`ScaleYMonthDay`

Temporal y position scale (month-day (year collapsed)).

Defaults

helper: scaleYMonthDay
family: position-temporal
aesthetic: y
scale type: time
temporalKind: monthDay
options type: TemporalScaleOptions

Svelte component

import { GGPlot, GeomPoint, ScaleYMonthDay } from "@ggsvelte/svelte";

<GGPlot data={rows} aes={{ x: "x", y: "y" }}>
  <ScaleYMonthDay />
  <GeomPoint />
</GGPlot>

JSON scales

{
  "scales": {
    "y": {
      "type": "time",
      "temporalKind": "monthDay"
    }
  }
}

Params

domain

Array<DomainValue>

Explicit domain, PINNING the scale: [min, max] for continuous scales (numbers, or temporal strings for time); the full category list for band scales. Data outside the domain is dropped with a warning.

nice

boolean

Round the inferred domain to tick-friendly bounds. Default true. Ignored when `domain` is set.

reverse

boolean

Reverse the scale's output direction. Default false.

breaks

Array<number | string>

Explicit tick positions in data units (numbers, or ISO date strings for time scales); for binned scales these are the bin boundaries. Omit for automatic ticks. Binned scales allow at most 65 boundaries (64 bins); non-binned explicit ticks are not capped.

labels

string

Tick label format string. Time scales: strftime-style ("%Y-%m", "%b %d", "%H:%M"). Numeric scales: ",d" (grouped integer), ".1f" (fixed decimals), ".0%" (percent), "~s" (SI prefix). Omit for automatic formatting.

expand

ScaleExpansion

Display-domain padding. Non-temporal continuous/binned axes default to { mult: 0.05, add: 0 }; time axes default to zero. Pinned domains still receive display expansion.

oob

"censor" | "squish"

Out-of-bounds policy for values outside explicit source limits, applied before stats. "censor" (default) drops them to missing; "squish" clamps them to the nearest source limit before transform.

naValue

number | unknown

Replacement for missing/censored positional values, resolved after OOB and before transform. A finite number substitutes; null (default) keeps them missing. The replacement is itself checked against the transform/domain rules.

minorBreaks

Array<number>

Explicit minor gridline positions in semantic source units. Coincident major/minor values render only the major tick. Time scales use dateMinorBreaks instead.

parse

TemporalParserSpec

Explicit deterministic parser for temporal source values. Omit for value-driven inference.

parseFailure

"error" | "censor"

Explicit parser failure policy: "error" (default) stops with bounded evidence; "censor" converts invalid values to missing and emits a warning.

timezone

string

IANA timezone used for timezone-less temporal input. Default "UTC". Invalid zones fail with an actionable diagnostic.

disambiguation

"compatible" | "earlier" | "later" | "reject"

DST gap/fold policy for IANA local times. Default "reject"; choose "earlier", "later", or Temporal-compatible behavior explicitly.

dateBreaks

string

A positive integer calendar interval such as "2 weeks", "3 months", or "10 years". Canonical units are millisecond, second, minute, hour, day, week, month, quarter, and year.

dateMinorBreaks

string

A positive integer calendar interval such as "2 weeks", "3 months", or "10 years". Canonical units are millisecond, second, minute, hour, day, week, month, quarter, and year.

dateLabels

string

Strict temporal label format. Supported tokens: %Y %y %m %b %B %d %e %a %A %H %I %M %S %L %p %q %z %Z %%.

locale

string

BCP 47 locale for temporal labels. Default "en-US". JSON Schema bounds the portable string shape; runtime validation canonicalizes the tag and verifies Intl support before rendering.

weekStart

Week boundary used by temporal interval breaks. Default "monday".

guide

GuideSpec | BandAxisGuideSpec

Guide presentation override (legend, colorbar, colorsteps, or none).

Guide interaction

Axis guide on the position channel (band axis guide when type is band). Set guide to customize ticks/labels or guide: "none" to hide.

Examples

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