:- use_module(library(lists)). % member/2. :- use_module(library(readutil)). % read_line_to_codes/2. :- nl, nl. :- ( r_bin(Rbin) -> write( 'Will be using the R found at: ' ), nl, write( Rbin ), nl, nl ; write( 'This session cannot locate an R executable. Please register the location' ), nl, write( 'of the R executalbe using r_bin/1 before you can run the demos.' ), nl, nl ). :- write( 'Demo predicates for R (r_session) package.' ), nl. :- write( 'See r_demo_1/0,...,r_demo_10/0.' ), nl. :- write( 'The goal r_demo/0 is a shorthand for r_demo_1/0,...,r_demo_7/0 which are the main demos.' ), nl, nl. :- write( 'r_demo_all/0 and r_demo_clauses/0 for r_demo_1,...,r_demo_10.' ), nl. :- write( 'which include demos for some non-basic features.' ), nl. :- write( 'You need to look at the sources before running r_demo_8,9 and 10.' ). :- nl, nl. r_demo :- nl, nl, Rdemos = [r_demo_1,r_demo_2,r_demo_3,r_demo_4,r_demo_5,r_demo_6,r_demo_7], r_demo( Rdemos, false ). r_demo_all:- nl, nl, Rdemos = [r_demo_1,r_demo_2,r_demo_3,r_demo_4,r_demo_5,r_demo_6,r_demo_7,r_demo_8,r_demo_9,r_demo_10], r_demo( Rdemos, false ). r_demo_clauses :- nl, nl, Rdemos = [r_demo_1,r_demo_2,r_demo_3,r_demo_4,r_demo_5,r_demo_6,r_demo_7,r_demo_8,r_demo_9,r_demo_10], r_demo( Rdemos, true ). r_demo( Rdemos, Clauses ) :- member(Wh, Rdemos ), write( doing-Wh ), nl, ( Clauses == true -> write( 'Clauses: ' ), nl, findall( Wh-Body, (clause(Wh,Body), portray_clause((Wh:-Body)), nl), _ ) ; true ), ( call(Wh) -> true ; write( 'Demo ended with failure.' ), nl ), nl, nl, fail. r_demo( _Rdemos, _ ) :- write( done ), nl. r_demo_1 :- write( 'Demo: basic vector interactions.' ), nl, nl, r_open, r_in( x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), ( r_out( print(x), Lines ), r_lines_print( Lines ), fail; true ), r_print( x ), r_in( x ), r_in( (y <- c(6,5,4,3,2,1); y) ), % The extra paranthesis are only % needed for Yap. r_in( Z <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), write( z(Z) ), nl, r_close. r_demo_2 :- write( 'Demo: plots (screen and postscript).' ), nl, nl, r_open, r_in( y <- rnorm(50) ), r_print( y ), r_in( Y <- y ), write( y(Y) ), nl, r_in( x <- rnorm(y) ), r_print( x ), r_in( X <- x ), write( x(X) ), nl, r_in( x11(width=5,height=3.5) ), r_in( plot(x,y)), write( 'Press Return to continue...' ), nl, current_prolog_flag( version, V ), ( integer(V) -> User = current_input % SWI Prolog ; User = user ), read_line_to_codes( User, _ ), r_in( 'dev.off()' ), r_in( 'postscript(file="x_vs_y.eps")' ), r_in( plot(x,y)), r_in( 'dev.off()' ), r_close, !, % Swi leaves a backtracking point at read_line_to_codes/2 write( 'Check that file x_vs_y.eps has been created.' ), nl. r_demo_3 :- write( 'Demo: aliases.' ), nl, nl, r_open( [alias(mamonaku)] ), ( current_r_session(Alias),write(session(Alias)),nl, fail; true ), r_in( mamonaku, x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), r_print( mamonaku, x ), r_close( mamonaku ). r_demo_4 :- write( 'Demo: history.' ), nl, nl, r_open, ( r_history(A,B), write(history(A,B)), nl, fail; true ), r_in( x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), ( r_out( print(x), Lines ), r_lines_print( Lines ), fail; true ), r_print( x ), ( r_history(C,D), write(h(C,D)), nl, fail; true ), r_close. r_demo_5 :- write( 'Demo: calls to R functions.' ), nl, nl, r_open, r_in( i <- 0:14 ), r_print( i ), r_in( I <- i ), write( 'I'(I) ), nl, r_in( x <- i/10 ), r_in( y <- c(176.547,194.2552,218.5462,441.3706,795.786,1190.8606,1321.0128,1326.4694,1437.3068,1364.6906,1343.768,1513.7298,1553.8264,1554.1748,1549.399) ), r_print( (integrate(splinefun(x,y), 0.2, 0.4)) ), r_close. r_demo_6 :- write( 'Demo: copying output and error on to file.' ), nl, nl, r_open( [copy('rec_both.txt',both)] ), r_in( x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), r_print( x ), write( 'Check that file rec_both.txt has been created.' ), nl, r_close. r_demo_7 :- write( 'Demo: error on R.' ), nl, nl, r_open( [at_r_halt(restart)] ), r_in( x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), r_print( x ), r_print( y ), r_print( x ), r_close. %%% Cut-off r_demo_8 :- write( 'Demo: reinstate on halt.' ), nl, write( 'This is no longer valid.' ), nl, nl, r_open( [at_r_halt(reinstate)] ), r_in( x <- c(10.4, 5.6, 3.1, 6.4, 21.7) ), r_print( y ), % here slave dies % and r_session tries to restar_demo it and replay all commands. r_print( x ), % succeeds r_close. /* change 192.168.0.* to a host in your domain before running the following. */ r_demo_9 :- write( 'Demo: ssh on a machine with R on a different location.' ), nl, nl, r_open( [ssh('192.168.0.3')] ), r_in( I <- 0:14 ), write( 'I'(I) ), nl, r_close. r_demo_10 :- write( 'Demo: ssh on a machine with explicit set of the remote R location.' ), nl, nl, r_bin( '/usr/local/users/nicos/local/bin/R' ), r_open( [ssh('192.168.0.3')] ), r_in( I <- 0:14 ), write( 'I'(I) ), nl, r_close. /* % You can replace any of the above r_open/0,1, with one of the following r_open( [with(restore)] ). % do not use --no-restore on the R flags r_open( [copy(copied,both)] ). % copy both input and output to file copied r_open( [at_r_halt(restar_demo),alias(mamunaku),copy(copied_in,in)] ). % copy input to file copied_in r_open( [at_r_halt(restar_demo),alias(mamunaku),copy(copy_out,out)] ). % copy output to file copied_out */