Histograms (y-label and grouping) about bayesplot HOT 3 CLOSED

On Thursday, October 13, 2016, milkha [email protected] wrote:

1 - For histograms (e.g., in ppc_stat, and ppc_hist) it would be good to
have a y-label which shows the counts (not sure what is plotted currently,
counts or density). This is useful specially in ppc_stat_group, because it
gives you an extra information about the size of each group.

Yeah, I'm not sure seeing the values is ever super useful (for this
particular plot) when it's density on the y-axis (that's what it is now),
but I agree it could be useful for counts. Maybe it should just always be
count, that way if you use + yaxis_text() it will be meaningful for count
variables. Alternatively it could be an argument to the function, e.g.

ppc_stat_grouped(..., freq = TRUE),

which is how it is for hist() in base R.

2 - It would be good to have a ppc_hist_group function for comparing the
distributions at a finer level.

Yeah I agree. Officially on the to-do list.

Thanks for the suggestions.

from bayesplot.

@milkha I just changed the y-axis to counts in 54aaee2 for any PPC plot that is a histogram. The y-axis text is still off by default because it's really only useful in some cases, but it can easily be turned on using yaxis_text(), e.g.

ppc_stat(y, yrep, stat = "median") + yaxis_text()

should now show counts on the y-axis if you reinstall.

I also moved ppc_hist_grouped to it's own issue (#41).

from bayesplot.

Actually, I added a freq argument, defaulting to TRUE. So count is the default but setting freq=FALSE will put density on the y-axis

from bayesplot.