fixed capacity suggestion verbiage

Author: Gillgamesh

include/sketch.h

@@ -82,8 +82,8 @@ class Sketch {
    * @return              The length of the vector to sketch
    */
   static vec_t calc_vector_length(node_id_t num_vertices) {
-    // return ceil(double(num_vertices) * (num_vertices - 1) / 2);
-    return num_vertices * 2;
+    return ceil(double(num_vertices) * (num_vertices - 1) / 2);
+    // return num_vertices * 2;
     // return 50; // round to something thats approx 2^6
     // return 3;
     // return 15;

include/sketch/sketch_columns.h

@@ -38,9 +38,8 @@ class FixedSizeSketchColumn {
   uint8_t get_depth() const;
   void serialize(std::ostream &binary_out) const;
 
-  static uint8_t suggest_capacity(size_t num_vertices) {
-    size_t num_edges = num_vertices * (num_vertices - 1) / 2;
-    return static_cast<uint8_t>(1 + ceil(log2(num_edges)));
+  static uint8_t suggest_capacity(size_t num_indices) { 
+    return static_cast<uint8_t>(2 + ceil(log2(num_indices)));
   }
 
   void reset_sample_state() {
@@ -107,7 +106,7 @@ class ResizeableSketchColumn {
     //no-op
   };
 
-  static uint8_t suggest_capacity(size_t num_vertices) {
+  static uint8_t suggest_capacity(size_t num_indices) {
     return 4;
   }
 
@@ -171,7 +170,7 @@ class ResizeableAlignedSketchColumn {
     //no-op
   };
 
-  static uint8_t suggest_capacity(size_t num_vertices) {
+  static uint8_t suggest_capacity(size_t num_indices) {
     return 4;
   }