Update 06-list-datasets-by-plot.Rmd

Author: dlebauer

sensors/06-list-datasets-by-plot.Rmd

@@ -11,7 +11,7 @@ plot boundaries stored within betydb with the file-based data products available
 from the workbench or Globus.
 
 * if are using Rstudio and want to run the Python code chunks, the R package "reticulate" is required
-* use `pip install terrautils` to install the terrautils Python library
+* use `pip3 install terrautils` to install the terrautils Python library
 
 ## Getting started