Example: Point Filter Example

Example: Point Filter Example

Overview

The "filter" section of a Watchr config file provides a convenient way to selectively filter "bad" points that have already entered the database of previously-parsed data files.

Watchr Config: config.json

{
    "plots" : {
        "files" : {
            "fileName": "performance_*",
            "type" : "json"
        },
        "plot" : [
            {
                "name" : "Point Filter Plot",
                "dataLines" : [
                    {
                        "name" : "Data Line",
                        "x" : {
                            "getPath": "performance-reports/*",
                            "getKey" : "date",
                            "unit" : "date",
                            "strategy" : {
                                "getFirstMatchOnly" : "false"
                            }
                        },
                        "y" : {
                            "getPath": "performance-reports/*",
                            "getKey" : "measurement",
                            "unit" : "seconds",
                            "strategy" : {
                                "getFirstMatchOnly" : "false",
                                "iterateWith" : "x"
                            }
                        }
                    }
                ],
                "filter": {
                    "x": [ "2021-04-07T22:21:21" ],
                    "y": [ "-1.0" ]
                }
            }
        ]
    }
}

Data File: performance_data.json

{
    "performance-reports" : [
        {
            "date" : "2021-04-05T22:21:21",
            "measurement" : "1.0"
        },
        {
            "date" : "2021-04-06T22:21:21",
            "measurement" : "2.0"
        },
        {
            "date" : "2021-04-07T22:21:21",
            "measurement" : "3.0"
        },
        {
            "date" : "2021-04-08T22:21:21",
            "measurement" : "4.0"
        },
        {
            "date" : "2021-04-09T22:21:21",
            "measurement" : "1.0"
        },
        {
            "date" : "2021-04-10T22:21:21",
            "measurement" : "-1.0"
        }
    ]
}

What this example demonstrates:

• The "filter" section - A filter section contains two JSON arrays - "x" and "y", for filtering x and y data points respectively. In this example, all data points where the x value equals "2021-04-07T22:21:21" will be hidden from view. Likewise, all data points where the y value equals "-1.0" will be hidden from view.

Command Line:

watchr config.json performance_data.json