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Interactive Plan viewer.

plan_view.Rd

Renders a Plan as an interactive DAG (an htmlwidget, via the suggested visNetwork package): one node per stage, laid out left to right in execution order on explicit topological levels. Stages are labelled by what they compute, not just their scheduler kind: a compute stage is classified by the IR nodes fused into it (focal, scan, patch, stack, map, most informative first, the same vocabulary as draw()), and reduce stages carry their reducer (reduce\u00b7median). When a LazyDataset is passed, derived bands (ds[["ndvi"]] <- ...) are recovered from the dataset's step record and the stage computing one is labelled with the band name (derive\u00b7ndvi); the derivation is bounded structurally at the first non-elementwise node, so it survives subsetting (ds["ndvi"]). Hovering a stage shows its full op composition and any recoverable metadata: acquisition dates on slice sources and t-spans on composites (from stack ordering and grid labels), the band a stage computes, source file and band, and op parameters (reducer and axis, focal radius, scan direction): plus members, halo, device, and output grid; clicking highlights its neighbours; the sink stage is drawn with a heavy border. Where plan_dot() emits static Graphviz text, plan_view() is the exploratory sibling: watch the plan change shape as a pipeline is composed.

Usage

plan_view(
  x,
  level_separation = NULL,
  node_spacing = 90,
  height = "600px",
  width = "100%"
)

Arguments

x

A Plan from plan_lazy(), a LazyRaster, a LazyDataset (its bands are assembled along the band axis first, as in collect()), or a named list of LazyRasters.

level_separation

Horizontal distance between topological levels, in pixels. NULL (default) adapts to the graph's shape: wide plans (many sources, few levels) get a landscape aspect so the left-to-right flow stays legible, floored by label clearance and capped for deep plans. Pass a number to override.

node_spacing

Distance between nodes within a level, in pixels: vertical, since levels run left to right. The tall stretch of a wide plan (e.g. one source per time slice) is this times the widest level's node count; lower it to compress.

height, width

Widget size, as CSS units.

Value

A visNetwork htmlwidget.

See also

plan_dot() for DOT text, draw() for pixels.

Examples

if (FALSE) { # \dontrun{
lr <- lazy_source("cube.tif")
plan_view(focal(lr * 2, radius = 1L, fn = g_mean))
} # }