Add README.md

README.md

@@ -0,0 +1,45 @@
+# Stand equality
+
+## Mutate individual tree records
+
+Calculate a new column from values recorded from an individual tree.
+
+* 5 cm diameter classes
+* diameter increment
+
+```R
+df |>
+  mutate(newColumn = function(Value)
+```
+
+## Summarise functions
+
+Calculate a single value for a group using `group_by() |> summarise()`
+
+* q value
+* Gini coefficient
+* Shannon Diversity Index
+* SDI
+* transition period (C&A used cores)
+* annual recruitment
+* TH (filter just the height data)
+
+```R
+df |>
+  group_by(Plot, Year) |>
+  summarise(
+    measure = function(Value)
+  )
+```
+
+## Mutate aggregate values
+
+Calculate a new column from group-level aggregate values
+
+* form class
+* form height
+
+```R
+df |>
+  mutate(newColumn = function(Value)
+```