eroor while processing the data

I am working on ecg data project MIT BIH database

I got code from

http://www.mathworks.com/matlabcentral/fileexchange/32214-r-peak-detection-using-dwt-and-classification-of-arrhythmia-using-bayesian-classifier/content/wavelet5point.m

and for reading signal i used rrdata.m

now while i try to read data for 100,101,102etc for some data i get error as

Attempted to access f(2053); index out of bounds because numel(f)=2048.

Error in ==> finalnew1 at 143 y=f(j)-f(j+1);

while some other datas work

can u please tell where i had done mistake

i have uploaded the .mat file

http://www.sendspace.com/file/effuq7