This function decides where the legend should be put (top left or bottom left)
Usage
placeLegend(wv_1, low_n, high_n)
Arguments
wv_1
A double that indicates the first value of wv.empir
low_n
A doble that indicates the last value of ci.low
high_n
A dobule that indicates the last value of ci.high
Value
A numeric vector containing 4 elements. The first two elements indicate legend.justification, the last two elements indicate legend.position (see ?theme).