Info
This question is closed. Reopen it to edit or answer.
speeding up the proccess
2 views (last 30 days)
Show older comments
hello,
I have a wavfile that I read with 'wavread' and I want to apply some weighting function on each channel. everything is working ok, but it takes almost 2 minutes to through the for loop. Any ideas as to how to speed things up? the sampling frequency fs=32kHz and duration is 10secs.
[y,fs] = wavread('C:\Desktop\testwavfile')
y = y';
t =0:1/fs:length(y)/fs-1/fs;
t = t';
gain1 = 0:4/fs:40-4/fs; %this is level
gain2 = 20:4/fs:60-4/fs;
gain3 = 40:-4/fs:0+4/fs;
t1 = 8*fs;
slope = (gain2(1)-gain2(t1))/t1;
con = slope+gain2(1);
slopeout = (gain1(5*fs)-gain1(t1))/t1;
conout = slopeout+gain1(5*fs);
%creates a weighting function
for iTime = 1:t1
temp(iTime) = -slope*iTime+con; %#ok<*SAGROW>
out(iTime) = -slopeout*iTime+conout;
end
temp(t1+1:length(y)) = 6.5*gain3(t1+1:length(y));
out(t1+1:length(y)) = 4*gain3(t1+1:length(y));
3 Comments
Matt Kindig
on 25 Apr 2013
In fact, the for loop doesn't even appear to be necessary. You can define both of them as:
temp(1:t1) = -slope*iTime+con;
out(1:t1) = -slopeout*iTime+conout;
and eliminate the for loop entirely.
Answers (0)
This question is closed.
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!