nassimhaddad

d1 <- density(rnorm(100))
d2 <- density(rnorm(100))
plot(range(d1$x, d2$x), range(d1$y, d2$y), type = "n", xlab = "x",
ylab = "Density")
lines(d1, col = "red")
lines(d2, col = "blue")

nassimhaddad

pb <- txtProgressBar(style = 3, min = 0, max = length(files_list))
i <- 0

for (file in files_list){
  i <- i+1
  setTxtProgressBar(pb, i)
 
  do_computations()
}

nassimhaddad

# install.packages("devtools")
# library(devtools)
# source_gist(6119745)

#' Example:
#' 
#' data(tea)
#' newtea = tea[, c("Tea", "How", "how", "sugar", "where", "always")]
#' test <- MCA(newtea)
#' test <- add_modified_rates(test)

nassimhaddad

# first install devtools in R
# then run:
# install.packages("devtools")
# library(devtools)
# source_gist(6031243)

lapply(c("ggplot2", 
         "xtable", 
         "markdown",
         "gdata",

nassimhaddad

library(RCurl)

# code in the address
address <- 'ftp://user:[email protected]' 

# get the list of files
items <- strsplit(getURL(address, .opts=curlOptions(ftplistonly=TRUE)), "\r\n")[[1]] 

# download a file
download.file(paste0(address, "/",items[1]) , items[1]) 

nassimhaddad

require(FactoMineR)
# load data tea
data(tea)
# select these columns
newtea = tea[, c("Tea", "How", "how", "sugar", "where", "always")]
mca1 = MCA(newtea, graph = FALSE, ncp = 5)

# coordinates of the categories of the variables along the dimensions
y_kl <- mca1$var$coord

nassimhaddad

Base Commands

Command	Description
wc	word count
ls	list directory contents
cd	change directory
pwd	returns present working directory
type	tells whether a command is built-in or a program
rm	remove

nassimhaddad

##' @title f function
##' 
##' f function
##' 
##' @param x data 
##' @param y data
##' @return data
##' 

nassimhaddad

result = tryCatch({
    expr
}, warning = function(w) {
    warning-handler-code
}, error = function(e) {
    error-handler-code
}, finally {
    cleanup-code
}

nassimhaddad

How to change language setting of R on Windows

• Go to the "etc" folder under R program files folder.
• Locate Rconsole file.
• Find the line "language = ", change it to "language = en" if you want to run R in English.
• Save the modified file in another folder first, delete the original one and place the new in place.