Package org.math.R

Class R2jsSession

  • All Implemented Interfaces:
    RLog
    public class R2jsSession
extends Rsession
implements RLog
    This class evaluate an R expression by parsing it in javascript expression and then evaluate the javascript expression with the Java ScriptEngine. This class uses external javascript library like mathjs to evaluate expressions. ------------------------------ Supported and unsupported syntaxes ------------------------------------------------------------------ ## Basic syntaxes - affectation (=, <-) - mathematical expression (pi, ^, **, <, <=, >, >=, !=, ==, ++, +=, -=, priority of operators, for, for in, if, else, range) ## Functions - All syntaxes of functions in R - recursive functions - Mathematical functions ("abs", "acos", "asin", "atan", "atan2", "ceil", "cos", "exp", "floor", "log", "max", "min", "round", "sin", "sqrt", "tan" ) - NOT SUPPORTED: - function with named argument (ex: "f(y=1.23,x=4.56)") (impossible to support in the ES5) - multiple functions in one command (impossible just write multiple lines) ## Arrays - definition of arrays (c(1,2,3), c(0:4), array(0.0,c(4,3))) - accessor: a[1], - operations (+, -, *, /) - function: length - NOT SUPPORTED: %*%, %/% : create matrices instead of arrays to use theses operations ## Matrices - definition of matrices with: nrow, ncol, byrow - operations (transpose, +, -, *, ^, %*%, %/%, %%) - column and row selection ([1,], [,1], [,], [c(1,2),]) - function supported: determinant, solve, dim - TO SUPPORT: eigen ## DataFrames - constructor: data.frame(first=a,second=b), data.frame('first'=a,'second'=b), data.frame(a,b) - accessor: '$', "[['element']]" NOT SUPPORTED: column extraction "[1:2,]" ## Lists - constructor: list(first=a,second=b), list('first'=a,'second'=b), list(a,b) - accessor: '$', "[['element']]" NOT SUPPORTED: column extraction "[1:2,]", accessor "[[1]]" ## R functions - write.csv - runif - save and load variables - ls - rm variables - cbind (on matrices only) - rbind (on matrices only) - file.exists - savels TO SUPPORT: rnorm, capture.output NOT SUPPORTED: toPNG, asHTML, cbind (array and dataframe), rbind (array and dataframe), multiple imbricated functions -----------------------------------------------------------------------------------------------------------------------------------
    Author:
    Nicolas Chabalier