How can I calculate Average in Nifi?

Question

How can I calculate the average of an attribute in nifi ? I am using the UpdateAttribute processor. I have 4 attributes that should be added and divide by 4 but how can I perform that in nifi?

Answer 1

I have assumptions that you have 4 attributes from EvaluateJsonPath processor:

• temp: $.main['temp']
• fl: $.main['feels_like']
• tmin: $.main['temp_min']
• tmax: $.main['temp_max']

Average attribute in UpdateAttribute processor:

• average: ${temp:toNumber():plus(${fl:toNumber():plus(${tmin:toNumber():plus(${tmax:toNumber()})})}):divide(4)}