. Each half of a fractional factorial design confounding the NPK interaction was used on 3 of the plots. Usagenpk FormatThe
NoteThis dataset is also contained in R 3.0.2 and later. SourceImperial College, London, M.Sc. exercise sheet. ReferencesVenables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer. Examples
options(contrasts = c("contr.sum", "contr.poly"))
npk.aov <- aov(yield ~ block + N*P*K, npk)
npk.aov
summary(npk.aov)
alias(npk.aov)
coef(npk.aov)
options(contrasts = c("contr.treatment", "contr.poly"))
npk.aov1 <- aov(yield ~ block + N + K, data = npk)
summary.lm(npk.aov1)
se.contrast(npk.aov1, list(N=="0", N=="1"), data = npk)
model.tables(npk.aov1, type = "means", se = TRUE)
-- Dataset imported from https://www.r-project.org. |
| Curated Data | File Size |
|---|---|
| OpenIntro Statistics Dataset - yrbss_samp | 7.62 KB |
| OpenIntro Statistics Dataset - yrbss | 1.03 MB |
| OpenIntro Statistics Dataset - yawn | 861 bytes |
| OpenIntro Statistics Dataset - xom | 4.95 KB |
| OpenIntro Statistics Dataset - winery_cars | 489 bytes |
| All Public Datasets | File Size |
|---|---|
| PSID | |
| wage1 | 328 bytes |
| OpenIntro Statistics Dataset - yrbss_samp | 7.62 KB |
| OpenIntro Statistics Dataset - yrbss | 1.03 MB |
| OpenIntro Statistics Dataset - yawn | 861 bytes |
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