Re: Histogram facet?
This looks nice! The only missing piece for more interactivity would be to be able to map multiple field values into the same bucket. e.g. http://localhost:8983/solr/query? q=*:* facet=true facet.field=*round(date, '15MINUTES')* facet.stat=sum(retweetCount) This is a bit similar to SOLR-4772https://issues.apache.org/jira/browse/SOLR-4772for the rounding. Then we could zoom out just by changing the size of the bucket, without any index change, e.g.: http://localhost:8983/solr/query? q=*:* facet=true facet.field=*round(date, '1HOURS')* facet.stat=sum(retweetCount) Romain On Tue, May 6, 2014 at 10:09 AM, Yonik Seeley yo...@heliosearch.com wrote: On Mon, May 5, 2014 at 6:18 PM, Romain romain@gmail.com wrote: Hi, I am trying to plot a non date field by time in order to draw an histogram showing its evolution during the week. For example, if I have a tweet index: Tweet: date retweetCount 3 tweets indexed: Tweet | Date | Retweet A01/01 100 B01/01 100 C01/02 100 If I want to plot the number of tweets by day: easy with a date range facet: Day 1: 2 Day 2: 1 But now counting the number of retweet by day is not possible natively: Day 1: 200 Day 2: 100 Check out facet functions in Heliosearch (an experimental fork of Solr): http://heliosearch.org/solr-facet-functions/ All you would need to do is add: facet.stat=sum(retweetCount) -Yonik http://heliosearch.org - solve Solr GC pauses with off-heap filters and fieldcache
Re: Histogram facet?
This is super nice, I tried (even without subfacets) and it works! Thanks a
lot!
Romain
facet=truefacet.range=pricefacet.range.start=0facet.range.end=1000facet.range.gap=100facet.stat=avg(popularity)
facets: { price: { buckets: [ { val: 0.0, avg(popularity):
3.5714285714285716 }, { val: 100.0, avg(popularity): 5.5 }, { val:
200.0, avg(popularity): 6 }, { val: 300.0, avg(popularity):
7.667 }, { val: 400.0, avg(popularity): 7 }, { val:
500.0, avg(popularity): NaN }, { val: 600.0, avg(popularity): 7},
{ val: 700.0, avg(popularity): NaN }, { val: 800.0,
avg(popularity): NaN }, { val: 900.0, avg(popularity): NaN } ],
gap: 100, start: 0, end: 1000 }
On Tue, May 6, 2014 at 3:15 PM, Yonik Seeley yo...@heliosearch.com wrote:
On Tue, May 6, 2014 at 5:30 PM, Romain Rigaux rom...@cloudera.com wrote:
This looks nice!
The only missing piece for more interactivity would be to be able to map
multiple field values into the same bucket.
e.g.
http://localhost:8983/solr/query?
q=*:*
facet=true
facet.field=*round(date, '15MINUTES')*
facet.stat=sum(retweetCount)
This is a bit similar to
SOLR-4772https://issues.apache.org/jira/browse/SOLR-4772for the
rounding.
Then we could zoom out just by changing the size of the bucket, without
any
index change, e.g.:
http://localhost:8983/solr/query?
q=*:*
facet=true
facet.field=*round(date, '1HOURS')*
facet.stat=sum(retweetCount)
For this specific example, I think map multiple field values into the
same bucket equates to a range facet?
facet.range=mydatefield
facet.range.start=...
facet.range.end=...
facet.range.gap=+1HOURS
facet.stat=sum(retweetCount)
And then if you need additional breakouts by time range, you can use
subfacets:
subfacet.mydatefield.field=mycategoryfield
That will provide retweet counts broken out by mycategoryfield for
every bucket produced by the range query.
See http://heliosearch.org/solr-subfacets/
-Yonik
http://heliosearch.org - facet functions, subfacets, off-heap
filtersfieldcache
Re: Histogram facet?
The dates won't match unless you truncate all of them to day. But then if
you want to have slots of 15minutes it won't work as you would need to
truncate the dates every 15minutes in the index.
In ES, they have 1 field to make the slots and 1 field to insert into the
bucket, e.g.:
{
query : {
match_all : {}
},
facets : {
histo1 : {
date_histogram : {
key_field : timestamp,
value_field : price,
interval : day
}
}
}
}
Romain
On Mon, May 5, 2014 at 9:05 PM, Erick Erickson erickerick...@gmail.comwrote:
Hmmm, I _think_ pivot faceting works here. One dimension would be day
and the other retweet count. The response will have the number of
retweets per day, you'd have to sum them up I suppose.
Best,
Erick
On Mon, May 5, 2014 at 3:18 PM, Romain romain@gmail.com wrote:
Hi,
I am trying to plot a non date field by time in order to draw an
histogram
showing its evolution during the week.
For example, if I have a tweet index:
Tweet:
date
retweetCount
3 tweets indexed:
Tweet | Date | Retweet
A01/01 100
B01/01 100
C01/02 100
If I want to plot the number of tweets by day: easy with a date range
facet:
Day 1: 2
Day 2: 1
But now counting the number of retweet by day is not possible natively:
Day 1: 200
Day 2: 100
On current workaround would be to do a date rage facet to get the date
slots and ask only for the retweet field and compute the sums in the
client. We could compute other stats like average, etc... too
The closest I could see was
https://issues.apache.org/jira/browse/SOLR-4772but it seems to be
slightly different.
Basically I am trying to do something very similar to the Date Histogram
Facet
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-date-histogram-facet.html#search-facets-date-histogram-facet
in
ES.
Is there a way to move the counting logic to the Solr server?
Thanks!
Romain
