I have this query (a modified version of the query under the Line Chart section of the Datalab Tutorials notebook.)
`%%sql --module timeseries
SELECT HOUR(timestamp) AS timestamp, AVG(latency) AS latency,
FROM [cloud-datalab-samples:httplogs.logs_20140615]
WHERE endpoint = 'Popular'
GROUP BY timestamp`
followed by this call to %%chart
%%chart bars --fields timestamp,latency --data timeseries
but this doesn't seem to draw the required bar chart, even though I do not receive any error message. Am I missing something?