updated and simplified example window function in flux function list
updated and simplified example window function in flux function list

li-ang/influxdb,nooproblem/influxdb,influxdata/influxdb,influxdb/influxdb,nooproblem/influxdb,li-ang/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdb/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdata/influxdb