1 files changed, 29 insertions, 0 deletions
diff --git a/sourcecodes/bnt-master/KPMtools/myunion.m b/sourcecodes/bnt-master/KPMtools/myunion.m
new file mode 100644
index 00000000..0f358020
--- /dev/null
+++ b/sourcecodes/bnt-master/KPMtools/myunion.m
@@ -0,0 +1,29 @@
+function C = myunion(A,B)
+% MYUNION Union of two sets of positive integers (much faster than built-in union)
+% C = myunion(A,B)
+
+if isempty(A)
+  ma = 0;
+else
+  ma = max(A);
+end
+
+if isempty(B)
+  mb = 0;
+else
+  mb = max(B);
+end
+
+if ma==0 && mb==0
+  C = [];
+elseif ma==0 && mb>0
+  C = B;
+elseif ma>0 && mb==0
+  C = A;
+else
+  %bits = sparse(1, max(ma,mb));
+  bits = zeros(1, max(ma,mb));
+  bits(A) = 1;
+  bits(B) = 1;
+  C = find(bits);
+end