min.size for a contour to be labelled

[Miguel Martinez]

Hi Elio,
In the "Visualization tools vignette" says that "Since in some datasets there can be very small contours that should not be labelled for clarity, the min.size argument specifies the minimum points a contour has to have in order to be labelled". However, min.size parameter is not available. Has the parameter name/usage changed o is it a feature for a future version?
I'm working with metR v.0.11.0 in R.3.6.3

Thanks a lot for this package, I look forward to use some other features.
Miguel

[Elio Campitelli]

The min.size argument is there. In this example, I set it to a ridiculous high number and no contour is labelled.

library(metR)
library(ggplot2)


ggplot(temperature[lev == 300], aes(lon, lat, z = air)) +
    geom_contour_fill() +
    geom_contour(color = "black") +
    geom_text_contour(min.size = 500) +
    scale_fill_divergent() 

^{Created on 2021-11-10 by the reprex package (v2.0.1)}

[Miguel Martinez]

Thanks for your response, it solved my problem.
My bad is that I was trying to put contours and labels directly with geom_contour2 (which doesn't have a min.size parameter), instead of using 2 geoms (geom_contour and geom_text_contour).

[Elio Campitelli]

As of the recent release, you can label contours with geom_contour2(aes(label = ..level..), but it doesn't have that functionality, since it depends on the isoband package, which doesn't have that option control over contouring.