Created question in FIWARE Q/A platform on 15-09-2019 at 20:09
Please, ANSWER this question AT https://stackoverflow.com/questions/57947258/how-to-calculate-max-in-sth-comet

Question:
How to calculate max in sth-comet?

Description:
sth-comet offers the possibility of calculate max, min and other functions, as described [here]https://github.com/telefonicaid/fiware-sth-comet/blob/master/doc/manuals/aggregated-data-retrieval.md

But I have tried different types and it doesn't gives the aggregated result.

A simplified version of my entity (I use the attribute temperature in this example) is:

{
"id": "Beach:27",
"type": "Beach",
"flag":

,
"temperature":

I have make this query that should give the maximum value:

http://sth-comet/STH/v1/contextEntities/type/Beach/id/Beach:27/attributes/temperature?aggrMethod=max&hLimit=100&hOffset=0

but the result is not the max but all the changes of the attribute:

{
"contextResponses": [
{
"contextElement": {
"attributes": [
{
"name": "temperature",
"values": [

,

,

]
}
],
"id": "Beach:27",
"isPattern": false,
"type": "Beach"
},
"statusCode":

}
]
}

Which is the type that the property must have to work correctly? I tried "Number", "integer","string", "Property" but I don't obtain the "max" value.

Thank you for your time