Difference between revisions of "R"

Revision as of 11:58, 28 January 2013

R ( http://www.r-project.org/) is an open source software- a well organized and sophisticated package- that facilitates data analysis, modeling, inferential testing and forecasting. It is a user friendly software which allows to create new function commands to solve statistical problems. It runs on a variety of UNIX platforms(and similar systems such as LINUX), Windows and Mac OS.

R is a free, useful software package to anybody who wishes to undertake extensive statistical computations (a user community that includes students, researchers and professionals belonging to various disciplines).

The Centre for Computational Social Sciences, UPE programme (under the UGC scheme), University of Mumbai, is leading the initiative of popularizing R in India which is part of the Free and Open source Software for Science and Engineering Education (FOSSEE) project, supported by the National Mission on Education through ICT of MHRD (http://spoken-tutorial.org/NMEICT-Intro).

The Centre for Computational Social Sciences is using Spoken Tutorials (http://spoken-tutorial.org/) to create learning resources for FOSS. This is the main page for the organization of the scripts required for R spoken tutorials. We invite the R user community to participate in this activity.

R Slide Template                                                                                                                               Glossary

BASIC LEVEL TUTORIALS

Introductory sessions in R

1. Installing R
   • Downloading and installing R
2. Basic operations in the R console    (Scripts)    [(Spoken Tutorials)]
   • To open the R console
   • To run commands in R
   • To correct errors made in the R commands
   • To save work done in R
   • To quit the R console
3. Documentation and Packages in R    (Scripts)    [(Spoken Tutorials)]
   • To access installed documentation and packages in R
   • To install and load packages in R

   Data structures

4. Variables and Vectors in R    (Scripts)    [(Spoken Tutorials)]
   • Creation and deletion of variables and vectors
   • Listing the vectors
   • Modifying vectors
   • Creating row and column vectors
5. Vector Algebra and Matrices in R    (Scripts)    [(Spoken Tutorials)]
   • Vector algebra
   • Creating matrices
   • Matrix operations
6. Sequences, lists, strings and dates in R    (Scripts)    [(Spoken Tutorials)]
   • Creation of sequences and lists
   • Modifying lists, selecting elements from a list
   • Modifying strings, substrings
   • Date-string conversion
   • Other functions related to dates
7. Handling data in R    (Scripts)    [(Spoken Tutorials)]
   • Creating and modifying data frames
   • Reading data stored in files of different formats

   Basic computations in R

8. Elementary operations in R    (Scripts)    [(Spoken Tutorials)]
   • Arithmetic
   • Higher powers and roots of a number
   • Logarithms and exponentials
   • Operations on complex numbers
9. Measures of central tendency and dispersion    (Scripts)    [(Spoken Tutorials)]
   • Mean, median and mode
   • Variance, standard deviation and quantiles

   Probability distributions

10. Discrete probability distributions:Binomial,Poisson and Geometric    (Scripts)    [(Spoken Tutorials)]
    • Binomial,Poisson and Geometric densities, distribution and quantile functions, random variables
11. Discrete probability distributions:Negative Binomial and Hypergeometric    (Scripts)    [(Spoken Tutorials)]
    • Negative Binomial and Hypergeometric densities, distribution and quantile functions, random variables
12. Continuous probability distributions    (Scripts)    [(Spoken Tutorials)]
    • Normal, Chi squared, F and t densities, distribution and quantile functions, random variables
    • Log-normal, logistic, exponential and gamma densities, distribution and quantile functions, random variables
    • Beta, cauchy and weibull densities, distribution and quantile functions, random variables

    Graphical representation of information using R

13. Histograms, barcharts and box plots    (Scripts)    [(Spoken Tutorials)]
    • Creating histograms, addding density estimate to a histogram
    • Creating and colouring bar charts, adding confidence intervals
    • Creating box plots
14. Scatter diagrams, regression lines and Q-Q plots    (Scripts)    [(Spoken Tutorials)]
    • Plotting a scatter digram, adding title, label, grid and a legend
    • Graphing a function, a regression line (superimposing on scatter plot)
    • Creating Q-Q plots

    Econometrics in R

15. Simple and multiple linear regression    (Scripts)    [(Spoken Tutorials)]
    • OLS, log-linear, log-log and semi-log regressions
    • Dummy variable regression, regression through the origin and with standardised coefficients
16. Regression Analysis    (Scripts)    [(Spoken Tutorials)]
    • Confidence intervals
    • P-values and power functions
17. Tests for heteroskcedasticity    (Scripts)    [(Spoken Tutorials)]
    • Park test
    • Goldfeld-Quandt test
    • Breusch-Pagan-Godfrey test
    • White’s General Heteroskcedasticity test
18. Tests for autocorrelation and specification errors   (Scripts)    [(Spoken Tutorials)]
    • Durbin Watson test
    • Ramsey reset specification test

ADVANCED LEVEL TUTORIALS

1. Models of microeconometrics     (Scripts)     [(Spoken Tutorials)]
2. Bayesian Econometrics     (Scripts)     [(Spoken Tutorials)]
3. Time series Econometrics     (Scripts)     [(Spoken Tutorials)]
4. Programming your own analysis     (Scripts)     [(Spoken Tutorials)]