MATLAB Programming

Accessing Files with Memory-Mapping
m = memmapfile('mybinary.bin', 'Offset', 1024, ...
'Format', 'double', 'Repeat', 1000);
Get data associated with the map and plot the FFT of the first 1000 values of
the map. This is when the map is actually created, because no data has been
referenced until this point:
plot(abs(fft(m.Data(1:1000))));
Get information about the memory map:
mapStruct = get(m)
mapStruct =
Filename: 'd:\matlab\mfiles\mybinary.bin'
Writable: 0
Offset: 1024
Format: 'double'
Repeat: 1000
Data: [1000x1 double]
Change the map, but continue using the same file:
m.Offset = 4096;
m.Format = 'single';
m.Repeat = 800;
Read from a different area of the file, and plot a histogram of the data. This
maps a new region and unmaps the previous region:
hist(m.Data)
Writing to a Mapped File
Writing to a mapped file is done with standard MATLAB subscripted
assignment commands. To write to a particularlocationinthefilemapped
to memmapfile object m, assign the value to the m.Data structure array index
andfieldthatmaptothatlocation.
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