Summary of water quality data collected by the Mystic River Watershed Association in the lower basin.

Exploratory data analysis of Malden River WQ data for Mystic River Watershed Association

Exploration of the dams package.

Plots of hourly precipitation and streamflow during storm events.

Using ggmap to plot stations based on data frame with lat/lon

Some notes about dealing with datetimes and the effect of timezones on parsing and merging data.

How to compute significance tests for temporal trends of multiple time series, and summarize the resulting magnitude and significance of trend slopes.

Tutorial showing how to 1) load a flow dataset from a csv file 2) parse the date column 3) extract month, year and julian day 4) plot data as time series and boxplots

How to use the split-apply-combine strategy to compute the correlation between two parameters for multiple subsets of a data frame.