Scripting in histogram

[zixicc]

hi.
in the date_histogram, the value_script is doc['record'].value
I get the partial result

{
"time" : 1383264000000,
"count" : 1059,
"min" : 0.008,
"max" : 12.607999999998452,
"total" : 6771.335999999965,
"total_count" : 1059,
"mean" : 6.3940849858356605
}

Is there a way to get the increment of the field 'record' during the time range and show the change in the graphs?
thanks

[rashidkpc]

There is now a derivative mode in the histogram that supports this. it does not require scripting.