qw: qw, qw2 and qwBATCH
In iembry-USGS/ie2misc: Irucka Embry's Miscellaneous USGS Functions

Description Usage Arguments Details Value Source Examples

qw, qw2 and qwBATCH process raw QW files. The QW files can contain "selected water-quality data for stations in the U.S. Geological Survey (USGS) National Water Information System (NWIS) water-quality database. The data you have secured from the USGS NWISWeb database may include data that have not received Director's approval and as such are provisional and subject to revision."

qw(file = tk_choose.files(default = "", caption =
  "Select file(s) to open & hold down Ctrl to choose more than 1 file", multi =
  TRUE, filters = matrix(c("QW file", "*", "QW file", ".rdb", "QW file",
  ".RDB"), 6, 2, byrow = TRUE)), interactive = TRUE, overwrite = TRUE)

qwBATCH(path = tk_choose.dir(caption = "Select directory with the QW files"),
  pattern = "*.rdb", overwrite = TRUE)

qw2(file, overwrite = TRUE)

`file`	Input QW file(s) to be selected through a file dialog.
`interactive`	If interactive is `TRUE`, then the user will select the filenames(s) to use for saving with the file dialog. In order to select more than one file, the user must hold down the Ctrl (Control) button while mouse clicking the chosen files. If interactive is `FALSE`, then the user will select the directory, via the directory dialog, to use for saving and the original filenames will be used.
`overwrite`	If `TRUE`, overwrite any existing spreadsheet.
`path`	Directory path of QW files to be selected through a directory dialog. The user will be asked where to find the QW files & then the user will be asked where to save the QW .xlsx files.
`pattern`	The default pattern is `.rdb` (the filename has the .rdb extension). This pattern can be changed by `qwBATCH(pattern = "pattern")`.

qw function opens a single or multiple raw, QW file(s) to modify the format and then exports the file(s) in .xlsx format. This is done for a single file or multiple files that the user selects with a file dialog.

qw2 function opens a single QW file to modify the format and then exports the file in .xlsx format. This is done for a single file that the user selects without a file dialog.

qwBATCH function opens raw QW files, from a directory, to modify the format and then exports the files in .xlsx format. This is done in a BATCH mode (whole directory of QW files) using a directory dialog.

qw, qw2 and qwBATCH functions perform the same processes on the raw QW files: 1) remove the first row, 2) create a single column with the Date and Time rather than 2 separate Date and Time columns (if needed), and 3) exports the QW file as a spreadsheet with three sheets (sheet1 corrects the timezones for Daylight Savings Times, sheet2 includes everything except for the meta data, and sheet3 provides the meta data from the top of the file). The supported US timezones are the following: Eastern, Central, Mountain, Pacific, Alaska, Hawai'i, and Atlantic (Puerto Rico and US Virgin Islands).

QW .xlsx file(s).

r - How can I check if a file is empty? - Stack Overflow answered by Konrad Rudolph and edited by Geekuna Matata on Apr 23 2014. See http://stackoverflow.com/questions/23254002/how-can-i-check-if-a-file-is-empty.
r - Better error message for stopifnot? - Stack Overflow answered by Andrie on Dec 1 2011. See http://stackoverflow.com/questions/8343509/better-error-message-for-stopifnot.
RDocumentation: TclInterface tcltk. See http://www.rdocumentation.org/packages/tcltk/versions/3.3.1/topics/TclInterface.
James Wettenhall & Philippe Grosjean, File Open/Save dialogs in R tcltk, December 01, 2015. See http://www.sciviews.org/recipes/tcltk/TclTk-file-open-save-dialogs/.
r - read csv files and perform function, then bind together - Stack Overflow answered by bjoseph on Jan 8 2015. See http://stackoverflow.com/questions/27846715/read-csv-files-and-perform-function-then-bind-together.
r - Convert column classes in data.table - Stack Overflow answered by Matt Dowle on Dec 27 2013. See http://stackoverflow.com/questions/7813578/convert-column-classes-in-data-table.
Does column exist and how to rearrange columns in R data frame - Stack Overflow answered and edited by Peter McMahan on Aug 2 2009. See http://stackoverflow.com/questions/1177919/does-column-exist-and-how-to-rearrange-columns-in-r-data-frame.
time - Dealing with timestamps in R - Stack Overflow answered by Dirk Eddelbuettel on Dec 26 2009. See http://stackoverflow.com/questions/1962278/dealing-with-timestamps-in-r/1962336.
R help - How to change the default Date format for write.csv function? answered by William Dunlap on Dec 28, 2009. See http://r.789695.n4.nabble.com/How-to-change-the-default-Date-format-for-write-csv-function-td989826.html.
RDocumentation: strptime base. See http://www.rdocumentation.org/packages/base/versions/3.3.1/topics/strptime.
National Water Information System: Help System Time Zone Codes. See http://help.waterdata.usgs.gov/code/tz_query?fmt=html.
multiple output filenames in R - Stack Overflow asked and edited by Gabelins on Feb 1 2013. See http://stackoverflow.com/questions/14651594/multiple-output-filenames-in-r.
r - Regex return file name, remove path and file extension - Stack Overflow answered and edited by Ananda Mahto on Feb 25 2013. See http://stackoverflow.com/questions/15073753/regex-return-file-name-remove-path-and-file-extension/15073919.
warnings - How do I get rid of the NOTE's generated by R CMD check when using for example ddply in my package? - Stack Overflow answered by shadow on Mar 4 2015 and edited by shadow on Mar 5 2015. See https://stackoverflow.com/questions/28851812/how-do-i-get-rid-of-the-notes-generated-by-r-cmd-check-when-using-for-example-d.
trinker/qdapRegex - dictionary_maintenance.R. See https://github.com/trinker/qdapRegex/blob/master/inst/dictionary_maintenance.R.
excel - Interconverting POSIXct and numeric in R - Stack Overflow by LauraS on May 6 2016. See http://stackoverflow.com/questions/37078772/interconverting-posixct-and-numeric-in-r.
convert date and time string to POSIX in R - Stack Overflow commented by cryo111 on Sep 18 2013. See http://stackoverflow.com/questions/18874400/convert-date-and-time-string-to-posix-in-r/18874863.

## Not run: 
library(ie2misc)
# Examples to change (an) QW file(s) interactively and non-interactively
file1 <- "http://waterdata.usgs.gov/nwis/dv?cb_00060=on&format=rdb&site_no=03584500"
file2 <- "&period=&begin_date=1904-07-01&end_date=2016-06-22"
file3 <- paste0(file1, file2) # used to truncate the file name
qw2(file3)
# USGS 03584500 ELK RIVER NEAR PROSPECT, TN
# Discharge, cubic feet per second (Mean)



qw() # default where interactive = TRUE
# Follow the file dialog instructions


qw(interactive = FALSE)
# Follow the file dialog instructions


# Example to change QW files in batch mode
qwBATCH()
# Follow the file dialog instructions

## End(Not run)