Time index
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>> help timeidx
TIMEIDX returns numeric index given time string.
D = TIMEIDX(T) returns index value in relative days which is suitable for
DATENUM math. To work in hours multiply by 24, for seconds multiply
by 24*3600, etc. T can be a time string (DD:HH:MM:SS) where DD, HH
and MM are incrementally optional and SS can include a decimal
fraction. For multiple time values T must be a cell array of strings.
The result is the same size/shape but type DOUBLE.
D = TIMEIDX(T1,T2) returns a range of values. T1 and T2 are individual
time strings (as above) and the result is a 1x2 DOUBLE array.
N = TIMEIDX(...,FS) instead returns index values in sample units relative
to the beginning of a record where FS is samples/second. Sample
values are rounded to integer values. Time 0 corresponds to sample 1.
Example 1: operation times out after 5 minutes
t2 = now+timeidx('5:00')*24*3600;
while ~done && now<t2
%wait for something else to happen
end
if ~done
error('Operation failed to complete in 5 minutes')
end
Example 2: specify portion of WAV file to read
range = timeidx('2.5','1:02.5',Fs); %1 minute after 2.5 second delay
x = wavread('myfile.wav',range);
See also DATENUM, DATESTR
Free download from Shareware Connection - >> help timeidx TIMEIDX returns numeric index given time string. D = TIMEIDX(T) returns index value in relative days which is suitable for DATENUM math. To work in hours multiply by 24, for seconds multiply by 24*3600, etc.
Version: 1.0 | Size: 10 KB | Platform: Matlab, Scripts
Released Date: 13-05-2013 | Rating: 0 | Title: Time index
Author Url: http://www.mathworks.com
Program Info Url: http://www.mathworks.com
Download Url: http://www.mathworks.com/matlabcentral/fx_files/21891/3/timeidx.zip
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