YU Create Extract Transform R Data Frame Exercise

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

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