Is there a way to zoom heatmaps in echarts4r similar to d3heatmap? (https://github.com/rstudio/d3heatmap). The purpose is to use the callbacks in echarts4r to trigger events when clicking and hovering over on the heatmap which d3heatmap doesn't have (that I know of).
This code is copied from (https://echarts4r.john-coene.com/articles/chart_types.html#heatmap) with the addition of the brush. The brush shows and can select a zoom window, however the chart doesn't zoom.
v <- LETTERS[1:10]
matrix <- data.frame(
x = sample(v, 300, replace = TRUE),
y = sample(v, 300, replace = TRUE),
z = rnorm(300, 10, 1),
stringsAsFactors = FALSE
) %>%
dplyr::group_by(x, y) %>%
dplyr::summarise(z = sum(z)) %>%
dplyr::ungroup()
matrix %>%
e_charts(x) %>%
e_heatmap(y, z) %>%
e_visual_map(z) %>%
e_title("Heatmap") %>%
e_brush() # add the brush
The brush and the zoom are two different things in echarts: use e_datazoom instead.
v <- LETTERS[1:10]
matrix <- data.frame(
x = sample(v, 300, replace = TRUE),
y = sample(v, 300, replace = TRUE),
z = rnorm(300, 10, 1),
stringsAsFactors = FALSE
) %>%
dplyr::group_by(x, y) %>%
dplyr::summarise(z = sum(z)) %>%
dplyr::ungroup()
matrix %>%
e_charts(x) %>%
e_heatmap(y, z) %>%
e_visual_map(z) %>%
e_title("Heatmap") %>%
e_datazoom() # use zoom