# I will assume one data point per line, no headers in table

data <- read.csv("/path/to/data.txt", header=F, stringsAsFactors=F)
data <- data[, 1]

#you can plot this data already with, l = line
plot(data, type ='l', col='red', main='holygrail!!!')


number_of_bins <- 100
#this does a histogram
hist(data, breaks= number_of_bins, main='holygrail plot')