TheCustom tab lets you define Metrics using customized functions. These functions can
include measures such as the sum of the number of hours of ozone exposure about 60 parts per
billion. The possibilities are quite diverse, as evidenced by the range of functions and variables
available for use in Table 4-3. However, the syntax for using these functions is somewhat
involved, so we have reserved discussion of this for the Function Editor appendix.
Seasonal Metricsallow users to aggregate daily Metric values. This has a number of uses.
For example, if pollutant values vary greatly by season, you can calculate separate pollutant
measures for each season of interest. You might be interested in dry season versus wet season,
or differences between Winter, Spring, Summer, and Fall.
To add seasonal metrics, click on theEdit button below the Seasonal Metrics box. The
Manage Seasonal Metricswindow will appear.
To add aSeasonal Metric, click on the Add button below the Seasonal Metrics box. A
default nameSeasonal Metric will appear in the box. Since the default name is not very
descriptive, it is best to change the name to something more informative such as the
QuarterlyMean. As with the Metric names, keep in mind that the Seasonal Metric names
that you use need to be consistent with the metric names that you include in your air pollution
monitoring and modeling data, as well as your health impact functions.
n251 - n252 - n253 - n254 - n255 - n256 - n257 - n258 - n259 - n260 - n261 - n262 - n263 - n264 - n265 - n266 - n267 - n268 - n269 - n270 - n271 - n272 - n273 - n274 - n275 - n276 - n277 - n278 - n279 - n280 - n281 - n282 - n283 - n284 - n285 - n286 - n287 - n288 - n289 - n290 - n291 - n292 - n293 - n294 - n295 - n296 - n297 - n298 - n299 - n300
castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD