knitr::opts_chunk$set(echo = TRUE)
Here is a link to the text of these exercises.
Calculate the mean and variance of the Ozone
, Solar.R
, Wind
, and Temp
variables for each month in the airquality
dataset, ignoring NA
values. Use summarize()
first, then use summarize_at()
. Note that arguments to summary functions can be passed as dots to summarize_at()
.
Calculate mean expression values for each nutrient
in brauer_gene_exp
. Calculate the values by sampling 1%, 10% and 50% of the rows. How do your numbers change at each threshold?
Join the brauer_gene_exp
and yeast_prot_prop
tables and calculate the mean codon adaptation index (CAI
in yeast_prot_prop
) for each molecular funtion (MF
in brauer_gene_exp
). Sort the results from largest to smallest mean CAI.
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