RinAction - R Functions - Statistical Functions

gistfile1.r

#################################################
##             Basic Stats Functions           ##
#################################################

# quantile(x,probs)         -- Quantiles where x is the numeric vector where 
#                              quantiles are desired
#                           -- y <- quantile(x, c(0.3, 0.84))
# range(x)                  -- Range
#                           -- range(c(1,2,3,4)) returns c(1,4)
#                           -- diff(range(c(1,2,3,4))) returns 3
# sum(x)                    -- sum(c(1,2,3,4)) returns 10
# diff(x,lag=n)             -- lagged difference
# min(x)
# max(x)
# scale(x,center=TRUE, scale=TrUE)


####################
# Standardizing Data
####################

# 1 - standardize to 0 mean and 1 sd
newdata <- scale(mydata)

# 2 - standardize to arbitrary mean and sd
newdata <- scale(mydta)*SD + M

# 3 - standardize a column/variable
newdata <- transform(mydata, myvar = scale(myvar)*10+50)