MATLAB Programming

6 Data Import and Export
ans =
166x1 struct array with fields:
x
y
Examine one structure in the array to show the format of each field:
d(3)
ans =
x: [5x8 uint16]
y: [4x5 double]
Now read the x and y fields of that structure from the file. MATLAB formats
the first block of data as a 5-by-8 matrix of uint16, asspecifiedintheFormat
property, and the second block as a 4-by-5 matrix of double:
d(3).x
ans =
34432 47500 19145 16868 38165 47956 35550 16853
60654 51944 16874 47166 35397 58072 16850 56576
51075 16876 12471 34369 8341 16853 44509 57652
16863 16453 6666 11480 16869 58695 36217 5932
57883 15551 41755 16874 37774 31693 54813 16865
d(3).y
ans =
1.0e+009 *
3.1229 1.5909 2.9831 2.2445 1.1659
1.3284 3.0182 2.6685 3.7802 1.0837
3.6013 2.3475 3.4137 0.7428 3.7613
2.4399 1.9107 4.1096 4.2080 3.1667
Example 4 — Modifying Map Parameters
This example plots the Fourier transform output of data read from a file via a
memory map. It then modifies several parameters of the existing map, reads
from a different part of the data file, and plots a histogram from that data.
Create a memory-mapped object, mapping 1,000 elements of type double
starting at the 1025th byte:
6-58