diff -up ./libs/base/include/mrpt/math/ops_containers.h.gcc12 ./libs/base/include/mrpt/math/ops_containers.h
--- ./libs/base/include/mrpt/math/ops_containers.h.gcc12	2016-04-21 18:55:39.000000000 -0400
+++ ./libs/base/include/mrpt/math/ops_containers.h	2022-04-17 22:06:41.430328212 -0400
@@ -302,7 +302,7 @@ namespace mrpt
 			for (size_t i=0;i<N;i++)
 				for (size_t j=0;j<M;j++)
 					out_mean[j]+=v[i][j];
-			out_mean*=N_inv;
+			out_mean= out_mean * N_inv;
 
 			// Second: Compute the covariance
 			//  Save only the above-diagonal part, then after averaging
@@ -320,7 +320,7 @@ namespace mrpt
 			for (size_t j=0;j<M;j++)
 				for (size_t k=j+1;k<M;k++)
 					out_cov.get_unsafe(k,j) = out_cov.get_unsafe(j,k);
-			out_cov*=N_inv;
+			out_cov= out_cov * N_inv;
 		}
 
 		/** Computes the covariance matrix from a list of values given as a vector of vectors, where each row is a sample.
@@ -332,7 +332,7 @@ namespace mrpt
 		template<class VECTOR_OF_VECTOR, class RETURN_MATRIX>
 		inline RETURN_MATRIX covVector( const VECTOR_OF_VECTOR &v )
 		{
-			std::vector<double>   m;
+			CVectorDouble m;
 			RETURN_MATRIX C;
 			meanAndCovVec(v,m,C);
 			return C;