漏洞？使用 date/timeunit 的数据转换
Bug? Using a data transform with date/timeunit
一段时间以来，我一直在使用 flatten 转换将数据从柱状数据框移动到 Vega Lite 规范，想知道这是否是我最近遇到的问题的根源一个时间序列。使用flatten的time series spec is in a gist on the vega editor, along with a similar pattern plotting sin and cos没有问题。
据我所知，spx 时间序列 应该 使用此转换，如果我自己将数据展平，它确实有效。我没主意了；也许 flatten 和 date/times 有什么奇怪的地方？我已经尝试了类型规范、timeUnit 等的所有组合，我能想到但似乎没有任何效果。
谁能发现 spx 时间序列要点中的错误？
出于某种原因，您的日期没有得到正确的解析。这可能是一个错误，但您可以通过使用计算将您的日期转换为正确的日期来轻松解决它。
{
"transform": [
{"flatten": ["spxdate", "open", "high", "low", "close"]},
{"calculate": "toDate(datum.spxdate)", "as": "new"}
],
"data": {
"values": {
"spxdate": [
"1990-01-02",
"1990-01-03",
"1990-01-04",
"1990-01-05",
"1990-01-08",
"1990-01-09",
"1990-01-10",
"1990-01-11",
"1990-01-12",
"1990-01-15",
"1990-01-16",
"1990-01-17",
"1990-01-18",
"1990-01-19",
"1990-01-22",
"1990-01-23",
"1990-01-24",
"1990-01-25",
"1990-01-26",
"1990-01-29",
"1990-01-30",
"1990-01-31",
"1990-02-01",
"1990-02-02",
"1990-02-05",
"1990-02-06",
"1990-02-07",
"1990-02-08",
"1990-02-09",
"1990-02-12",
"1990-02-13",
"1990-02-14",
"1990-02-15",
"1990-02-16",
"1990-02-20",
"1990-02-21",
"1990-02-22",
"1990-02-23",
"1990-02-26",
"1990-02-27",
"1990-02-28",
"1990-03-01",
"1990-03-02",
"1990-03-05",
"1990-03-06",
"1990-03-07",
"1990-03-08",
"1990-03-09",
"1990-03-12",
"1990-03-13",
"1990-03-14",
"1990-03-15",
"1990-03-16",
"1990-03-19",
"1990-03-20",
"1990-03-21",
"1990-03-22",
"1990-03-23",
"1990-03-26",
"1990-03-27",
"1990-03-28",
"1990-03-29",
"1990-03-30",
"1990-04-02",
"1990-04-03",
"1990-04-04",
"1990-04-05",
"1990-04-06",
"1990-04-09",
"1990-04-10",
"1990-04-11",
"1990-04-12",
"1990-04-16",
"1990-04-17",
"1990-04-18",
"1990-04-19",
"1990-04-20",
"1990-04-23",
"1990-04-24",
"1990-04-25",
"1990-04-26",
"1990-04-27",
"1990-04-30",
"1990-05-01",
"1990-05-02",
"1990-05-03",
"1990-05-04",
"1990-05-07",
"1990-05-08",
"1990-05-09",
"1990-05-10",
"1990-05-11",
"1990-05-14",
"1990-05-15",
"1990-05-16",
"1990-05-17",
"1990-05-18",
"1990-05-21",
"1990-05-22",
"1990-05-23"
],
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}
},
"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
"height": 400,
"width": 600,
"mark": "line",
"encoding": {
"x": {"field": "new", "type": "temporal", "timeUnit": "yearmonthdate"},
"y": {"field": "close", "type": "quantitative"}
}
}
一段时间以来，我一直在使用 flatten 转换将数据从柱状数据框移动到 Vega Lite 规范，想知道这是否是我最近遇到的问题的根源一个时间序列。使用flatten的time series spec is in a gist on the vega editor, along with a similar pattern plotting sin and cos没有问题。
据我所知，spx 时间序列 应该 使用此转换，如果我自己将数据展平，它确实有效。我没主意了；也许 flatten 和 date/times 有什么奇怪的地方？我已经尝试了类型规范、timeUnit 等的所有组合，我能想到但似乎没有任何效果。
谁能发现 spx 时间序列要点中的错误？
出于某种原因，您的日期没有得到正确的解析。这可能是一个错误，但您可以通过使用计算将您的日期转换为正确的日期来轻松解决它。
{
"transform": [
{"flatten": ["spxdate", "open", "high", "low", "close"]},
{"calculate": "toDate(datum.spxdate)", "as": "new"}
],
"data": {
"values": {
"spxdate": [
"1990-01-02",
"1990-01-03",
"1990-01-04",
"1990-01-05",
"1990-01-08",
"1990-01-09",
"1990-01-10",
"1990-01-11",
"1990-01-12",
"1990-01-15",
"1990-01-16",
"1990-01-17",
"1990-01-18",
"1990-01-19",
"1990-01-22",
"1990-01-23",
"1990-01-24",
"1990-01-25",
"1990-01-26",
"1990-01-29",
"1990-01-30",
"1990-01-31",
"1990-02-01",
"1990-02-02",
"1990-02-05",
"1990-02-06",
"1990-02-07",
"1990-02-08",
"1990-02-09",
"1990-02-12",
"1990-02-13",
"1990-02-14",
"1990-02-15",
"1990-02-16",
"1990-02-20",
"1990-02-21",
"1990-02-22",
"1990-02-23",
"1990-02-26",
"1990-02-27",
"1990-02-28",
"1990-03-01",
"1990-03-02",
"1990-03-05",
"1990-03-06",
"1990-03-07",
"1990-03-08",
"1990-03-09",
"1990-03-12",
"1990-03-13",
"1990-03-14",
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"1990-03-21",
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"1990-03-27",
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"1990-05-16",
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"1990-05-18",
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],
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