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In most cases, the number of data points available outnumbers the maximum number that can be shown on screen. To overcome this, the data is aggregated using one of 4 available methods: average, max, min, and sum.
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#### Metrics
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{: #jmetrics}
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{: #metrics}
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The metric is the main focus of the graph. You can find the list of metrics available to you in the [Metrics Summary](https://app.datadoghq.com/metric/summary). Click on any metric to see more detail about that metric, including the type of data collected, units, tags, hosts, and more.
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#### Scope
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{: #jscope}
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{: #scope}
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A scope lets you filter a Series. It can be a host, a device on a host
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or any arbitrary tag you can think of that contains only alphanumeric
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* (wildcard for everything)
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#### Groups
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{: #jgroups}
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{: #groups}
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For any given metric, data may come from a number of hosts. The data will normally be aggregated from all these hosts to a single value for each time slot. If you wish to split this out, you can by any tag. To include a data point seperated out by each host, use {host} for your group.
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#### Arithmetic
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{: #jmath}
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{: #math}
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You can apply simple arithmetic to a Series (+, -, * and /). In this
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example we graph 5-minute load and its double:
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### Events
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{: #jevents}
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{: #events}
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You can overlay any event from Datadog. The general format is:
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@@ -750,7 +750,7 @@ or if you're looking to display all errors:
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### Visualization
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{: #jviz}
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{: #viz}
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Data can be visualized in a few different ways:
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Instead of one query per chart you can aggregate all queries into one and simply concatenate the queries.
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#### Slice-n-Stack
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{: #jslice}
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{: #slice}
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A useful visualization is to represent a metric shared across
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hosts and stack the results. For instance, when selecting a tag that
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### Y-Axis Controls
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{: #jyaxis}
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{: #yaxis}
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The Datadog y-axis controls (currently just via the JSON editor) allow you to:
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<ul>
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}
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#### Filtering
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{: #jfilter}
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{: #filter}
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Filter configuration allows you to automatically change y-axis bounds based on a
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threshold. Thresholds can be a percentage or an absolute value, and it can apply to
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#### Examples
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{: #jexamples}
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{: #examples}
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Here is an example using the <code>rate()</code> function, which takes only a single metric as a parameter. Other functions, with the exception of <code>top()</code> and <code>top_offset()</code>, have identical syntax.
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