standard deviation

[#1]

hi all,

i have two fields, 1st is date and 2nd is tweet id and i m counting tweet w.r.t. date.

i have average but cant find the standard deviation.

I tried using stdev, buti suppose i m doing something wrong.

Thanks

[#2]

pls put expression here what u tried

[#3]

stdev(count(tweet_id))

and also tried this

stdev(aggr(count(tweet_id)))

[#4 · Accepted solution]

try like this

stdev(aggr(count(tweet_id),date))