pine script - How to identify the values in the array of the historical bars rather than showing "NaN"?

Question

How to let the historical bars revealing their values in the array rather than showing "NaN"?. However, when I run the replay mode, they're showing a filled array from the first bar of replaying. The image clarify what I'm referring Replay mode vs Solid mode

Answer 1

Solution!!!

// 1-3) Search for Pivots (High and Low)
PH = pivothigh(close, 5, 4)
PL = pivotlow(close, 5, 4)

// 2-3) Add Pivot Points on array.
var a = array.new_float(6)
if (not na(PH))
    array.unshift(a,PH)
else if (not na(PL))
    array.unshift(a,PL)

// 3-3) Pick-Up the most Last 6 Pivots (High and Low)
var A = array.new_float(6)
A:= array.slice(a, 0, 6)

//=== array ===
y=label.new(bar_index, close, "Pivots
A= " + tostring(A, '#.##'))
// label.delete(y[1])