View source: R/functions_velocity.R
| plot_regional_velocity | R Documentation | 
plot_regional_velocity
plot_regional_velocity(
  tsne_dt,
  tall_var_a,
  tall_var_b,
  x_points,
  y_points = x_points,
  points_as_background = FALSE,
  p = NULL,
  min_N = 0,
  id_to_plot = NULL,
  strategy = c("by_direction", "by_destination")[2],
  arrow_FUN = NULL,
  angle_as_color = FALSE
)
| tsne_dt | tidy data.table of tsne results. variables names must include: tx, ty, id, and tall_var | 
| tall_var_a | an item in tsne_dt$tall_var. the origin for calculating angle/distance. | 
| tall_var_b | an item in tsne_dt$tall_var. the destination for calculating angle/distance. | 
| x_points | number of equally spaced bins in the x-dimension. Required. | 
| y_points | number of equally spaced bins in the y-dimension. Default is x_points. | 
| points_as_background | if TRUE, show points in background. | 
| p | an existing ggplot to overlay images onto. Default of NULL starts a new plot. | 
| min_N | regional bins with fewer than min_N counts will not be shown. | 
| id_to_plot | character. ids in tsne_dt$id. Default of NULL causes all ids to be used. | 
| strategy | character. must be one of "by_direction" or "by_destination" | 
| arrow_FUN | result of grid::arrow(). Default of NULL does not draw arrowheads. | 
| angle_as_color | if TRUE, a rainbow like scale is applied to angle. | 
ggplot where regionally binned velocities are summarized.
data("tsne_dt")
plot_regional_velocity(tsne_dt, unique(tsne_dt$tall_var)[1],
    unique(tsne_dt$tall_var)[2], 4, min_N = 4, arrow_FUN = arrow())
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