CPlot:FindNearestY

CPlot:FindNearestY

The FindNearestY method returns the plot series index of the point with y coordinate nearest a target y value.

nIndex, yPt = CPlot:FindNearestY( y )

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

y is the y coordinate of the target point.

yPt is the y coordinate of the nearest point.

On failure, 0,0 is returned.

The following script finds the index of the point with y coordinate nearest -17.1 in series 1 of a CPlotView:

V = attachlist_plotview()	-- select the target plot window
if V == nil then Exit() 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
nTargY = -17.1	-- find the point nearest y=-17.1
n, yPt = P:FindNearestY( nTargY )	-- get index n and value y
Printf("Nearest: Pt[%d]=%lg\n", nTargY, n, yPt)	-- print the result