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Takes a list of points and returns the alpha shape. Create the perimeter image with CSV2Image.

Component wiki

Version 1.1
Bundle anima
Categories Data Analysis
Authors Ville Rantanen (ville.rantanen@helsinki.fi)
Issue tracker View/Report issues
Requires R ; alphahull (R-package)
Source files component.xml as.r
Usage Example with default values


Name Type Mandatory Description
in CSV Mandatory A CSV file of coordinates and a label for image name. (e.g. from ImageLocalMaxima component)


Name Type Description
out CSV Resulting linked list of edge coordinate points.


Name Type Default Description
alpha float 10 Alpha shape radius
cCols string "X,Y" Comma separated list of column names for point coordinates. The first is always assumed to be horizontal direction. Only 2D supported.
lCol string "File" Column name for file name (or label)

Test cases

Test case Parameters IN
case1_normal (missing) in out

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