expr correction?

[Anonymous]

avg({<period={'>$(=date($(vmaxperiod)-$(vdays))) <=$(=date($(vmaxperiod)))'} >}merticvalue/(100000))

-(minus)

avg({<period={'>$(=date($(vmaxperiod)-$(vdays))) <=$(=date($(vmaxperiod)))'} >}previousmerticvalue/(100000))

here

ex:

metricvalue:

day1,100

day2,200

day3,300

previous metric value means i want like

metric value is day1   then previous metric value is 0

metric value is day2   then previous metric value is 1

metric value is day3   then previous metric value is 2

i have only field is metricvalue   from this i have calculate prvious metric value

i have tried above function its not working

give me some idea when  metricvalue is day1 iwant prev metricvalue is 0

metricvalue is day2 iwant prev metricvalue is day1

metricvalue is day3 iwant prev metricvalue is day2

[Anonymous · Accepted solution]

got it