matlab-upgrade-mex-ic
Upgrade C, C++, and Fortran MEX source files from the Separate Complex (SC) API to the Interleaved Complex (IC) API. Use when converting mxGetPr/mxGetPi to mxGetComplexDoubles, migrating MEX files to -R2018a, adding MX_HAS_INTERLEAVED_COMPLEX guards for SC/IC guarded builds, or modernizing legacy MEX code that uses mxGetData/mxSetData/mxGetImagData/mxSetImagData. Covers C (.c), C++ (.cpp, .cxx), and Fortran (.F, .f90) MEX functions. Triggers on: interleaved complex, IC MEX, mex upgrade, mex migration, separate complex, mxGetPi, mxGetPr replacement, -R2018a, complex MEX, Fortran MEX, .F MEX fil
npx skills add matlab/matlab-agentic-toolkit --skill matlab-upgrade-mex-ic --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Upgrade MEX Files to Interleaved Complex API Convert C, C++, and Fortran MEX source files from the Separate Complex (SC) API to the Interleaved Complex (IC) API, following the MathWorks upgrade workflow with guardrails for SC/IC guarded builds using `MX_HAS_INTERLEAVED_COMPLEX`, required vs recommended changes, and verification. ## When to Use - User has a C, C++, or Fortran MEX file using `mxGetPr`/`mxGetPi`, `mxGetData`/`mxGetImagData`, or `mxSetPr`/`mxSetPi` - User wants to build with `mex -R2018a` - User asks about interleaved complex, IC MEX, or modernizing MEX code - User has legacy MEX code from File Exchange, GitHub, or pre-R2018a era - User has a C++ MEX file (`.cpp`, `.cxx`) using the C Matrix API (`mxGetPr`/`mxGetPi`, etc.) - User has a Fortran MEX file (`.F`, `.f90`) using `mxGetPr`/`mxGetPi` via `%val()` pointers - User reports a MEX function is slow on large complex arrays (call overhead, not loop) - User asks how to improve MEX performance for complex data ## When NOT to Use - Writing a new MEX function from scratch — no conversion needed, but advise the user to use IC APIs (`mxGetDoubles`, `mxGetComplexDoubles`, etc.) from the start for better performance on compl
- When to Use
- When NOT to Use
- Workflow
- Step 1: Pre-Upgrade Verification
- Step 2: Output File Decision
- Step 3: Decision Point — IC-Only or SC/IC Guarded?
- Step 4: Iterative Refactoring
- Reducing Code Duplication in SC/IC Guarded Mode
- Step 5: Build
- Step 6: Verify
- Step 7: Document
- Performance Benefits of IC Conversion
- Why IC Is Faster
- Additional Performance Advantages
What does the matlab-upgrade-mex-ic skill do?
Upgrade C, C++, and Fortran MEX source files from the Separate Complex (SC) API to the Interleaved Complex (IC) API. Use when converting mxGetPr/mxGetPi to mxGetComplexDoubles, migrating MEX files to -R2018a, adding MX_HAS_INTERLEAVED_COMPLEX guards for SC/IC guarded builds, or modernizing legacy MEX code that uses mxGetData/mxSetData/mxGetImagData/mxSetImagData. Covers C (.c), C++ (.cpp, .cxx), and Fortran (.F, .f90) MEX functions. Triggers on: interleaved complex, IC MEX, mex upgrade, mex migration, separate complex, mxGetPi, mxGetPr replacement, -R2018a, complex MEX, Fortran MEX, .F MEX fil
How do I install it?
Run `npx skills add matlab/matlab-agentic-toolkit --skill matlab-upgrade-mex-ic --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From matlab/matlab-agentic-toolkit, a repository with 868 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.