Translate wide output format (e.g. from ode) into long format
# S3 method for data.frame
wide2long(out, keep = 1, na.rm = FALSE)data.frame or matrix or list of matrices in wide format
Index vector, the columns to keep
Logical, if TRUE, missing values are removed in the long format.
data.frame in long format, i.e. columns "time" (out[,1]), "name" (colnames(out[,-1])), "value" (out[,-1]) and, if out was a list, "condition" (names(out))
The function assumes that out[,1] represents a time-like vector whereas out[,-1] represents the values. Useful for plotting with ggplot. If a list is supplied, the names of the list are added as extra column names "condition"