CODEWITHSUNDEEP
pine-script
ctwhome
ctwhome

Reputation: 834

What is the meaning of the function na() in pinescript?

I can't find nor understand the funcion na() in pinescript. In the example below, the script prints a Heikin Ashi OHLC bars for a specific custom timeframe

//@version=4
strategy("[⚡TC⚡] Heikin Ashi Timeframes", overlay=false)

higherRes =input(title="Time 1", type=input.string, defval="90")

is_newbar(res) => 
    t = time(res) 
    not na(t) and (na(t[1]) or t > t[1])

o = security(syminfo.tickerid, higherRes, open)
h = security(syminfo.tickerid, higherRes, high) 
l = security(syminfo.tickerid, higherRes, low)
c = security(syminfo.tickerid, higherRes, close)

Upvotes: 1

Views: 8585

Answers (1)

Andreas
Andreas

Reputation: 159114

If you read the documentation, you will find section "Preventing na values, functions na and nz" describing its purpose:

In addition, there is a simple function with one argument that returns a logical result called na. This function makes it possible to check if the argument is na or not. Check it out here.

The link is a description of the function:

na

Test value if it's a NaN.

na(x) → bool

na(x) → series[bool]

Returns

true if x is not a valid number (x is NaN), otherwise false.

See also

na fixnan nz

Upvotes: 2

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