combineData {seawaveQ}

Combine water-quality sample data and continuous ancillary variables

Description

Function to combine water-quality sample data and continuous (daily) ancillary variables and drop unnecessary columns.

Usage

combineData(qwdat, cqwdat, qwcols = c("staid", "dates", "R", "P"))

Arguments

qwdat

is the dataset containing water-quality sample data with columns that begin with a P (or other user-defined indicator) followed by alphanumeric characters. These columns are concentration data. In addition there need to be columns that begin with an R (or other user- defined indicator) followed by alphanumeric characters that match those of the associated concentration data. The R columns contain data qualification codes. See example datasets for more information about the data format, IllRivValleyCty and qwMoRivOmaha. This package assumes that the data are in micrograms per liter.

cqwdat

is the dataset containing variables that can be used as explanatory variables for the seawaveQ model. See example dataset for more information about the data format cqwMoRivOmaha. These are daily values with no missing values allowed between the first and the last date in the dataset.

qwcols

is a character vector with column headings for a station (location) identifier, a dates column identifier, beginning of column headers for remarks code (default is R), and beginning of column headers for concentration data (default is P for parameter).

Format

A data frame with the number of rows equal to the number of rows in the data frame indicated by qwdat. The number of columns depend on the two input data frames. Minimally there will be a station identification column, a dates column, a column of qualification codes, and a column of water-quality data.

Value

A data frame

Note

The columns indicated by qwcols[1:2] are used to combine the datasets. The first column is the station identifier and the second column is the date column. These two column headings must be the same in the two datasets being combined and the dates in the datasets being combined must be of class Date and use the same format.

Author(s)

Karen R. Ryberg and Aldo V. Vecchia

Examples

data(swData)
MoRivOmaha <- combineData(qwdat = qwMoRivOmaha, cqwdat = cqwMoRivOmaha, 
qwcols = c("staid", "dates", "R", "P"))