Version 0.3.0 of the googleVis package for R has been released on CRAN on 20 October 2012. With this version we have been able to speed up the code considerably. The transformation of R data frames into JSON works significantly faster. The execution of the
gvisMotionChart function in the World Bank demo is over 35 times faster. Thanks to ideas by Wei Luo and in particular to Sebastian Kranz for providing the code.
Further, the plot function Unfortunately this caused an error message under RStudio and RGui on Windows. The argument has been removed again and
plot.gvis has gained a new argument
'browser'. This argument is passed on to the function
'browser' argument is by default set to the output of
getOption("browser") in an interactive session, otherwise to
'false'. This prevents
R CMD CHECK trying to open browser windows during the package checking process.
plot.gvis handles the check if R is running interactively internally. The bug has been fixed in googleVis-0.3.1, not yet available on CRAN, but on our project download page. Thanks to Henrik Bengtsson and Sebastian Kranz for their comments, suggestions and quick response.
Should you find any further issues or bugs with the new version, then please drop me a line or add them to our issues list.
Sebastian also suggested to add arguments to
gvisMotionChart allowing the user to set the defaults for the various visible dimensions, namely:
xvar, yvar, colorvar and
sizevar. Here is a simple example using the new optional arguments:
|Screen shot of a motion chart|
The defaults of those new arguments are set to “”, which means
gvisMotionChart will assume the columns in order of your data frame. This is the same behaviour as in the previous versions of
Thanks to feedback from Erik Bülow the mechanism to load the Google API is now handeled via a secure https-connection rather than http.
Finally, we included a new example in the help file of
gvisMap, demonstrating how to include html code into tooltips: