ccbrandenburg/r_assignment

First assignment R for Statistical Analysis

r_assignment's Issues

Progress Completed - Sunday, 13/12/2015

Completed:

For each factor -- Days-of-Week and Data_Channels -- we:

1. Plotted shares vs. factor (scatterplot)
2. Plotted shares vs. factor (box plot)
3. Plotted log(shares) vs. factor
4. Completed ANOVA test
5. Only for Data_Channels, we removed the Other category and re-ran ANOVA
6. Calculated means for each factor

PCA in R

http://www.r-bloggers.com/computing-and-visualizing-pca-in-r/

log transform

log.ir <- log(iris[, 1:4])
ir.species <- iris[, 5]

apply PCA - scale. = TRUE is highly

advisable, but default is FALSE.

ir.pca <- prcomp(log.ir,
center = TRUE,
scale. = TRUE)
print(ir.pca)

--> Will show the standard deviation for the first 4 variables in iris data set