when you are using a ggplot you can see what factors influence do how do you get the correlation matrix? how to plot do what is the numerical factor for dissolved oxygen how to plot a time series for the data what's the correlation matrix for a time series how do you graph do for a time series how to plot daily rainfall in a time series why do I need correlation matrices in time series how can i visualize a multivariate time series? what is the ph of each categorical factor? what is the numerical factor for the daily average what is the numerical factor that influences dissolved oxygen (do)? how to show the relationship between a site and weather data how to plot the daily weather of a particular site? how to use corrplot to show seasonal variation how many numerical factors are in a time series? what factors cause daily rainfall how many numerical factors are there on a time series?