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rscalerasternetcdf

Changing scale colour to specific number in R

I've uploaded my data onto github here: https://github.com/dschmidt42/Benguela_Chla_Danielle_Schmidt.

To set up my data:

chl_data <- "cmems_mod_glo_bgc_my_0.25_P1M-m_1673881119174.nc"
r <- rast(chl_data)
i <- seq(1, nlyr(r), 3) 
r1 <- r[[i]]
vm <- tapp(r1, "months", var)

Here are the resulting plots:

titles <- c("January", "February", 
            "March", "April", 
            "May", "June", 
            "July", "August", 
            "September", "October",
            "November", "December")
plot(vm, main = titles)

enter image description here

As you can see, the scales are all the same though they have different values. How can I change it so that 4.0 on one graph is not the same as 1.5 on another?

Solution

  • You can try setting the breaks manually and the type of the rasters as continuous.

    library(terra)
plot(vm, 
     main = titles,
     type = "continuous",
     breaks = seq(0,4,0.5))