screen.frames.internal: Internal wrapper for creating trend and change-point plots
In FlowScreen: Daily Streamflow Trend and Change Point Screening

Internal wrapper for creating trend and change-point plots

1 2	screen.frames.internal(input, mparam, mylab, DataType, maf, mmar, text, xaxis, Year1, YearEnd, hyrstart)

`input`	metric time series
`mparam`	trend and change point info
`mylab`	y axis label
`DataType`	numeric indicating data type
`maf`	mean annual flow series
`mmar`	plot margins
`text`	boolean indicating whether to add text
`xaxis`	boolean indicating whether to plot the x axis
`Year1`	start year of original time series
`YearEnd`	end year of original time series
`hyrstart`	numeric indicating month for start of the hydrologic year