1 files changed, 7 insertions, 1 deletions
diff --git a/utils/fast_sparse_vector.h b/utils/fast_sparse_vector.h
index 8fe6cb3d..2c49948c 100644
--- a/utils/fast_sparse_vector.h
+++ b/utils/fast_sparse_vector.h
@@ -178,6 +178,12 @@ class FastSparseVector {
   T l2norm() const {
     return sqrt(l2norm_sq());
   }
+  T pnorm(const double p) const {
+    T sum = T();
+    for (const_iterator it = begin(), e = end(); it != e; ++it)
+      sum += pow(fabs(it->second), p);
+    return pow(sum, 1.0 / p);
+  }
   // if values are binary, gives |A intersect B|/|A union B|
   template<typename S>
   S tanimoto_coef(const FastSparseVector<S> &vec) const {
@@ -373,7 +379,7 @@ class FastSparseVector {
     }
     ar & eff_size;
     while (it != this->end()) {
-      const std::pair<const std::string&, const T&> wire_pair(FD::Convert(it->first), it->second);
+      const std::pair<std::string, T> wire_pair(FD::Convert(it->first), it->second);
       ar & wire_pair;
       ++it;
     }