Index exceeds matrix dimensions.,i keep on getting this error will anybody correct it 4 me?

[s Fs nb]=wavread('C:\Users\Thara\Desktop\PROJECT\DataIITKGP\speaker7\normal\7.normal.1.wav.split\000001one.wav');
y=resample(s,1,2);
Fs=Fs/2;
d=y./max(abs(y));
UvStartIdx=[127 2578 6082 7390 8848  12950 16196 ];
UvEndIdx=[1681 5205  6675 8194 12227 15301 19807];
PitchModFact=[1.03 1.01 1.02 1.03 1.01 1.05 1.03];
DurModFact=[0.78 0.7 0.75 0.84 0.71 0.9 0.82];
buf1=[];
b=[];

for i=1:7
    [modres]=EpochProsodyModResidualModFn(y,Fs,PitchModFact(i),DurModFact(i));
    size(modres)
 buf1=[buf1;modres(UvStartIdx(i):UvEndIdx(i))'];
    if i+1<=length(UvStartIdx) 
        buf1=[buf1;modres(UvEndIdx(i):UvStartIdx(i+1))'] ;
        smtlb = sgolayfilt(modres(UvEndIdx(i):UvStartIdx(i+1))',3,41);
        b=[b;smtlb];
 figure;plot(smtlb);
        sound(smtlb,Fs)
    end
end
 buf1=[buf1;modres(UvEndIdx(i):end)'];

[Walter Roberson]

It would help if you told us which line the problem was occurring on.

In your code, what do you expect to have happen if the file is not at least 19807 long ?

It is not clear to me that your code is taking into account the possibility that the file is multiple channels (stereo) ?

[Sony]

buf1=[buf1;modres(UvStartIdx(i):UvEndIdx(i))']; error is happening on this line
size(s)=40280
size(y)=20140 
 size(modres)= 1       16783

Answer 1

[Matt J]

It happens when you do things like this

>> a=1:7; a(8)
Index exceeds matrix dimensions.

Use DBSTOP to trap the error.

Answer 2

[Walter Roberson]

You unconditionally try to access

modres(UvStartIdx(i):UvEndIdx(i))

for all "i" values possible for those two arrays. The maximum UvEndIdx value is 19807 so you are attempting to access up to index 19807 of modres(). However, your modres is not that long.

We have no information about your EpochProsodyModResidualModFn function, so we cannot tell you why your modres is coming out shorter than you expect.