sensors.json

{
    "generators": [
        {
            "table": "sensors",
            "vars": {
                "id": {
                    "_gen": "oneOf",
                    "choices": ["sensor-1", "sensor-2", "sensor-3", "sensor-4", "sensor-5"]
                }
            },
            "row": {
                "sensorId": {
                    "_gen": "var", "var": "id"
                },
                "timestamp": {
                    "_gen": "formatDateTime",
                    "ms": {
                        "_gen": "now"
                    }
                }
            },
            "stateMachine": {
                "_gen": "stateMachine",
                "for": {
                    "_gen": "var",
                    "var": "id"
                },
                "initial": "start",
                "transitions": {
                    "start": "update",
                    "update": "update"
                },
                "states": {
                    "start": {
                        "row": {
                            "value": {
                                "_gen": "normalDistribution",
                                "mean": 50,
                                "sd": 5
                            }
                        }
                    },
                    "update": {
                        "row": {
                            "value": {
                                "_gen": "add",
                                "args": [
                                    {
                                        "_gen": "uniformDistribution",
                                        "bounds": [-1, 1]
                                    },
                                    {
                                        "_gen": "previousEvent",
                                        "path": [ "row", "value" ]
                                    }
                                ]
                            }
                        }
                    }
                }
            },
            "localConfigs": {
                "throttle": {
                    "ms": 1000
                }
            }
        }
    ],
    "connections": {
        "pg": {
            "kind": "postgres",
            "connectionConfigs": {
                "host": "localhost",
                "port": 5432,
                "db": "mydb"
            }
        }
    }
}

vgraph.vdj

#!vd -p
{"longname": "open-file", "input": "data.json", "keystrokes": "o"}
{"sheet": "data", "col": "row", "row": "", "longname": "expand-col", "input": "", "keystrokes": "(", "comment": "expand current column of containers one level"}
{"sheet": "data", "col": "table", "row": "", "longname": "hide-col", "input": "", "keystrokes": "-", "comment": "Hide current column"}
{"sheet": "data", "col": "row.timestamp", "row": "", "longname": "type-date", "input": "", "keystrokes": "@", "comment": "set type of current column to date"}
{"sheet": "data", "col": "row.timestamp", "row": "", "longname": "key-col", "input": "", "keystrokes": "!", "comment": "toggle current column as a key column"}
{"sheet": "data", "col": "row.sensorId", "row": "", "longname": "key-col", "input": "", "keystrokes": "!", "comment": "toggle current column as a key column"}
{"sheet": "data", "col": "row.value", "row": "", "longname": "plot-column", "input": "", "keystrokes": ".", "comment": "plot current numeric column vs key columns; numeric key column is used for x-axis, while categorical key columns determine color"}