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A series of tutorials, in R, by Anthony Damico. As claimed on http://twotorials.com/, "how to do stuff in r. two minutes or less, for those of us who prefer to learn by watching and listening". So far,000 what is r? the lingua statistica, s'il vous plaît001 how to download and install r002 simple shortcuts for the windows r console003 how to do simple arithmetic in r004 how to create a variable with r005 how to use the c (combine) function006 what does object oriented statistical programming really mean?007 how to work with data tables in r008 how to install and load a package in r009 how to use a function and read the help files in r010 how to read csv files into r011 how to create a logical test and then build an if statement in r012 how to build a for loop in r013 how to read spss, stata, and sas files into r014 how to read an excel file (dot xls and dot xlsx) into a data frame with r015 how to work with character strings in r016 how to add comments, save a script file, and make your work reproducible in r017 how to use coercion and convert numbers to characters to logicals in r018 help resources for r: the r-help mailing list, ucla academic technology services, and r-bloggers019 how to access different records within a data frame by using logical tests in r020 how to use the ifelse function in r021 how to put things together in r: c (combine), paste, the paste collapse parameter, and the outer function022 how to generate basic descriptive statistics - means, medians, sums, quantiles - on data tables in r023 how to prevent r from breaking when it hits an error with the try function024 how to run counts, tables, crosstabs, and flat tables on a data frame in r025 how to change and recode variables and values in a data table using the fix and transform functions in r026 how to sort and order stuff in r027 how to run sql commands on data frames in r with the sqldf package028 how to merge stuff together using the merge, cbind, rbind, and rbind.fill functions in r029 how to run analyses across multiple categories of a data table with the tapply and aggregate functions in r030 what is a function anyway and how does it input and output stuff in r031 what are the different logical tests that you can conduct in r032 how to handle NA (missing values) in r: understand and detect NA, remove NA, replace NA with 0033 what does the %in% operator do and how does it differ from the double equals (==) sign?034 how to enter your own data by hand and create a data frame in r035 how to name or rename rows and columns in a data frame in r036 how to output or export data and write tables to csv files in r037 how to round a number in r: round, floor, ceiling, even excel_round038 how to graph simple plots and make scatterplots in r039 how to draw a line, add points, overlay a plot once it's been created with (low-level) plotting functions in r040 how to remove rows and columns from a data table in r041 did someone send you a script file or computer code for the r programming language? here's how to run it!042 how do functions within functions within functions work in r?043 when and how to use the %in% operator when accessing rows in a data frame that contains missing values in r044 how and why r repeats an element over and over again without you even knowing it045 how to bin or categorize or group data into new variables in a data table in r with the ifelse function046 how to delete or remove variables, objects, data tables, and other stuff from memory in r047 how many different ways can you slice and dice (subset) a data table in r?048 how to download a data table or zipped file from the web directly into r, save it locally, then load or open it049 how to make custom data tables and aggregate data tables with sql commands in r050 how to count stuff in r and then use those counts to loop through stuff051 how to read and write excel files with the xlsx package in r052 how to output or export data tables from r into different formats: dbf, stata, spss, and sas files053 how to import and export data to and from your windows clipboard with r054 how to merge data frames one-to-one, many-to-one, one-to-many, many-to-many and make sure you did it right in r055 how to (make or generate or draw or display) a (boxplot or histogram or bar graph or pie chart) in r056 how to bin or categorize or group data into new variables in a data table or vector in r with the cut function057 how to use the sample function and sample from a vector or take a random sample of rows from a data frame in r058 how to use the subset function in r for more intuitive subsets of data frames059 how to search within a string for matches, substitute stuff in strings, even trim whitespace in a string in r060 how to output or export data frames in r to a sas transport file (dot xpt) with the write.xport function061 how to generate a random number in r062 how to generate random numbers according to different statistical distributions in r063 how to generate the same random number every time you run a program in r with the set.seed function064 fun one: how many ancestors did you have in each previous generation?065 how to title a plot or graph in r, add axes and other text or words with the axis and text functions066 how to (dynamically) create different objects according to a pattern using the assign function067 how to (dynamically) retrieve different objects according to a pattern using the get function068 how and when to load and save your workspace in r069 how to access the elements of a list object and create your own list variable in r070 how to nest for loops in r and then debug and troubleshoot them if you hit an error you cannot identify071 how to create and nest while loops in r072 how to use the mod (modulus) function in r to calculate a remainder073 how to run your first regression in r (assuming you know some fancy statistics)074 how to calculate a variance and standard deviation and then normalize data in r075 how to clear variables, clear a workspace, clear your screen, even clear unused computer memory in r076 how to load and then run or execute a script in r with the source function077 how to time a function or other processes in r like a stopwatch with the Sys.time() command078 how to initiate empty objects like data tables and matrices in r079 how the if function (if then) differs from ifelse, single-line if, nested if, and brackets in r080 how to beautify your r script with formatR and the tidy.source function081 how to write a for, while, or repeat loop in r with the break and next commands082 how to test for correlation between two variables in r083 how to plot residuals from a regression in r (assuming you know some fancy statistics)084 how to flip a coin or generate a bernoulli or binomial distribution without quaking in fear in r085 how to export or save a plot in r086 fun one: what is each country's most current available percent of gross national income spent on education?087 how to split a character string in r with the strsplit function088 how to change options and global settings like the number of decimal places shown in r with the options function089 how to run a block of commands at start-up to do stuff like setting your CRAN mirror permanently with r090 fun one: how to calculate your ten, fifteen, or twenty thousandth day on earth with r091 fun one: how to make perfect pour-over coffee and time your french press steeping with r(I guess there is no need now to make my own....)