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Draw a single cluster using splined curves
drawClustSpline(xpos, ytop, ybtm, color, nest.level, pad.left = 0, border = 1, col.border = NULL)
A vector of x values for control points
A vector of y values for control points on the top
A vector of y values for control points on the bottom
A color value for this shape
An integer describing how deeply this is nested
A numeric amount of extra padding to add to the left side of the shape
A numeric width of the border line around this polygon
A color for the border line
No return value, outputs on graphics device
# NOT RUN { drawClustSpline(xpos=c(0,30,75,150), ytop=c(100,51,51,99), ybtm=c(0,49,49,1), color="red", nest.level=1) # }
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