Vectorized FIND with 'FIRST' option
Up to now, to find the first non-zero element of a matrix along a column (for example) user might:
1. Use for-loop with FIND command
for j=1:size(A,2)
... = find(A(:,j), 1, 'first');
end
2. Use other vectorized methods, often time not very straight-forwards (MAX, LOGICAL, SPARSE, etc...). This method creates temporary arrays and scan such the arrays few times while doing some calculation.
3. Write the basic FOR-LOOP algorithm to accomplish the task.
The FINDFIRST command does just the same, but implemented using MEX engine which should be faster than any of the above. It can handle 'FIRST', 'LAST' option, and return more than one FIND count.
NOTE: not yet tested on Linux (gcc)
Cita come
Bruno Luong (2024). Vectorized FIND with 'FIRST' option (https://www.mathworks.com/matlabcentral/fileexchange/24641-vectorized-find-with-first-option), MATLAB Central File Exchange. Recuperato .
Compatibilità della release di MATLAB
Compatibilità della piattaforma
Windows macOS LinuxCategorie
- MATLAB > Mathematics > Sparse Matrices >
Tag
Riconoscimenti
Ispirato: csearch
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Scopri Live Editor
Crea script con codice, output e testo formattato in un unico documento eseguibile.