Array.indicesCore()
These functions operate on array locations and values to create contours and other interesting operations. Array Indices and XY Functions
Array.indicesCore(UserValuesAtFlag,Function,SubtractByArray,ScaleByArray,DoNotShowIndices,RowArray)
Same as Array.indices() but the first parameter UserValuesAtFlag [default false] specifies whether to use the values or location (x,y).