Possible regression: invalid 'layout.pos.row'

[lindeloev]

I am using patchwork to arrange bayesplot plots. I'm attaching one such plot, plot1.zip, which is a facet_wrap'ed plot using ncol = 1. Use load("plot1.RData") to load it.

In the "old" patchwork GitHub version (unsure how old, unfortunately, but between two months and a year), this would make two columns as expected:

    plot1 + plot1 

However, with the CRAN version 1.0.0, it yields the following error:

Error in grid.Call.graphics(C_setviewport, vp, TRUE) : 
  invalid 'layout.pos.row'

I'm just including one plot here, but the issue exists with different bayesplot plots as well. patchwork 1.0.0 works just fine with "home-made" faceted plots, so it's possible that this is bayesplot not conforming to standards. The grid package seems to be the origin of the layout.pos.row variable.

I don't know if it's of any use, but the following does not raise an error for nrow >= 2. Unfortunately, the resulting plot is "stacked" and the y-axis is inverted:

plot1 + plot1 + plot_layout(ncol = 2, nrow = 7)

[thomasp85]

Can you share the code used to generate the plot? Somehow the structure of the plot doesn't conform with the expectations...

[lindeloev]

Absolutely. I attach the data, plot_data.zip which is an mcmc.list. You can make the plot using

plot1 = bayesplot::mcmc_dens_overlay(plot_data, facet_args = list(ncol = 1))

The issue seems to be general for many (all?)

bayesplot::mcmc_[[type]](plot_data)

i.e., without facet_args too. E.g., mcmc_trace(), mcmc_dens(), etc.

[thomasp85]

weirdly this is an issue with the bayesplot theme...

plot1 + plot1 & theme_gray()

works

[lindeloev]

Confirmed! This is good enough for me to get on. I considered making some changes to that theme anyway, so this is a good excuse.

[thomasp85]

I've identified this to be due to strip.placement = 'outside' — no idea when that started to not work

[lindeloev]

Great. For future googlers, this is a simple fix/workaround for now:

plot1 + plot1 & theme(strip.placement = NULL)

[mdozmorov]

Googling for Error in grid.Call.graphics(C_setviewport, vp, TRUE) : invalid 'layout.pos.col' brought me to this issue. p1 + p2 & theme(strip.placement = NULL) doesn't eliminate it. grid.arrange(p1, p2, ncol = 2) works fine. Versions of grid 4.1.0, gridExtra 2.3, patchwork 1.1.