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Assignment 1 - IN PDF FORMAT Using R and Rstudio Pick a database from: data() Then preview...

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Advance Math

Assignment 1 - IN PDF FORMAT Using R and Rstudio

Pick a database from: data()

Then preview the first 10 rows.

Print the number of rows and columns

- Print the names of the variables

If you have row names, print them - work with the values for afield in your dataset. You can do it by dataset[[xx]] operator withxx can be the index of the field or the nae of the field.

Now use dataset[xx] to get a slice of datframe instead ofvector, e.g. df = mtcars[c(‘mpg’, ‘disp’)] - With two scalararguments (rows,columns), the [] operator can select elements inthe dataframe. Try this.

- Subset your data using rules similar to the lectures. Forexample part of the data that has a characteristics AND/OR anotherone, etc.

- Write a function that does an operation, for example averaginga property, on your dataset.

- Write a function that works on rows and adds a column to thedataset with the results for each row.

- Using the iris database, explain the following line ofcode:

data(iris) aggregate(iris[\"Petal.Length\"], by = iris[\"Species\"],FUN=median)

## Species Petal.Length

## 1 setosa 1.50

## 2 versicolor 4.35

## 3 virginica 5.55

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