Created
July 11, 2019 11:42
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f <- function(toss=1){ | |
x <- sample(1:2, size=toss, replace=TRUE) | |
y <- sample(1:2, size=toss, replace=TRUE) | |
return(cbind(x,y)) | |
} | |
set.seed(2500) | |
toss_times <- as.data.frame(f(2000)) | |
library(plyr) | |
freq <- ddply(toss_times, ~x, summarize, | |
y1=sum(y==1), y2=sum(y==2)) | |
row.names(freq) <- paste0('x',1:2) | |
prob_table1 <- freq_table[,-1]/2000 | |
prob_table1 | |
prob_x <- table(toss_times$x)/2000 | |
prob_y <- table(toss_times$y)/2000 | |
prob_table2 <- outer(prob_x,prob_y,'*') | |
row.names(prob_table2) <- paste0('x',1:2) | |
colnames(prob_table2) <- paste0('y',1:2) | |
prob_table2 |
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