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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 plan_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, plan_draw() for pixels.

Examples

if (FALSE) { # \dontrun{
lr <- lazy_source("cube.tif")
plan_view(focal_map(lr * 2, radius = 1L, fn = function(sh) Reduce(`+`, sh) / length(sh)))
} # }