Added two new coordinate systems: `coord_polar` and `coord_radial`. - #1059

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has2k1 merged 126 commits into

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iangow:coord-polar

Aug 15, 2026

Commits on Aug 14, 2026

Add coord_polar coordinate system

iangow
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has2k1
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8cd543d
Rewrite coord_polar to use Matplotlib's native PolarAxes

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d7f694f
Add radial coordinate system

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bc21452
Extend coord_radial: partial-arc fixes, thetalim/rlim, theta axis labels

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80667e9
Add theta_labels parameter to coord_radial for full-circle theta axis labels

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7347950
Add pad to theta tick labels to clear the outer circle spine

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6916129
Expose theta_label_pad parameter on coord_radial

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fb42ab7
Fix theta_label_pad being overwritten by facet margin padding

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a829df1
Fix theta breaks with negative angles causing partial-arc regression

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b9a7b20
Fix start-angle rotation hiding bars for full-circle plots

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6f5ca36
Hide polar spine when panel_border=element_blank()

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b4cfa0f
Set clip_on=False on geom_text artists in PolarAxes

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472dbef
Transform polar segment endpoints

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89f29a6
Document polar coordinates

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c7f5ff2
Add coord polar and radial coverage tests

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c675aaa
Fix polar coordinate type checking

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66ac9b8
Remove coord polar notebook

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d006abe
Move projection selection to coord classes

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0ad26b5
Move axes setup to coord classes

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530cfbc
Move polar border blanking to themeable

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05a1a4b
Document custom themeable extension path

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65a3d69
Added `guide_axis_theta()` (initial pass).

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0a2cf79
fix guide_axis_theta: use 'auto' mode so angle is relative to tangent

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99921ca
Document guide_axis_theta semantics

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c71e9d4
fix(coord_polar): swap axis titles when theta='y'
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b373f12
fix(coord_polar): correct polar coordinate setup
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0ec324e
fix(coord_radial): align rotate_angle labels to spokes and keep them upright
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05b6ce1
fix(coord_radial): draw radial axis labels above the geoms
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2f5a75d
feat(coord_radial): add reverse argument and per-panel range derivation
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7e1d66e
fix(coord_polar): layer gridlines below geoms, axis labels above
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e206179
test(coord_polar): fix stale p9polar assertion, drop introspective test
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0c68a36
fix(coord_polar): skip cartesian per-side axis setup
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a50f31f
fix(theme): guard axis_line blank_ax against non-cartesian spines
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c13b860
feat(coord): bind coord._owner to the plot at draw setup
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2146c5d
fix(coord_radial): read guide_axis_theta angle via coord._owner
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1d4fb29
feat(layout): reserve polar panel clearance for theta/r axis decorations
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b0a9fe2
feat(theme): add axis_line_theta/axis_line_r for polar spines
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0c299f6
fix(coord_radial): persist themed theta/r spine visibility across draws
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862e964
test(coord_polar): cover axis_line control of polar/radial spines
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d2560ee
docs(coord_radial): tighten p9PolarAxes.draw docstring precision
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dd1e5de
fix(coord_radial): make axis_line polar spine locking re-entrant
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89dc0a1
feat(typing): add PolarSide alias for theta/r side names
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5d39f43
feat(utils): widen side_artists/MARGIN_SIDE for polar sides
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8dff09e
feat(mpl): make axis_at resolve polar theta/r sides
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61125f8
feat(mpl): add axis_at_side bookkeeping to p9PolarAxes
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123e8d3
fix(coord_polar): activate theta/r tick sides from scale position
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96e5df1
refactor(coord_polar): reuse p9PolarAxes.thetaaxis/raxis instead of ad hoc casts
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22b0780
feat(coord_radial): remove r_axis_inside, drive r placement from scale_y position
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997f64c
feat(theme): add axis_text_theta/axis_text_r themeables for polar panels
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e5d3d43
fix(coord_radial): preserve themed r-axis tick style across mpl reset_ticks
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186fb48
feat(theme): add axis_ticks_major_theta/axis_ticks_major_r themeables
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ad59ea3
feat(theme): add axis_ticks_minor_theta/axis_ticks_minor_r themeables
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dd6359f
docs(tests): clarify axis_ticks_minor_theming test only exercises r-axis
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48fa6b7
fix(theme): stop zeroing polar tick length, add axis_ticks_length_theta/r
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ea7910e
docs(theme): explain why axis_ticks_length_theta/r don't split by boundary
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5785400
test(coord_polar): cover scale position driving theta/r side choice
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7b452ac
feat(theme): expose polar theta/r themeables in theme signature and docs
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6e8cf7c
refactor(coord_polar): lock r-axis tick style from setup_ax
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024731f
fix(coord_polar): put theta tick labels on the mark's side
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960356f
fix(coord_polar): let scale position move only the axis title
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5ae1c97
fix(coord_radial): restore theta minor grid breaks
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4b22230
fix(coord_polar): expand theta axis per the expand flag
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857d74b
refactor(coord): make coord_radial the base, coord_polar its alias
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7294990
test(coord): rename polar tests to coord_radial, keep one alias test
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1904c62
refactor(coords): separate radial data and display axes
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e21fded
fix(coord_radial): align r axis with start
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2d6bbf2
fix(coord_radial): align radial axis text
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ad6d132
fix(coord_radial): hide unoccupied radial axis line
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0de57c3
fix(coord_radial): keep radial axis at start
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5852f1b
fix(coord_radial): align explicit full-circle axes
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9699665
fix(coord_radial): equalize theta label clearance
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3a00915
fix(coord_radial): trim unused theta label descent
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337cca4
fix(coord_radial): reverse theta in place, not by mirroring
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b7f2aa6
fix(coord_radial): reverse radial geometry
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6b06e7c
feat(coord_radial): render a second r-axis at the end spoke
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2b61f33
refactor(iapi): allow a polar side on sec_axis_view.position
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96867ad
feat(coord_radial): wire a secondary r-axis from scale sec_axis
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59c19b1
test(coord_radial): verify secondary r-axis theming and title sides
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7244518
test(coord_radial): secondary r-axis with theta='y'
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7e5e7f0
fix(coord_radial): correct secondary r-axis spine spoke and drop dead code
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15d364c
fix(coord_radial): register secondary-axis lim_changed callback signal
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325d3a4
fix(coord_radial): negate secondary r-axis breaks under reverse="r"
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06c93cb
feat(coord_radial): render the full-circle secondary r-axis
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3b34bfe
fix(coord_radial): keep secondary r-axis marks on the spoke and above gridlines
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310db84
fix(coord_radial): move secondary r-axis to the spoke opposite the primary
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efbee99
fix(coord_radial): reposition axis titles when theta="y"
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e086df9
feat(coord_radial): aspect from tight sector bounding box
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be581e2
fix(coord_radial): fill the panel with partial arcs
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e535eb6
test(coord_radial): assert partial arcs fill panels undistorted
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c6d724f
test(coord_radial): visual baselines for partial-arc spacing
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ae844c3
fix(coord_radial): fill narrow donut arcs to the panel edge
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929080a
fix(coord_radial): render the wedge background undistorted
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f1f7ea1
fix(coord_radial): clip geoms to the arc on a single render
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6bc8705
fix(coord_radial): stop r-labels reserving spurious panel margin
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646c532
fix(coord_radial): reserve gulley and strip space for polar decorations
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b31c184
fix(coord_radial): stop the donut hole from drawing an axis line
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edeec46
refactor(coord_radial): drop the direction parameter
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f4801d8
docs(coord_radial): correct the polar spine visibility rationale
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2777d66
refactor(guides)!: remove guide_axis_theta
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57a77e8
test(coord_radial): drop tests that assert render state
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b08e703
test(coord_radial): add arc and donut baseline images
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b8d9272
test(coord_radial): add theta-axis, expansion and zoom images
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e3d938b
test(coord_radial): add reverse-axis baseline images
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f16a519
test(coord_radial): add geom-interaction baseline images
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test(coord_radial): add axis-line baseline images
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test(coord_radial): add tick, label and grid theming images
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test(coord_radial): add axis-title and secondary-axis images
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231d049
test(coord_radial): add facet, label-gap and legend images
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c4e6df5
test(coord_radial): review and trim the image matrix
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0402cc3
docs(coord_radial): correct what expand buffers
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45c7624
test(themes): add the extension-themeable baseline image
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d90bf2a
feat(coord_radial): place the secondary theta breaks on the arc
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09102b2
feat(coord_radial): draw the secondary theta axis on the inner rim
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f065d88
test(coord_radial): cover secondary theta axis variants
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a74684b
refactor(coord_flip): narrow the secondary axis side before flipping it
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0365c1b
fix(themes): hide the radial tick labels when axis_text_r is blank
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e4f5b91
fix(coord_radial): reject zero-width arcs
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326b559
fix(coord_radial): transform all position aesthetics
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55f402f
fix(layout): keep polar tick labels inside the figure
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1faae45
fix(layout): reserve polar space only where a label reaches
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16722b3
refactor(coord_radial): centralise polar label geometry
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6afc200
fix(coord_radial): align theta labels with their ticks
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a7140e4
fix(coord_radial): align r labels with their spokes
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cebc705
fix(layout): reserve space by polar label direction
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dbceebf
refactor(coord_radial): move polar geometry to panel axes
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5b1b510
test(coord_radial): add the baseline images
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