R Dataset / Package lme4 / cake
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dataset-73815.csv | 5.69 KB |
Documentation |
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On this Picostat.com statistics page, you will find information about the cake data set which pertains to Breakage Angle of Chocolate Cakes. The cake data set is found in the lme4 R package. Try to load the cake data set in R by issuing the following command at the console data("cake"). This may load the data into a variable called cake. If R says the cake data set is not found, you can try installing the package by issuing this command install.packages("lme4") and then attempt to reload the data with library("lme4") followed by data("cake"). Perhaps strangley, if R gives you no output after entering a command, it means the command succeeded. If it succeeded you can see the data by typing cake at the command-line which should display the entire dataset. 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 cake R data set. The size of this file is about 5,828 bytes. Breakage Angle of Chocolate CakesDescriptionData on the breakage angle of chocolate cakes made with three different recipes and baked at six different temperatures. This is a split-plot design with the recipes being whole-units and the different temperatures being applied to sub-units (within replicates). The experimental notes suggest that the replicate numbering represents temporal ordering. FormatA data frame with 270 observations on the following 5 variables.
DetailsThe SourceOriginal data were presented in Cook (1938), and reported in Cochran and Cox (1957, p. 300). Also cited in Lee, Nelder and Pawitan (2006). ReferencesCook, F. E. (1938) Chocolate cake, I. Optimum baking temperature. Master's Thesis, Iowa State College. Cochran, W. G., and Cox, G. M. (1957) Experimental designs, 2nd Ed. New York, John Wiley \& Sons. Lee, Y., Nelder, J. A., and Pawitan, Y. (2006) Generalized linear models with random effects. Unified analysis via H-likelihood. Boca Raton, Chapman and Hall/CRC. Examplesstr(cake) ## 'temp' is continuous, 'temperature' an ordered factor with 6 levels(fm1 <- lmer(angle ~ recipe * temperature + (1|recipe:replicate), cake, REML= FALSE)) (fm2 <- lmer(angle ~ recipe + temperature + (1|recipe:replicate), cake, REML= FALSE)) (fm3 <- lmer(angle ~ recipe + temp + (1|recipe:replicate), cake, REML= FALSE))## and now "choose" : anova(fm3, fm2, fm1) -- Dataset imported from https://www.r-project.org. |
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R Output | Date |
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Picostat Output - Bar Plot for One Variable | Jan 16, 2023 |
Picostat Output - Bivariate Plot | Jan 16, 2023 |
Picostat Output - Bivariate Plot | Jan 16, 2023 |
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