RtPlot expects the data in the file to be ordered in one or more columns. The columns
may be delimited either by whitespaces or a comma (CSV). A column which is not being
displayed may contain non numeric data as well. Lines starting with # are considered as
comments. If "NaN" or "nan" are the first 3 characters of a line, the points preceding
and following that line are not connected. The following examples are valid
for display in RtPlot:
#Columns separated by spaces
0.0 1.0
1.0 2.0
2.0 3.0
#Columns separated by comma
0.0,1.0,2.0
1.0,2.0,3.0
2.0,3.0,4.0
#Columns separated by comma with missing data
0.0,1.0,,3.0
1.0,,3.0,4.0
2.0,3.0,,5.0
#Some columns containing non-numeric data
0.0,HELLO,,3.0
1.0,,WORLD,4.0
2.0,3.0,,5.0
#Second and third data points are not connected
0.0 0.0
1.0 1.0
NaN
0.0 1.0
1.0 0.0
Numeric data can be represented as integers and fixed or floating point numbers.