Scatterplot with missing values uses the wrong attributes

Plotly R, MATLAB, Julia, Net Plotly R
#1

Greetings,

I’m plotting a scatterplot with some “selected” points (coming from the “mask” column of a data source), but plot.ly seems to pull attributes (for color, size, etc.) from non-missing values. Here’s an example, which shouldn’t plot any red points. Can anyone else confirm this? Thanks.

if (!require('pacman')) install.packages('pacman')
pacman::p_load(
  "dplyr",
  "plotly"
)

#' iris dataset with NA values for Sepal.Width in the first rows after shuffling
#'
#' Note that only those rows with NA values for Sepal.Width
#' are selected by mask.
#'
#' @param rowsToNA integer, number of rows to assign NAs
#'
#' @return tibble with rowsToNA initial NA values for Sepal.Width
#' @export
#'
#' @examples
irisWithNA <- function(rowsToNA) {
  base::set.seed(123)

  dplyr::as_tibble(iris) %>%
    dplyr::mutate(
      key = base::as.character(dplyr::row_number())
    ) %>%
    dplyr::arrange(stats::runif(dplyr::n())) %>%
    dplyr::mutate(
      Sepal.Width = base::ifelse(dplyr::row_number() <= rowsToNA, NA, Sepal.Width),
      mask = base::is.na(Sepal.Width)
    )
}

actual <- function(df) {
  df %>%
    plotly::plot_ly() %>%
    plotly::add_trace(
      type = "scatter",
      mode = "markers",
      x = ~Sepal.Length,
      y = ~Sepal.Width,
      text = ~base::paste0(Species, " (", key, ")"),
      marker = list(
        symbol = "o",  # solid ball
        color = ~base::ifelse(mask, "red", "black"),
        size = ~10 * base::ifelse(mask, 1, 0.2),
        line = list(width = 0L)
      )
    )
}

expected <- function(df) {
  df %>%
    plotly::plot_ly() %>%
    plotly::add_trace(
      type = "scatter",
      mode = "markers",
      x = ~Sepal.Length,
      y = ~Sepal.Width,
      text = ~base::paste0(Species, " (", key, ")"),
      marker = list(
        symbol = "o",  # solid ball
        color = "black",
        size = 2,
        line = list(width = 0L)
      )
    )
}

showResults <- function(rowsToNA = 10) {
  # Because only NA rows are selected by the mask column,
  # nothing in the plot should show up large and red.
  # What appears to be happening is that the next non-NA
  # values of the data frame are being plotted.
  df <- irisWithNA(rowsToNA = rowsToNA)
  plotly::subplot(actual(df), expected(df)) %>%
    plotly::layout(
      title = "Actual | Expected",
      showlegend = FALSE
    ) %>%
    print()
  # Show the next non-NA values
  print(head(df, 2 * rowsToNA))
}

showResults(rowsToNA = 1)