hi and welcome to another training video
from xmpro
this is an advanced video on how to use
the chart
specifically around panning zooming and
aggregation
i have here a chart with a lot of data
points
i would like to be able to zoom to get
more detail
to do this you can go to appearance
in the block properties and then check
enable pan and zoom
this will create a bar at the top and if
you scroll up
then it will zoom in
and if you scroll down it will zoom out
you can pan by clicking on the bar in
the top
and moving it left or right
now as you can see some of these points
are very close together
and we might not want to get all of
these points
as it will slow the chart down
to deal with this you can use
aggregation
aggregation is applied per series so go
into the series settings
and then go down to aggregation and
choose one of the aggregation
formulas average will average out the
points in a given range
count will count the number of entries
in a given range
max will get the maximum value in a
given range
min will get the minimum value and some
will add up all the values
this could be useful for bar charts i'm
going to choose average
and then apply save and launch
and now as you can see the dots are
separated by a specific amount
for each and they will be averaging all
the points
that appear between them so if i zoom in
on this little section here as soon as i
zoom in more than a certain amount
it gets more of the points
and then if i zoom in even more it'll
get more points
and if i zoom in even further
then you'll be able to see that these
points here
go up and then down and then up and then
down but if i scroll
scroll out a little bit more the points
are all flat
as it is averaging out the starter
so you do lose a little bit of fidelity
in exchange for
more performance this has been how to
use the chart
pan zoom and aggregation
