Add a scatter_chart function

[charliejhadley]

There is already a scatter_plot function which is designed for "point density" comparisons and specifically supports opacity to demonstrate trace overlaps.

scatter_chart will instead focus on providing different markers per trace.

[marcvanderpeet12]

@martinjhnhadley I tried installing your package cause Im following your course. However running: install_github("martinjhnhadley/oidnChaRts") gives me the following error:

install_github("martinjhnhadley/oidnChaRts") Downloading GitHub repo martinjhnhadley/oidnChaRts@master from URL https://api.github.com/repos/martinjhnhadley/oidnChaRts/zipball/master Installing oidnChaRts "C:/PROGRA~1/R/R-34~1.4/bin/x64/R" --no-site-file --no-environ \ --no-save --no-restore --quiet CMD INSTALL \ "C:/Users/Marc/AppData/Local/Temp/RtmpQ1HVLW/devtools209c81e3d2c/ox-it-oidnChaRts-20653d6" \ --library="C:/Users/Marc/R/win-library/3.4" --install-tests

Het systeem kan het opgegeven pad niet vinden.

• installing source package 'oidnChaRts' ... R data * moving datasets to lazyload DB tests preparing package for lazy loading * help installing help indices converting help for package 'oidnChaRts' finding HTML links ... done data_geo_bubble_chart html
  data_geo_lines_plot html
  data_geo_marker_plot html
  data_line_chart html
  data_scatter_plot html
  data_stacked_bar_chart html
  data_world_shapefiles html
  journey_termini_data html
  map-calendar-heatmap html
  map-geo-bubble-chart html
  map-geo-choropleth-chart html
  map-geo-lines-plot html
  map-geo-marker-plot html
  map-line-chart html
  map-scatter-plot html
  map-stacked-bar-chart html
  oidnChaRts html
  building package indices installing vignettes testing if installed package can be loaded ** arch - i386 arch - x64
• DONE (oidnChaRts) In R CMD INSTALL Installation failed: Command failed (1)

Any thoughts?