modify font size on y axis for Plotly

Question

When I try to modify my y axis title, it just disapears. Modifying the y axis ticks works just fine. Has anyone had this problem? Thanks!

library(plotly)
set.seed(2017)
x <- seq(1:10)
y <- x + rnorm(10)
plot_ly( x = ~x, y = ~y + rnorm(10)) %>%
     layout(
       xaxis = list(tickfont = list(size = 15)), 
       yaxis = list(tickfont = list(size = 25))) ## This works well.

 plot_ly( x = ~x, y = ~y + rnorm(10)) %>%
     layout(
       xaxis = list(tickfont = list(size = 15)), 
       yaxis = list(titlefont = list(size = 25))) ## This makes the y axis label disappear.

The goal is to modify the size of the y axis title, not to make it disappear all together.

Solution

It seems that it those cases it is necessary to also specify the title itself:

plot_ly( x = ~x, y = ~y + rnorm(10)) %>%
  layout(
    xaxis = list(tickfont = list(size = 15)), 
    yaxis = list(titlefont = list(size = 25), title = "test"))

Comments

[IRTFM]

I'm not getting an error but I am getting a message( actually two such) that suggest you are not passing arguments correctly: No trace type specified: Based on info supplied, a 'scatter' trace seems appropriate. Read more about this trace type -> https://plot.ly/r/reference/#scatter. You SHOULD edit your question to include any messages, and if you are not getting this message, then you should post all your system details.

[Joe]

@ 42, thank you. I updated the code , type and mode. the yaxis title still disappears if the titlefont variable is set.

[Joe]

@ Julius, thank you! In my real work there are multiple charts with the y axis title coming from the variable name, so it doesn't make sense to name it explicitly. Is it possible to use something like title = to the y variable name?

[Julius Vainora]

@Joe, I guess you could do title = deparse(substitute(y))), where y is your variable.

[Joe]

@ Julius, Gracias!!