Properties from second add_trace() are ignored

[rtaggart]

In the example below, the colors and sizes attributes within add_markers() are ignored.

dat1 <- data.frame(x=1:10, y=rnorm(10))
dat2 <- data.frame(x=1:10, y=rnorm(10), group = c("g1", "g2"))


plot_ly() %>%
  add_lines(data = dat1, x=~x, y=~y, color = I("blue")) %>%
  add_markers(data = dat2, x=~x, y=~y, color = ~group, size = ~(abs(x)+1),
              colors = c("g1" = "green", "g2" = "red"),
              sizes = 30*c(1,4), inherit = FALSE)

If add_lines(data = dat1, x=~x, y=~y, color = I("blue")) %>% is removed, then the markers are rendered perfectly. The same issue occurs if plot_ly() is replaced with plot_geo().

[cpsievert]

This is sort of a quirk/undocumented, but scales should be specified when initiating the object

plot_ly(colors = c("g1" = "green", "g2" = "red"), sizes = 30*c(1,4)) %>%
    add_lines(data = dat1, x=~x, y=~y, color = I("blue")) %>%
    add_markers(data = dat2, x=~x, y=~y, color = ~group, size = ~(abs(x)+1))

[nitram9]

@cpsievert I cannot believe I just now found this post. The colors = c("g1" = "green", "g2" = "red") example has fixed a problem I have had since over two years!!! Perhaps this information could be added somewhere to an example.

One can also use symbols by setting the following symbols = c("key1" = "symbol1", "key2" = "symbol2") in the first Plotly call.

plot_ly(colors = c("g1" = "green", "g2" = "red"), symbols = c("g1" = "circle", "g2" = "square"), sizes = 30*c(1,4)) %>%
    add_lines(data = dat1, x=~x, y=~y, color = I("blue")) %>%
    add_markers(data = dat2, x=~x, y=~y, color = ~group, symbol = ~group, size = ~(abs(x)+1))

To also change the size of the marker (for when doing add_trace with lines+markers for example), the marker attribute is needed:

plot_ly(colors = c("g1" = "green", "g2" = "red"), symbols = c("g1" = "circle", "g2" = "square"), sizes = 30*c(1,4)) %>%
    add_lines(data = dat1, x=~x, y=~y, color = I("blue")) %>%
    add_markers(data = dat2, x=~x, y=~y, color = ~group, symbol = ~group, size = ~(abs(x)+1), marker = list(size = 20))

The thing that confuses me is why I cannot use the marker attribute to also set the symbol and color such as in the following manner: marker = list(size = 20, symbol = ~group, color = ~group). Perhaps you can explain, @cpsievert ? Thanks in advance!