Differences

This shows you the differences between two versions of the page.

--- exercise:prog:spinglass [2020/09/01 06:09] – [System representation] chunchung
+++ exercise:prog:spinglass [2020/11/06 03:15] (current) – [System representation] chunchung
@@ Line 14: / Line 14: @@
 double * j = new double [sz*(sz-1)/2];
 </code>
-Since the coupling involves two spins, it is instinctive to use a two-dimensional array for ''j''. However, in a more general view, it is clearer to serialize the iteration into one over links instead of two nodes.
+Since the coupling involves two spins, it is instinctive to use a two-dimensional array for ''j''. However, in a more general view, it is clearer to serialize the iteration into one over links instead of two nodes. This also reduces redundancy.
+Since we are using %%C++%%, we will use the ''vector'' class in place of array pointers:
+<code c++>
+std::vector<int> spin;
+std::vector<double> h;
+std::vector<double> j;
+</code>
+For couplings, we use ''struct Link'' to keep track of the nodes involved in each bond.
+<code c++>
+struct Link {
+	int n0;
+	int n1;
+};
+std::vector<Link> lnks;
+</code>
 =====Data storage=====
 For portability of data, we use [[https://www.hdfgroup.org/solutions/hdf5/|HDF5]] library. Here, we try the C++ binding of the library.

Lab Comp Bio Net