timekiller

Jiayi Liu

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The timekiller is an R package with several unimportant, superstitious and personal R functions that help with killing time.

Also, writing this package itself is one of the ways to kill time.

This package is a form of "reinventing the wheel".

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Installation and loading:

• Install the latest developmental version from within R:

install.packages('devtools')
library('devtools')
devtools::install_github('jiayiliujiayi/timekiller', dependencies = T)

• or install with the source code: in your terminal, execute the following lines:

git clone https://github.com/jiayiliujiayi/timekiller.git 
R CMD INSTALL timekiller

• Loading the package:

library(timekiller)

Usage

Time to kill time!

Check what's happening from all corners of the world:

getPeoplesDaily(): scrape the latest news from the People’s Daily, China’s largest comprehensive media.
getNature(): wanna keep updated in the scientific world? Try this funcion to acquire the latest news from the Nature, a leading international weekly journal of science!
getScience(): another way of keeping updated in the scientific world: to obtain the latest news from the Science magazine!
more functions are being developed:))

Find it difficult to make a decision? Ask the timekiller:

tobeornottobe(): ask anything to timekiller, then you'll promptly get a Yes/No answer. The default question is "Should I study today?" Notice: The pious way of doing this is to ask one question once.

Wanna have some fun?

play24points(): the timekiller will randomly pick 4 pocker cards for you. You can define the max and min value of the cards to be picked.
myLuckyNumber(): get your lucky number for today! You could manipulate it by setting a range to the values using "max" and "min".
more functions are being developed:))

The most serious moment when calling timekiller--Playing Around with DATASETS!

• fast dataset inspection (the input could be either external files or internal elements)

  ifCharCols(): check if there's character type columns in a dataset
  getCharCols(): output the colnames of the charactor type columns
  ifNACols(): check if there's NA-containing columns in a dataset
  getNACols(): output the colnames of the NA-containing columns

• importing data in a faster way (credits to the package data.table!)

  fread.delim(): fast imports a data frame format text file as a 'data frame' element into the .GLobalEnv. Yes, it is a wrapper of the data.table::fread but we the oldschool might prefer working on a 'data frame' class element.

  The format of the input file looks like so:

  Gene.Symbol	Gene.ID_1	Gene.ID_2	Cell1	Cell2
  a	A	Aa	1	0
  b	B	Bb	1	1
  c	C	Cc	1	0
  c	C	Cc	2	5
  	NA	Dd	4	6

  fread.matrix(): fast imports a matrix format text file as a matrix into the .GlobalEnv. By default, the values with the same rownames in each column will be sumed. And yes, it is still a wrapper of the data.table::fread, with the maggrittr:%>%.

  The format of the input file looks like so:

  	Cell1	Cell2
  a	1	0
  b	1	1
  c	1	0
  c	2	5
  	4	6

• fast tramsforming data
  raw10xtoDF(): fast imports a raw 10X scRNA-Seq dataset, keeps the id column as you request in the argument "id", aggregates the same ids and sum (default, could be changed to "mean" or "median" per your request) the counts for each cell, then transform it into a dataframe.

  The format of the input file looks like so:

  Gene.Symbol	Gene.ID_1	Gene.ID_2	Cell1	Cell2
  a	A	Aa	1	0
  b	B	Bb	1	1
  c	C	Cc	1	0
  c	C	Cc	2	5
  	NA	Dd	4	6

  If the id = "Gene.Symbol', then the output 'data.frame' element looks like so:

  Gene.Symbol	Cell1	Cell2
  a	1	0
  b	1	1
  c	3	5
  novel	4	6

  If the id = "Gene.ID_2', then the output 'data.frame' element looks like so:

  Gene.ID_2	Cell1	Cell2
  Aa	1	0
  Bb	1	1
  Cc	3	5
  Dd	4	6

to be developed

some unimportant and superstitious functions

getNature: scrape latest research/news/opinions from nature.com
getScience/Cell? wrap these three or more into getSci?
whoAmItoday: randomly generate a noun
getWeather: arguments including "today"(default), "yesterday", "tomorrow" and "week" (which represents this week)
getAirQualityIndex/getAQI
play24points: generate four integers within the range of [1,10].
myLuckyNumber: generate today's lucky number, seed(Sys.Date %% 1e10)
getPoem(): eng and chn

data manipulation functions in the preprocessing of the genomic data

readCountsMatrix: fast read counts matrix (avoid using read.table)
raw10xtoMatrix aggregateGeneSymbols: sum counts with the same gene.symbols for each cell (call data.table .SD)
CountsToMatrix: call magrittr pipe; amend colnames(.)[1] before tranformation
MatrixToCounts: call pipe