diff --git a/R/retrieveNWISData.r b/R/retrieveNWISData.r
index b003fd98fb385c6a14c3095a577b60027f14738a..fe1288743015113045733a966901c57f9b7ca35b 100644
--- a/R/retrieveNWISData.r
+++ b/R/retrieveNWISData.r
@@ -5,10 +5,10 @@
 #' A list of statistic codes can be found here: \url{http://help.waterdata.usgs.gov/code/stat_code_query?fmt=html}
 #'
 #' @param siteNumber string USGS site number.  This is usually an 8 digit number
-#' @param ParameterCd string or vector of USGS parameter code.  This is usually an 5 digit number..
-#' @param StartDate string starting date for data retrieval in the form YYYY-MM-DD.
-#' @param EndDate string ending date for data retrieval in the form YYYY-MM-DD.
-#' @param StatCd string USGS statistic code. This is usually 5 digits.  Daily mean (00003) is the default.
+#' @param parameterCd string or vector of USGS parameter code.  This is usually an 5 digit number..
+#' @param startDate string starting date for data retrieval in the form YYYY-MM-DD.
+#' @param endDate string ending date for data retrieval in the form YYYY-MM-DD.
+#' @param statCd string USGS statistic code. This is usually 5 digits.  Daily mean (00003) is the default.
 #' @param format string, can be 'tsv' or 'xml', and is only applicable for daily and unit value requests.  'tsv' returns results faster, but there is a possiblitiy that an incomplete file is returned without warning. XML is slower, 
 #' but will offer a warning if the file was incomplete (for example, if there was a momentary problem with the internet connection). It is possible to safely use the 'tsv' option, 
 #' but the user must carefully check the results to see if the data returns matches what is expected. The default is 'tsv'.
@@ -23,12 +23,12 @@
 #' endDate <- '2012-06-30'
 #' pCode <- '00060'
 #' rawDailyQ <- retrieveNWISdvData(siteNumber,pCode, startDate, endDate)
-#' rawDailyTemperature <- retrieveNWISdvData(siteNumber,'00010', startDate, endDate, StatCd='00001')
-#' rawDailyTemperatureTSV <- retrieveNWISdvData(siteNumber,'00010', startDate, endDate, StatCd='00001',format='tsv')
-#' rawDailyQAndTempMeanMax <- retrieveNWISdvData(siteNumber,c('00010','00060'), startDate, endDate, StatCd=c('00001','00003'))
-retrieveNWISdvData <- function (siteNumber,ParameterCd,StartDate,EndDate,StatCd="00003",format="tsv",interactive=TRUE){  
+#' rawDailyTemperature <- retrieveNWISdvData(siteNumber,'00010', startDate, endDate, statCd='00001')
+#' rawDailyTemperatureTSV <- retrieveNWISdvData(siteNumber,'00010', startDate, endDate, statCd='00001',format='tsv')
+#' rawDailyQAndTempMeanMax <- retrieveNWISdvData(siteNumber,c('00010','00060'), startDate, endDate, statCd=c('00001','00003'))
+retrieveNWISdvData <- function (siteNumber,parameterCd,startDate,endDate,statCd="00003",format="tsv",interactive=TRUE){  
   
-  url <- constructNWISURL(siteNumber,ParameterCd,StartDate,EndDate,"dv",statCd=StatCd,format=format,interactive=interactive)
+  url <- constructNWISURL(siteNumber,parameterCd,startDate,endDate,"dv",statCd=statCd,format=format,interactive=interactive)
   
   if (format == "xml") {
     data <- getWaterML1Data(url)