Category: status

Vim plugin surround Normal mode ds delete a…

vous pouvez l'essayer Vim plugin surround

Normal mode
———–
ds – delete a surrounding
cs – change a surrounding
ys – add a surrounding
yS – add a surrounding and place the surrounded text on a new line + indent it
yss – add a surrounding to the whole line
ySs – add a surrounding to the whole line, place it on a new line + indent it
ySS – same as ySs

Visual mode
———–
s – in visual mode, add a surrounding
S – in visual mode, add a surrounding but place text on new line + indent it

http://www.catonmat.net/blog/vim-plugins-surround-vim/

November 3, 2012
http jeromyanglim blogspot ca 2010 05 abbreviations of…

http://jeromyanglim.blogspot.ca/2010/05/abbreviations-of-r-commands-explained.html

250+ R commands.
Often times R users suffer from difficulties finding what commands are available for a specific process.
This lists 250+ R commands in table.

November 2, 2012
Surround a VIM plugin that surrounds a word…

Surround, a VIM plugin that surrounds a word or a line.

http://www.catonmat.net/blog/vim-plugins-surround-vim/

August 24, 2012
Perl Getopt Long The module check wrong argument…
Perl Getopt::Long.

The module check wrong argument but does not check when no argument is provided.
In order to check if there is no argument as well as wrong argument,
check the argument also.
```
GetOptions( 'test=s' => \$option_test )
    or exit(1);

defined($option_test)
    or die("Missing argument -t");
```
http://www.perlmonks.org/?node_id=789974
August 17, 2012

Auto size of images in Beamer class \usepackage…

Auto size of images in Beamer class.

\usepackage{letltxmacro}
\makeatletter
\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi}
\makeatother
\AtBeginDocument{
  \LetLtxMacro\Oldincludegraphics\includegraphics
  \renewcommand{\includegraphics}[2][]{%
    \Oldincludegraphics[#1,width=\maxwidth]{#2}}
}

http://tex.stackexchange.com/questions/67434/redefine-includegraphics-for-beamer#comment143600_67434

August 17, 2012

Beamer paper size is smaller than usual paper…
Beamer paper size is smaller than usual paper size.
The “paper size” of a beamer presentation is ﬁxed to 128mm times 96mm.

With this trick, the normal font can be shown nicely.
But be cautious setting the image size with absolute value.
or use
```
\includegraphics[width=0.6\textwidth]{graphics.pdf}
```
http://web.mit.edu/8.13/presentations/beameruserguide.pdf

Citation
August 16, 2012
R color palettes # Basic grDevice rainbow topo…
R color palettes
1. Basic grDevice
rainbow()
topo.colors()
terrain.colors()
heat.colors()
```
my.palette <- terrain.colors(100)
```
1. RColoBrewer package
```
display.brewer.all()
```
my.palette <- brewer.pal(n, name) For example, my.palette <- brewer.pal(9, "Blues") However, the number of colors is limited up to 9, in most colors. Then use this.
```
more.color.palette <- colorRampPalette(brewer.pal(9,"Blues"))(100)
```
http://stackoverflow.com/questions/3832850/color-schemes-in-r
http://www.compbiome.com/2010/12/r-using-rcolorbrewer-to-colour-your.html
August 9, 2012
RColorBrewer palette names

RColorBrewer palette names.

August 9, 2012

Change the label of legend not by changing…

Change the label of legend not by changing the data.

# data
grp <- gl(n=4,k=20,labels=c("group a","group b","group c", "group d"))
value <- runif(n=80, min=10, max=150)
outcome <- cut(value,2)
data <- data.frame(grp,value,outcome)

# Option 1
# breaks should be exactly the same as the levels of the factor
ggplot(data, aes(grp, fill=outcome)) + geom_bar() +xlab("group") +
    ylab("number of subjects") + 
    scale_fill_discrete("Serologic response", 
                        breaks=c("(12.1,79.7]","(79.7,147]"),   # should be the same as the levels of the factor
                        labels=c("double negative", "positive for a and/or b")
                        )

# Option 2
# simpler because factor() takes care of the levels of the factor
ggplot(data, aes(grp, 
         fill=factor(outcome,labels=c("double negative","positive for a")))) + 
    geom_bar() +xlab("group") +ylab("number of subjects") +
    labs(fill="Serologic response")

http://stackoverflow.com/questions/7323191/how-do-i-manually-change-the-key-labels-in-a-legend-in-ggplot2

August 9, 2012

R factors levels labels # sample data originally…

R factors, levels, labels

# sample data originally numbers
# 1 = male, 2 = female

people.n <- c(1, 1, 2, 2, 2)
people.c <- c("male", "male", "female", "female", "female")

# create a factor
people.n.f <- factor(people.n, levels = c(1, 2), labels = c("male", "female"))
people.c.f <- factor(people.c, levels = c("male", "female"), labels = c("male", "female"))

# if you want to change the order of the levels, 
people.n.f <- factor(people.n, levels = c(2, 1), labels = c("female", "male"))

# levels follows alphabetical order if not specified
# compare this with people.c.f
factor(people.c)

# without specifying levels and labels
# the original data will be used
factor(people.n)

# once used to create a factor, levels and labels are merged.
# there is no labels attribute in factor.
# correct
levels(people.c.f)
levels(people.c.f) <- c("man", "woman")
people.c.f

#wrong
labels(people.c.f)
labels(people.c.f) <- c("man", "woman")

Conclusion
By default, factor() order the levels alphabetical order or numerical order.
If you want to change the sorting order of levels manually, you need to set it when the factor is created.
It can not be changed later, even though the levels can be changed.

When creating a factor, the data and the order should be matched as the example.

factor(people.c, levels = c("male", "female"), labels = c("male", "female")) 
          ^ ---- same data ---------^    ^-------------same order -----^

August 9, 2012