CPlot:FindNearest

CPlot:FindNearest

The FindNearest method returns the plot series index of the point nearest the target coordinates (x,y).

nIndex, xPt, yPt = CPlot:FindNearest( x, y )

nIndex is the index of the nearest point, from 1 to CPlot:Count.

x is the x coordinate of the target point.

y is the y coordinate of the target point.

xPt is the x coordinate of the nearest point.

yPt is the y coordinate of the nearest point.

On failure, 0,0,0 is returned.

The following script finds the index of the point nearest coordinates (4.2,-17.1) in series 1 of a CPlotView:

V = attachlist_plotview()	-- select the target plot window
if V == nil then Exit("Bad plot") end	-- if not successful, exit the script
P = V:GetPlot(1)	-- get a CPlot object for series 1
if P == nil then Exit("Bad series") end
n, xPt, yPt = P:FindNearest( 4.2, -17.1 )	-- get index n and coordinates
Printf("Nearest: Pt[%d]=(%lg,%lg)\n", n, xPt, yPt)	-- print the result