ggplotly in R : change data label size

Question

I have to convert a ggplot to a plotly. Naturally, the easiest way to do so seems to be using ggploty, but the font size change. No problem to get back to the good size for axis labels and title, but I cannot figure how to do this for data labels? Any ideas? I do prefer to keep the ggplot and wrap it with ggplotly (many other plots as well).

I tried the font from layout with no success:

library(ggplot2)
library(plotly)

tbl <- data.frame(
  indicateur = c("freq1", "freq2", "freq3" ),
  valeur = c(44, 78, 84)
)

ggplotly(
  ggplot(tbl) +
    geom_bar(aes(x = indicateur, y = valeur), stat = 'identity', fill = rgb(31, 119, 180, maxColorValue = 255)) +
    geom_text(aes(x = indicateur, y = valeur, label = valeur), vjust = -0.5) + 
    ylim(0, max(tbl$valeur)*1.1) +
    labs(x = "", y = "", title = "simple counting") +
    theme_bw() +
    theme(
      axis.line = element_blank(), 
      panel.border = element_blank(),
      plot.title = element_text(hjust = 0.5)
    )
  ) %>%
  layout(
    showlegend = FALSE, 
    textfont = list(size = 5), 
    titlefont = list(size = 12),
    xaxis = list(tickfont = list(size = 9))
  )

Thanks in advance for the help.

score 0 · Accepted Answer · answered Mar 21 '19 at 14:28

How about just passing size into geom_text? In addition, I do not believe all the layout adjustments are necessary. See the following:

library(tidyverse)
library(plotly)

tbl <- data.frame(
  indicateur = c("freq1", "freq2", "freq3" ),
  valeur = c(44, 78, 84)
)

p_size_5 <- ggplot(tbl, aes(x = indicateur, y = valeur, label = valeur)) +
  geom_bar(stat = "identity", fill = rgb(31, 119, 180, maxColorValue = 255)) +
  geom_text(vjust = -0.5, size = 5) +
  labs(
    title = "simple counting (text 5)",
    x = NULL, y = NULL
  ) +
  theme_bw() +
  theme(
    axis.line = element_blank(),
    panel.border = element_blank(),
    plot.title = element_text(hjust = 0.5)
  )

ggplotly(p_size_5)

p_size_2 <- ggplot(tbl, aes(x = indicateur, y = valeur, label = valeur)) +
  geom_bar(stat = "identity", fill = rgb(31, 119, 180, maxColorValue = 255)) +
  geom_text(vjust = -0.5, size = 2) +
  labs(
    title = "simple counting (text 2)",
    x = NULL, y = NULL
  ) +
  theme_bw() +
  theme(
    axis.line = element_blank(),
    panel.border = element_blank(),
    plot.title = element_text(hjust = 0.5)
  )

ggplotly(p_size_2)

Thanks! I had completely forgotton that it's possible to pass some values to plotly directly from within ggplot! Well, I need those extra layout options formy actual axis labels are long and for them to be legible, I need a smaller font size. — Parisa, Mar 21 '19 at 14:57

ggplotly in R : change data label size

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