Basic R utilities used in many packages and functions, such as date and string manipulations, statistical distributions, geometry of lines and distances. The R package date is required for the two data functions.
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Function Description: are.ptsinsideChecks many points (dataframe pt with x and y) against a single quadrat whose corners are given by as xlo, ylo, xhi, yhi. It returns a logical vector, TRUE for the points inside. This is same as insideRectange, but accepting input as a matrix pts and a single vector of the four corners of the rectange.