Update README.md

README.md

 # R formation
 
-## Session 1
-Introduction to R and RStudio
-- R introduction
-- RStudio interface
-- numerical operation
-- data structure
-- functions
-- R packages
-- Examples
-
-## Session 2
-Introduction to tidyverse
-In this session we play-back the steps of the creation of an Exel table 
-
-- numerical variable creation
-- numerical operations
-- string creation
-- variable concatenation and variable type: paste0, typeof
-- vector : lenght, head, summary
-- data.frame : dim, ncol, nrow
-- matrix
-- list
-
-## session 2
-In this session we extract the list of differentially expressed genes from a
-DESeq2 .csv output. We then extract only the up-regulated and down-regulated
-genes.
-
-- load a table: read.table, read.csv
-- columns selection : boolean vector
-- lines selection : boolean vector
-- write a .csv and .Rdata file
-- path, working-directory, and .Rhistory file
-
-## session 3
-In this session we counts the nucleotides in a sequences
-
-- load .Rdata object with the sequence
-- transformation between vector and string : split
-- loop
-- simple conditional testing : if else
-- code wrapping within function
-- script
-
-## session n
-Conversion of a fasta file into a GTF file
-- list as hashing table
-- regexp
-
-## session n+1
-Converting a nucleotide sequence into a protein sequence
-- load codon to AA table
-- build conversion function between codon and AA
-- build conversion function for a sequence function 
-- use list as hashing table
-
-
+## program