Cumulated bars

[Invisible Man]

Hello,

In Weewx, is it possible to generate a graph with cumulated bars? For example, for year's rain, you'd see rain in January, then rain of January + February, then rain of January + February + March etc.

In skin.conf,  I see this config. But tweaking the aggregate interval won't help me, because it won't sum the previous months... And plot_type only has bar, line or vector available.

So, is this possible ?

Thanks

[[[yearrain]]]
            yscale = None, None, 0.02
            plot_type = bar
            [[[[rain]]]]
                aggregate_type = sum
                # aggregate_interval = 2629800 # Magic number: the length of a nominal month
                aggregate_interval = 604800    # == 1 week
                label = Rain (weekly total)

[Tom Keffer]

Try 

 aggregate_type = cumulative

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[Invisible Man]

Hmmm... looks like it doesn't change anything... ?

       [[[yearrain]]]
            yscale = None, None, 0.02
            plot_type = bar
            [[[[rain]]]]

                aggregate_type = cumulative

                # aggregate_interval = 2629800 # Magic number: the length of a nominal month
                aggregate_interval = 604800    # == 1 week
                label = Rain (weekly total)

[Tom Keffer]

Are you sure you are looking at a new image? Images do not get refreshed any longer than their aggregation interval, which, in this case, would be once a week.

Delete the image, wait for the next reporting cycle.

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[Invisible Man]

It works ! Indeed it had not been refreshed !

Now next question : the year grouping is for the last 12 months. Is there a way to get only data for a given year ?, e.g 2020. So if I'm in October, that'll be only 10 months of cumulated data.

[Tom Keffer]

No. You'd have to either create a WeeWX extension that calculates year-to-date rain and puts it in the database as a separate type, or create an xtypes extension.

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[Invisible Man]

Ok thanks again for your very precise answers!

-- Axelle