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[DAPHNE-#822] Added MatrixMarket write support #832

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[DAPHNE-#822] Added MatrixMarket write support #832

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ldirry
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@ldirry ldirry commented Sep 25, 2024

  • Write support for CSRMatrix in coordinate system
  • Write support for DenseMatrix in array format
  • Support for recognizing symmetric, skew-symmetric matrices, and storing them accordingly in .mtx
  • Added testcases, calling readMM, then writeMM and then comparing if the files are still the same

@ldirry ldirry force-pushed the 882-mm-write-support branch 3 times, most recently from 9714923 to bfa0a93 Compare October 2, 2024 22:23
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[DAPHNE-daphne-eu#822] Added MatrixMarket write support
e199dcc 
- Write support for CSRMatrix in coordinate system
- Write support for DenseMatrix in array format
- Support for recognizing symmetric, skew-symmetric matrices, and storing them accordingly in .mtx
- Added testcases, calling readMM, then writeMM and then comparing if the files are still the same
corepointer
corepointer reviewed Oct 7, 2024
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Generally, this is looking good. Maybe in addition to the things I mentioned in the inline comments to the code, you could separate your code into header and cpp file?

src/runtime/local/io/WriteMM.h
for (size_t j = 0; j < rows; ++j) {
size_t idx = j * cols + i;
if (strcmp(field, MM_REAL_STR) == 0)
f << std::scientific << std::setprecision(13) << values[idx] << std::endl;
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Would this value be a candidate for an item in our user configuration?

src/runtime/local/io/WriteMM.h
Comment on lines +229 to +231
if (strcmp(symmetry, MM_GENERAL_STR) == 0) {
nnz = arg->getNumNonZeros();
} else {
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I think I don't fully understand why the computation above is needed if you return getNumNonZeros or fail.

test/api/cli/io/WriteTest.cpp
#include <string>

const std::string dirPath = "test/api/cli/io/";
const std::string dirPath2 = "test/runtime/local/io/";

bool compareFiles(const std::string &filePath1, const std::string &filePath2) {
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Maybe this one could go into Utils.h? Ideally with a documenting comment (doxygen format) above the function signature ;-)

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@ldirry @corepointer