Sounds like an oxymoron: documented undocumented features. -tk
On Mon, Feb 4, 2019 at 6:25 AM Andrew Milner <[email protected]> wrote: > Tom > It would be lovely to have all the undocumented, unsupported, untested > gems gathered together somewhere - so that at least they are recorded in > one place!!!!! > > > > On Monday, 4 February 2019 15:37:50 UTC+2, Thomas Keffer wrote: >> >> The $current object has an undocumented feature that allows a timestamp >> to be specified. It looks something like this (NOT TESTED): >> >> #set $yesterday=$current.dateTime.raw - 86400 >> <p>The temperature 24 hours ago was >> $current(timestamp=$yesterday).outTemp </p> >> >> Because a timestamp 24 hours ago may not fall precisely on when a record >> is available, the feature also allows a "max delta" to be specified. A >> record that falls within max_delta is considered "good enough." So, if >> you're willing to accept anything within 10 minutes, the template would >> look like: >> >> <p>The temperature approximately 24 hours ago was >> $current(timestamp=$yesterday, max_delta=600).outTemp </p> >> >> Note that this is undocumented, unsupported, and untested. It's a little >> clumsy, so it's also likely to change at some future point. Still, I'd be >> interested in your experience using it. >> >> -tk >> >> On Mon, Feb 4, 2019 at 5:08 AM phopwooduk via weewx-user < >> [email protected]> wrote: >> >>> Hi, >>> >>> >>> >>> I am new here and this is my first post. >>> >>> >>> >>> I am using a modified version of the NeoWx skin, I would like to show >>> Temperature at this time yesterday. I can see there are methods for >>> showing aggregation of values min, max etc in the past. But I can only see >>> how to get down to a resolution of 1 hour. >>> >>> >>> >>> So the question is, is it possible to show the temperature this time 24 >>> hours ago, or the nearest value to 24 hours ago, if it is possible how >>> would I do this. >>> >>> >>> >>> All the best. >>> >>> Peter >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "weewx-user" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
