Assignment1_-_Fall_17-1__2_.docx

Assignment1_-_Fall_17-1__2_.docx - Ruben Gonzalez-MW 9:40...

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Ruben Gonzalez -MW 9:40 - Homework 1 Getting Started with R ... Question 0: Replace YOUR NAME, YOUR SECTION and DATE in the heading of this document with the relevant values. MW or TR suffices for section. Be aware that points will be taking off on this homework and in the future if either of these quantities are unchanged. Undoubtably, you will forget to do this at least once before you print it out. It's fine if you hand-write that after it's printed out. Question 1: Define a variable x to be 5 using the left-arrow notation. Translate the following expressions into R and evaluate them. x<- 5 0.1 ( 16 12 )+ 5 2 × 10 3 x + 1 0.1 *( 16-12 )+( 5 ^ 2 )*( 10 /( 3 *x +1 )) #Code evaluating the expression (using x) ## [1] 16.025 5 x ( x 3 + 1.5 x 4 ) 5 *x*(x -3 +( 1.5 *x^ 4 )) #Code evaluating the expression (using x) ## [1] 23487.5 e 1 + 0.6 x 1 + e 1 + 0.6 x exp ( 1 +0.6 *x)/( 1 + exp ( 1 +( 0.6 *x))) #Code evaluating the expression (using x) ## [1] 0.9820138 1 + 2 x 3 ¿ 2 / 7 ¿
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( 1+2 *x^ 3 )^( 2 / 7 ) #Code evaluating the expression (using x) ## [1] 4.848653 Question 2: Download HW1-clickthru.xls. This is a small part of a kaggle.com competition concerned with predicting the clickthru rate of ads displayed on mobile devices. Open this file with Excel and save it as a comma-delimited file. Then, use read.csv to load this file into R, naming it . The column names are mostly self-explanatory. Variables starting with the word Site deal with the particular website on which the ad was displayed, variables starting with App deal with the App used to view the ad (Safari, Chrome, through a game, etc.), and variables starting with x are anonymized categorical variables (so trade secrets are not revealed). #Uncomment the line below when ready (saved as .csv from Excel, in BAS320 folder) Only remove the first hashtag CLICK <- read.csv ( "HW1-clickthru.csv" ) #Commenting out code makes it so code doesn't run. You'll notice this code is a different color. To comment code out, use the hashtag.
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