Differences

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--- general_commands [2008/01/24 13:51] – heidi
+++ general_commands [2011/03/07 16:54] (current) – heidi
@@ Line 1: / Line 1: @@
 ====== general commands ======
+  * ''install.packages("packageName")'': download and install a package --> start R as following: ''Rgui.exe --internet2''
+  * ''help(package=XML)'': information about the package XML
+  * ''str(a)'': display the structure of a object
+  * ''table(x)'': returns a table with the numbers of the different values of x
   * ''[]'': subscript a string
   * ''as.matrix.data.frame(''data'')'': convert data to a matrix