# Vega-Lite, Simple bar-chart won't work **URL:** \ **Category:** Kibana\ **Tags:** vega\ **Created:** [February 27, 2023, 4:39pm UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617 "2023-02-27T16:39:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![joerg55](https://avatars.discourse-cdn.com/v4/letter/j/ebca7d/32.png) [@joerg55](https://discuss.elastic.co/u/joerg55)\ **Post date:** [February 27, 2023, 4:39pm UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/1 "2023-02-27T16:39:00Z")
Hi community, I try to work with vega-lite-charts, unfortunatley with no success. Here is my json: ```auto { "$schema": "https://vega.github.io/schema/vega-lite/v5.json", "description": "A simple bar chart", "data": {"url": {"%context%":"true", "index":"umsatz01"} }, "mark": "bar", "encoding": { "x": {"field": "Monat", "type": "nominal", "axis": {"labelAngle": 0}}, "y": {"field": "Umsatz", "type": "quantitative"} } } ``` and the response ```auto { "took": 1, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": 9, "max_score": 1, "hits": [ { "_index": "umsatz02", "_id": "ANyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 1200, "Monat": "Jan" } }, { "_index": "umsatz02", "_id": "AdyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 1000, "Monat": "Feb" } }, { "_index": "umsatz02", "_id": "AtyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 988, "Monat": "Mrz" } }, { "_index": "umsatz02", "_id": "A9yAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 2100, "Monat": "Apr" } }, { "_index": "umsatz02", "_id": "BNyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 556, "Monat": "Mai" } }, { "_index": "umsatz02", "_id": "BdyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 889, "Monat": "Jun" } }, { "_index": "umsatz02", "_id": "BtyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 567, "Monat": "Jul" } }, { "_index": "umsatz02", "_id": "B9yAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 324, "Monat": "Aug" } }, { "_index": "umsatz02", "_id": "CNyAk4YBiCKQLGD3oToR", "_score": 1, "_source": { "Umsatz": 1258, "Monat": "Sep" } } ] } } ``` Although the data seems to be correct I get the error-message: - Infinite extent for field "Umsatz\_start": [Infinity, -Infinity] - Infinite extent for field "Umsatz\_end": [Infinity, -Infinity Somebody here, who can explain what is wrong with my chart? Thanks in advance, Joerg ---
**Author:** ![Marco\_Liberati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marco_liberati/32/82953_2.png) [@Marco\_Liberati](https://discuss.elastic.co/u/Marco_Liberati)\ **Post date:** [February 27, 2023, 5:52pm UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/2 "2023-02-27T17:52:43Z")
Hi @joerg55 welcome to the Kibana community. The main problem is that Vega cannot find the given fields. You can inspect the full Vega spec in the `Inspect` panel, within the `Vega` view. Anyway, the main problem there is that you need to specify correctly the path of both fields: ```auto { "$schema": "https://vega.github.io/schema/vega-lite/v5.json", "description": "A simple bar chart", "data": { "url": { "%context%":"true", "index":"umsatz01" } "format": {"property": "hits.hits"} }, "mark": "bar", "encoding": { "x": {"field": "_source.Monat", "type": "nominal", "axis": {"labelAngle": 0}}, "y": {"field": "_source.Umsatz", "type": "quantitative"} } } ``` ---
**Author:** ![joerg55](https://avatars.discourse-cdn.com/v4/letter/j/ebca7d/32.png) [@joerg55](https://discuss.elastic.co/u/joerg55)\ **Post date:** [February 27, 2023, 8:47pm UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/3 "2023-02-27T20:47:03Z")
thank you Marco, the chart is ok now. I think I have to use the '\_source-object' as the result of the query. I use the docu [https://vega.github.io/vega-lite/docs/](https://vega.github.io/vega-lite/docs/). But many things I can't find there. Do you have a tip for further information? Thanks again Joerg ---
**Author:** ![Marco\_Liberati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marco_liberati/32/82953_2.png) [@Marco\_Liberati](https://discuss.elastic.co/u/Marco_Liberati)\ **Post date:** [February 28, 2023, 8:35am UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/4 "2023-02-28T08:35:09Z")
You can find out here how to perform a query and how to retrieve only selected fields, rather than pass thru the `_source` object: [Retrieve selected fields from a search | Elasticsearch Guide [8.6] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-fields.html) As for the vega documentation, I'd say that page is the best starting point with full reference. What are you looking for specifically that you cannot find there? ---
**Author:** ![joerg55](https://avatars.discourse-cdn.com/v4/letter/j/ebca7d/32.png) [@joerg55](https://discuss.elastic.co/u/joerg55)\ **Post date:** [February 28, 2023, 10:29am UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/5 "2023-02-28T10:29:43Z")
One very important info for me was that i have to use the \_source-object. Thats not to find in the vega-docu (of course, because it belongs to kibana). And thats why I ask for further information. What special 'kibana-expressions' (like %context% or format) and kibana-extensions are available in the json-expression of a vega-lite-chart? By the way, the request of my 'attempt to walk-chart' ```auto { "query": { "bool": { "must": [], "filter": [], "should": [], "must_not": [] } } } ``` delivers only 10 of 12 records. Why 😭 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 28, 2023, 10:30am UTC](https://discuss.elastic.co/t/vega-lite-simple-bar-chart-wont-work/326617/6 "2023-03-28T10:30:37Z")
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