loads a csv file containing only numerical values without missing values and organized as a matrix
x_div = dcsv2div('mycsvdata',(field),(separator));
the name of the file (a string); this file contains a matrix of numerical values
field separator (optionnal)
by default: semi-column ';'
decimal separator (optionnal)
by default: comma ',' or dot '.'
a Div structure containing the numerical data of mycsvdata