Class WqData
Class WqData
A simple extension or subclass of the "data.frame" class for typical
“discrete” water quality monitoring programs that examine phenomena
on a time scale of days or longer. It requires water quality data to be in a
specific “long” format, although a generating function
wqData can be used for different forms of data.
Objects can be created by calls of the form
new("WqData", d), where d is a data.frame. d should
have columns named time, site, depth, variable, value of class
"DateTime", "factor", "numeric", "factor", "numeric", respectively.
showClass("WqData")
# Construct the WqData object sfb as shown in the wqData examples.
sfb <- wqData(sfbay, c(1,3,4), 5:12, site.order = TRUE, type = "wide",
time.format = "%m/%d/%Y")
# Summarize the data
summary(sfb)
# Create boxplot summary of data
plot(sfb, vars = c('chl', 'dox', 'spm'), num.col = 2)
# Extract some of the data as a WqData object
sfb[1:10,] # first 10 observations
sfb[sfb$depth==20,] # all observations at 20 mPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.