mex cplusplus matlab::data::RowMajorIterator
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This is an example of iterating through a matrix in Matlab's default column-major setup
void operator()(matlab::mex::ArgumentList outputs, matlab::mex::ArgumentList inputs)
{
const matlab::data::TypedArray<double> data = std::move(inputs[0]);
for (auto it = data.begin(); it != data.end();)
{
std::cout << *it++ << " ";
}
}
How can I do the same to iterate row-major with a matlab::data::RowMajorIterator iterator?
回答（1 个）
Madheswaran
2025-3-26
You can use the row-major iterator by utilizing the RowMajor class as follows:
void operator()(matlab::mex::ArgumentList outputs, matlab::mex::ArgumentList inputs)
{
const matlab::data::TypedArray<double> data = std::move(inputs[0]);
// Option 1: Using explicit iterators
for (auto it = matlab::data::RowMajor::begin<double>(data);
it != matlab::data::RowMajor::end<double>(data);)
{
std::cout << *it++ << " ";
}
// Option 2: Using range-based for loop with writableElements
auto range = matlab::data::RowMajor::writableElements<double>(data);
for (const auto& elem : range) {
// ... Your code ...
}
}
Make sure to include "RowMajorIterator.hpp" in your header files, and add the appropriate include path when compiling:
mex yourfile.cpp -I"matlabroot/extern/include/MatlabDataArray"
replace 'matlabroot' with abosolute path of your 'matlabroot' in the above command.
For more information, refer to the following documentations:
- https://mathworks.com/help/matlab/apiref/matlab.data.rowmajor.html
- https://mathworks.com/help/matlab/ref/mex.html
Hope this helps!
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