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+# Biocomputing 2022
+# Exercise 10, 2022-11-18
+# Written by Xiyuan Guan
+
+library(ggplot2)
+
+# task 1: figure time vs. score for teams
+setwd("C:/Users/guanx/Documents/N.ND/BIOS 60318 Biocomputing/test/exercise10/Exercise10/")
+
+ball <- read.table("UWvMSU_1-22-13.txt",sep = "\t", header = TRUE)
+head(ball)
+line1 <- c(0,"UW",0)
+line2 <- c(0,"MSU",0)
+ball <- rbind(line1,line2,ball)
+unique(ball$team) # "UW"  "MSU"
+ball$time <- as.numeric(ball$time)
+ball$sumscore[ball$team=="UW"] <- cumsum(ball$score[ball$team=="UW"])
+ball$sumscore[ball$team=="MSU"] <- cumsum(ball$score[ball$team=="MSU"])
+
+
+ggplot(ball, aes(x=time, y= sumscore, color=team))+
+  geom_line(linewidth=1.5)+
+  scale_x_continuous(limits = c(0,40),
+                     expand = c(0,0),
+                     n.breaks = 5,
+                     labels = c("0","1st","2nd","3rd","4th"))+
+  scale_y_continuous(limits=c(0,50),
+                     expand = c(0,0))+
+  xlab(NULL)+
+  ylab(NULL)+
+  theme(panel.grid.major.x = element_line(colour = "grey"),
+        panel.grid.major.y = element_line(colour = "grey"),
+        panel.grid.minor.x = element_blank(),
+        panel.grid.minor.y = element_blank())+
+  theme(legend.title=element_blank(),
+      panel.background = element_rect(fill = "white"))
+# How to put sections in the middle of grids?
+ball$intr[ball$time<10 & ball$time>=0] <- 5
+ball$intr[ball$time<20 & ball$time>=10] <- 15
+ball$intr[ball$time<30 & ball$time>=20] <- 25
+ball$intr[ball$time<=40 & ball$time>=30] <- 35
+ball$section[ball$time<10 & ball$time>=0] <- "1st"
+ball$section[ball$time<20 & ball$time>=10] <- "2nd"
+ball$section[ball$time<30 & ball$time>=20] <- "3rd"
+ball$section[ball$time<=40 & ball$time>=30] <- "4th"
+
+
+ggplot(ball, aes(x=time, y= sumscore, color=team))+
+  geom_line(linewidth=1.5)+
+  labs(x = NULL, y= NULL)+
+  scale_x_continuous(breaks = ball$intr,
+                   labels = ball$section,
+                   expand = c(0,0))+
+  scale_y_continuous(limits=c(0,50),
+                     expand = c(0,0))+
+  theme(panel.grid.major.x = element_blank(),
+        panel.grid.major.y = element_line(colour = "grey"),
+        panel.grid.minor.x = element_line(colour = "grey"),
+        panel.grid.minor.y = element_blank())+
+  geom_vline(xintercept = c(0,40), color = "grey")+ 
+  theme(legend.title=element_blank(),
+        panel.background = element_rect(fill = "white"))
+
+# task 2: Write a game called “guess my number”.
+
+guess_my_number <- function(){
+  answer<- sample(1:100,1) # randomly select a number from 1 to 100
+  print("I'm thinking of a number 1-100...")
+  for(i in 1:10){
+    cat("Guess:", scan(what = "interger", n = 1)->guess) # ask player to input a number
+    guess <- as.numeric(guess)
+    if(guess==answer){
+      print("Correct!")
+      break
+    }else if(guess>answer && guess<=100){
+      print("Lower")
+    }else if(guess<answer && guess>=1){
+      print("Higher")
+    }else{
+      print("Wrong input! Out of range (1~100)!") # Increased Robustness
+    }
+    if(i == 10 & guess!=answer){
+      print("Run out of times to try! Rerun the code to start a new game.")
+      cat("The correct answer is: ", answer)
+    }
+  }
+}
+guess_my_number()