Description
### R workshop#2- Exercise #1
#Create the following data frame a. use the UNITID as the row name; are you able to use
#SEGMENT_ID as the row name? b. Set the column SEGMENT_ID as characters
#c.Check the class of the data frame
#UNITID SEGMENT_ID MW PRICE
#AYER band1 135 24
#SHUER band1 230 50
#BUSHA band1 105 26
#MINA band1 97 34
#TEUA band1 300 74
#######################Data extraction and transformation ######################
#extract information from a data frame###### R workshop#2 – Exercise #2
#Working with the ‘iris’ data set that is in the base package
#a. Get an overview of a data set ‘iris’
#b. Extract all rows of Species ‘versicolor’ in a new data frame.
# Call this data frame: ‘iris.versicolor’
#c. Get a vector called ‘sepal.diff’ with the difference between
#’Sepal.Length’ and ‘Sepal.Width’ of ‘versicolor’ plants.
#d. Update (add) ‘iris.versicolor’ with the new column ‘sepal.diff’.
#e. Sort the data frame with respect to the new column ‘sepal.diff’.
#f. Extract Sepal.Length from the “iris” dataset and call the resulting vector mysepal
#g. Get the summation, mean, median, max and min of mysepal
#h. Get the summary of mysepal and compare the results with #g