textscan and multidimensional arrays

2 vues (au cours des 30 derniers jours)
Ninetrees
Ninetrees le 19 Sep 2011
I have a text file that contains recordS 600 bytes long. The data is mixed: date, time, chars, ints, fps.
I am using textscan for the first time. I currently set up a format string for the whole record that seems to be working correctly...the file contains ~4000 records (varies). I am testing with a 3-record subset.
Some of the data is related. In one instance, 3 sequential values are values comprise 3D vector. textscan places these values in vectors in cells, so that I have (for example) c{39} contains the x-component, &c. I now do this A3Dvec = [ c{39} c{40} c{41} ] A3Dvec = A3Dvec' which seems a bit awkward to me because I used textscan in the first place for its speed and convenience (don't have to loop through the file).
At least it works. Is there a better way?
I hit a snag when I considered the rotation matrices. Here I have 9 sequential values that define a rotation matrix.
1 2 3
4 5 6
7 8 9
It seems to me that I can use a series of steps to create 3D matrices and then transpose and combine them into the RotMatrix array (not sure at this point), but that seems like I am overthinking the problem.
Am I missing a step in the way I use textscan? Is there a better way to create A3Dvec? How should I create RotMatrix, which is an array 1:nrecords of RotMatrix?
Thanks, ~R~

Réponses (0)

Catégories

En savoir plus sur Logical dans Help Center et File Exchange

Produits

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by