ggplot colorbar align to top when using facets

By -

I am using facetted plots via ggplot that contain a colorbar. I want to scale the colorbar to the size of the facetted plot. Following the ideas of @AllanCameron in this post regarding a single plot and tweaking the function to account for both the strip size and the space between plots, I am able to correctly work out the size of the legend. Thereby, the size of the legend is correctly specified irrespective of the ncol, panel.spacing.y, or strip.text.x specification.

However, by default, the legend is centered between the two plots without strips. Adjusting the legend via legend.position or legend.justification did so far not help to correctly specify it. How can I properly align the legend with the top of the chart i.e., the top of the strip (see the plot on the right side for the exptected output)?

example

I only aligned in the right chart the legend to the top without adjusting the size using an external graphics programme. Thus, while the legend height looks too small in the picture on the left chart, the size is actually fine.

library(ggplot2)

df <- expand.grid(
  x = c(1, 2, 3),
  y = c(1, 2, 3),
  g = c("one", "two", "three", "four")
)

set.seed(1)
df$v <- runif(nrow(df), min = 0, max = 1)

make_fullsize <- function() structure("", class = "fullsizebar")

ggplot_add.fullsizebar <- function(obj, g, name = "fullsizebar") {
  h <- ggplotGrob(g)$heights
  panel <- which(grid::unitType(h) == "null")
  panel_height <- unit(1, "npc") - sum(h[-c(panel, (panel-1), grep("lines", h))])

  g + 
    guides(fill = guide_colorbar(barheight = panel_height,
                                 title.position = "right")) +
    theme(legend.title = element_text(angle = -90, hjust = 0.5))
}

ggplot(df, aes(x = x, y = y, fill = v)) +
  facet_wrap(. ~ g, ncol = 2) +
  geom_tile(color = "black") +
  scale_y_discrete(expand = c(0,0)) +
  scale_x_discrete(expand = c(0,0)) +
  theme(panel.spacing.y = unit(1, "lines"),
        strip.text.x = element_text(size = 15, margin = margin(2,0,2,0, "cm")),
        strip.background.x = element_rect(
        colour = "black", linewidth = 1)) +
  make_fullsize()


Comments

Post a Comment

Popular posts from this blog

Today Walkin 14th-Sept

By -
Image
14th Sept 2017 ( GO Through all List) Read Walkin details properly , Try to call company before attending if possible !!! ==================================== 1. Myntra through fresherworld (Call Based , Venue shared to shortlisted candidates) _____________________________ 2. Magna : Hiring for Client Harman : C++
Read more

Hibernate Search - Elasticsearch with JSON manipulation

By -
Elasticsearch with JSON manipulation Elasticsearch ships with many features. It is possible that at some point, one feature you need will not be exposed by the Search DSL. To work around such limitations, Hibernate Search provides ways to: Transform the HTTP request sent to Elasticsearch for search queries. Read the raw JSON of the HTTP response received from Elasticsearch for search queries. Direct changes to the HTTP request may conflict with Hibernate Search features and be supported differently by different versions of Elasticsearch. Similarly, the content of the HTTP response may change depending on the version of Elasticsearch, depending on which Hibernate Search features are used, and even depending on how Hibernate Search features are implemented. Thus, features relying on direct access to HTTP requests or responses cannot be guaranteed to continue to work when upgrading Hibernate Search, even for micro upgrades (x.y.z to x.y.(z+1)). Use this at your own risk.
Read more

Spring Elasticsearch Operations

By -
Elasticsearch Operations Spring Data Elasticsearch uses two interfaces to define the operations that can be called against an Elasticsearch index. These are ElasticsearchOperations and ReactiveElasticsearchOperations. Whereas the first is used with the classic synchronous implementations, the second one uses reactive infrastructure. The default implementations of the interfaces offer: Read/Write mapping support for domain types. A rich query and criteria api. Resource management and Exception translation. ElasticsearchTemplate The ElasticsearchTemplate is an implementation of the ElasticsearchOperations interface using the Transport Client. @Configuration public class TransportClientConfig extends ElasticsearchConfigurationSupport {   @Bean   public Client elasticsearchClient() throws UnknownHostException {                      Settings settings = Settings.builder().put("cluster.name", "elasticsearch").build();     TransportClient client = new P
Read more