Cytometry: new gates, scales, faster statistics, plot rendering and exports

2026.10.24-cytometrie-gates-echelles-exports · 2026-10-24

Delivered build : 534728a451d387e948434ad46e12417dd51acb13

Changes

Gates: the curvy quadrant (CurlyQuad) and the spider gate (Spider) join the existing shapes, with a final geometry computed by the server; ellipses and rectangles follow the usual cytometry conventions (rectangle open at the top of the axis). Gates of a sample group stay in sync.
Scales and parameters: Hyperlog scale, a biexponential scale, geometric mean, and derived parameters by formula (ratios, sums, logarithms), computed for local and hosted tubes; the entry screen only offers them on local tubes for now.
Statistics: median, percentiles, median absolute deviation and standard deviation, about six times faster on large tubes (2.7 million events: from 8.4 s to 1.3 s, identical results).
Plots: contour, zebra, density, palettes including Cividis, dot size, mouse-wheel or Shift + drag zoom, axis limits typed in the parameter's own unit, extra ticks when zoomed, histogram options, population overlay with true event counts and backgating.
Exports: PNG image at 1x, 2x or 4x, a lighter vector SVG, copy to clipboard, an A4 PDF sheet of every plot in the gallery, statistics as CSV.
Desktop app: heavy tubes are read in place on the computer, a disk cache makes reopening a tube almost instant, and the desktop app version shows in the sidebar.
Validated gates: a gate can be deleted until the study of its analysis is completed (the gate and its validations go, with an audit event); it locks once the study is completed, published, stopped or archived.

These tools stay off by default for existing teams (Annex D): an administrator turns them on team by team.
The biexponential scale is an empirical model: 94%, 85% and 81% of gates fall within 1% of the reference values on three control datasets, short of the 90% goal everywhere.
The curvy quadrant was not validated against a real reference file. Detailed statistics (standard deviation, median absolute deviation, percentiles, mode) have no exported reference.
No layout editor, tSNE, UMAP or batch processing yet. The new desktop app version is not published yet: the disk cache and the version display need that update.