How to save mat file from specific index
조회 수: 6 (최근 30일)
이전 댓글 표시
HI, I hope you are doing well.
I have the following Code It saves the frame as mat file name as frame8PSK001 to frame8PSK5000.
I want to save the frame starting from 8PSK5001 to So ON how can i save that
The folllowing for loop is used to save the mat files
for p=1:numFramesPerModType
How can i change the value
dataDirectory='C/NewFolder'
numFramesPerModType=5000
fileNameRoot = "frame";
% Check if data files exist
dataFilesExist = false;
if exist(dataDirectory,'dir')
files = dir(fullfile(dataDirectory,sprintf("%s*",fileNameRoot)));
if length(files) == numModulationTypes*numFramesPerModType
dataFilesExist = true;
end
end
if ~dataFilesExist
disp("Generating data and saving in data files...")
[success,msg,msgID] = mkdir(dataDirectory);
if ~success
error(msgID,msg)
end
for modType = 1:numModulationTypes
elapsedTime = seconds(toc);
elapsedTime.Format = 'hh:mm:ss';
fprintf('%s - Generating %s frames\n', ...
elapsedTime, modulationTypes(modType))
label = modulationTypes(modType);
numSymbols = (numFramesPerModType / sps);
dataSrc = helperModClassGetSourceAMC(modulationTypes(modType), sps, 2*spf, fs);
modulator = helperModClassGetModulatorAMC(modulationTypes(modType), sps, fs);
if contains(char(modulationTypes(modType)), {'B-FM','DSB-AM','SSB-AM'})
% Analog modulation types use a center frequency of 100 MHz
channel.CenterFrequency = 100e6;
else
% Digital modulation types use a center frequency of 902 MHz
channel.CenterFrequency = 902e6;
end
for p=1:numFramesPerModType
% Generate random data
x = dataSrc();
% Modulate
y = modulator(x);
% Pass through independent channels
rxSamples = channel(y);
% Remove transients from the beginning, trim to size, and normalize
frame = helperModClassFrameGenerator(rxSamples, spf, spf, transDelay, sps);
% Save data file
fileName = fullfile(dataDirectory,...
sprintf("%s%s%03d",fileNameRoot,modulationTypes(modType),p));
save(fileName,"frame","label")
end
end
else
disp("Data files exist. Skip data generation.")
end
댓글 수: 4
Matt J
2022년 2월 12일
Are you sure that's a good idea? Why not save all frames together in one file? The difficulty you're facing splitting them up will be encountered again when you need to read them back in.
참고 항목
카테고리
Help Center 및 File Exchange에서 Image Data Workflows에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!