Added frame::to_series(Ex)

tedmiddleton · Apr 29, 2023 · d8aefda · d8aefda
1 parent 19e45d3
commit d8aefda
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Showing 2 changed files with 14 additions and 0 deletions.
diff --git a/mainframe/frame.hpp b/mainframe/frame.hpp
@@ -579,6 +579,10 @@ class frame
     template<size_t Ind>
     double stddev(columnindex<Ind>) const;
 
+    template<typename T, typename Ex>
+    series<T>
+    to_series(const std::string& column_name, Ex expr) const;
+
     std::vector<std::vector<std::string>>
     to_string() const;
 

diff --git a/mainframe/impl/frame.hpp b/mainframe/impl/frame.hpp
@@ -804,6 +804,16 @@ frame<Ts...>::stddev(columnindex<Ind>) const
     return s.stddev();
 }
 
+template<typename... Ts>
+template<typename T, typename Ex>
+series<T>
+frame<Ts...>::to_series(const std::string& series_name, Ex expr) const
+{
+    frame<Ts..., T> plust = append_column<T>(series_name, expr);
+    columnindex<sizeof...(Ts)> ci;
+    return plust.column(ci);
+}
+
 template<typename... Ts>
 std::vector<std::vector<std::string>>
 frame<Ts...>::to_string() const