Hi, Regarding the fir1 function and the "blackmanharris" window;
If I specify an even number of coefficients (n) it produces a symmetric filter with an odd number of coefficients (n+1). If I specify an odd number of coefficients it produces a non symmetric filter with an even number of coefficients. octave:39> version ans = 3.0.5 octave:40> b=fir1(8, 0.5, "blackmanharris") b = Columns 1 through 8: -7.1851e-08 -2.8280e-03 2.6042e-04 2.7158e-01 6.1193e-01 2.7158e-01 2.6042e-04 -2.8280e-03 Column 9: -7.1851e-08 octave:41> b=fir1(7, 0.5, "blackmanharris") b = -3.8206e-04 -5.2516e-04 2.6785e-02 3.8140e-01 6.1393e-01 1.2791e-01 -1.5875e-02 -3.8206e-04 octave:42> Is there some trick to producing a symmetric "blackmanharris" windowed filter with an even number of coefficients? Regards, James. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
