E-MORB, Sun-McDonough, 1989

Использовать Проверить

require('ggplot2');
 
cmp <- read.csv("constants_oceanic_basalts_compositions.csv", sep=";", stringsAsFactors=F);
 
spdgrams.ree_emorb <- function(ppm_data, el_order = NULL)
{
ns <- el_order;
 
if (is.null(el_order))
{
ns <- c('Cs', 'Rb', 'Ba', 'Th', 'U', 'Nb', 'Ta', 'La', 'Ce', 'Pb', 'Pr',
        'Sr', 'Nd', 'Zr', 'Hf', 'Sm', 'Eu', 'Gd', 'Tb', 'Dy', 'Y', 'Ho',
        'Er', 'Tm', 'Yb', 'Lu');
}
 
pmsc <- c();
 
for (n in ns)
  pmsc <- c(pmsc, subset(cmp, element == n)$E_MORB);
 
ds <- selectNames(ppm_data,c(paste0(ns,'_ppm')));
 
names(ds) <- ns;
 
ret <- c();
 
values <- cbind(ppm_data$Name, rowApply(`/`,ds,pmsc));
names(values)[1] <- 'Name';
 
ret$values <- values;
ret$grades <- ns;
ret$labels <- c('REE', 'Sample/E-MORB');
 
return(ret);
}