added helper function to make view of vector

include/aare/NDView.hpp

@@ -184,4 +184,9 @@ std::ostream& operator <<(std::ostream& os, const NDView<T, Ndim>& arr){
 }
 
 
+template <typename T>
+NDView<T,1> make_view(std::vector<T>& vec){
+    return NDView<T,1>(vec.data(), {static_cast<int64_t>(vec.size())});
+}
+
 } // namespace aare

src/NDView.test.cpp

@@ -191,3 +191,15 @@ TEST_CASE("compare two views") {
 
     REQUIRE((view1 == view2));
 }
+
+
+TEST_CASE("Create a view over a vector"){
+    std::vector<int> vec;
+    for (int i = 0; i != 12; ++i) {
+        vec.push_back(i);
+    }
+    auto v = aare::make_view(vec);
+    REQUIRE(v.shape()[0] == 12);
+    REQUIRE(v[0] == 0);
+    REQUIRE(v[11] == 11);
+}

src/decode.cpp

@@ -90,7 +90,7 @@ void apply_custom_weights(NDView<uint16_t, 1> input, NDView<double, 1> output, c
     // Apply custom weights to each element in the input array
     for (ssize_t i = 0; i < input.shape(0); i++) {            
         double result = 0.0;
-        for (ssize_t bit_index = 0; bit_index < weights_powers.size(); ++bit_index) {
+        for (size_t bit_index = 0; bit_index < weights_powers.size(); ++bit_index) {
             result += ((input(i) >> bit_index) & 1) * weights_powers[bit_index];
         }
         output(i) = result;