All functions

bib()

Create a bib file for R packages, including the citations of userdefined packages. 
dfplot()

Plot a dataframe, multiple ys against one x 
dfplot2()

Plot a dataframe, one y against multiple xs 
errorbar()

add error bars to a scatterplot. 
list2ascii()

Save a list into an ASCII file. in: a list. out: a file. 
lmdf()

calculate linear regression between every two columns in a data frame. in: a dataframes. out: a dataframe showing the linear regression. 
mf_skewness()

Calculate the skewness of a distribution 
name()

Enhancement of names() 
plotblank()

plot a blank figure 
plotcolorbar()

A reminder for color bars. More palettes can be found in 'colormap', 'RColorBrewer', and 'dichromat' packages. 
plotcolors()

A reminder for colors 
plothist()

Plot a usercustomized hist 
plotlm()

plot a linear regression figure and return a list of parameters. 
plotlty()

A reminder for lty 
plotpairs()

plot pairwise correlations. in: a dataframe. out: a figure. 
plotpairs2()

plot pairwise correlations with p value. in: a dataframe. out: a figure. 
plotpch()

A reminder for pch 
plotpkg()

plot daily download counts of packages 
plottype()

A reminder for type 
readdir()

Read multiple tables into a list. 
rpkg()

Create a new R package demo folder 
se()

standard error 
tapplydf()

a friendly version of tapply for dataframes 
tapplydfv()

a friendly version of tapply 
writefile()

save csv file with asking if the file already exists. 