Using the C Math Library

Assigning Values to Elements in a Field 

By using mlfIndexAssign() you can also modify array data contained in a structure field. You must specify the field name and the type of indexing to perform on the contained array. For example, the following call to mlfIndexAssign() replaces a 3-by-3 subarray of the image data of the ninth image, with the data in the 3-by-3 array x. (You might do this as part of some image processing operation.)

mlfIndexAssign(&images,
               "(?).image(?,?)",
               mlfScalar(9),
               mlfColon(mlfScalar(1), mlfScalar(3), NULL),
               mlfColon(mlfScalar(2), mlfScalar(4), NULL),
               x);

images(9).image(1:3,2:4) = x performs the same operation in MATLAB.

Assigning Values to a Structure Field

Referencing a Single Structure in a Structure Array