Class Activity #1

#Question_1: Compute the log base 5 of 10 and the log of 10.

log(10, base =5)

[1] 1.430677

#Question_2:What is the batting average of a player that bats 42 hits in 212 at bats?

BA=(42)/(212)
BA

[1] 0.1981132

#Question_3:Compute the OBP for a player with the following general stats: #AB=565,H=156,BB=65,HBP=3,SF=7 #On Base Percentage #OBP=(H+BB+HBP)/(At Bats+H+BB+HBP+SF)

OBP=(156+65+3)/(565+156+65+3+7)
OBP

[1] 0.281407

On_Base_Percentage=round(OBP,digits = 3)
On_Base_Percentage

[1] 0.281

#Question_4: Define two vectors,runs_per_9innings and hits_per_9innings, each with five elements.

runs_per_9innings <- c(4, 7, 8, 2, 4)
hits_per_9innings <- c(5, 8, 1, 9, 3)

print(runs_per_9innings)

[1] 4 7 8 2 4

print(hits_per_9innings)

[1] 5 8 1 9 3

#Question_5: Get the first element of hits_per_9innings.

hits_per_9innings [1]

[1] 5

#Question_6: Get the last element of hits_per_9innings.

last_element <- hits_per_9innings[length(hits_per_9innings)]
print(last_element)

[1] 3

#Question_7: Find the most frequent value of hits_per_9innings.

getMode <- function(x) {
     ux <- unique(x)
     ux[which.max(tabulate(match(x, ux)))]
}

getMode(hits_per_9innings)

[1] 5

#Question_8: Summarize the following survey with the table() command: #What is your favorite day of the week to watch baseball? A total of 10 fans submitted this survey. #Saturday, Saturday, Sunday, Monday, Saturday,Tuesday, Sunday, Friday, Friday, Monday

x <- c("Saturday", "Saturday", "Sunday", "Monday", "Saturday","Tuesday", "Sunday", "Friday", "Friday", "Monday") 
table(x)

x
  Friday   Monday Saturday   Sunday  Tuesday 
       2        2        3        2        1 

#Question_9: What is the most frequent answer recorded in the survey? Use the getMode function to compute results.

getMode(game_day)

[1] "Saturday"