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## how to express sinc * exp?

**From**: |
eric |

**Subject**: |
how to express sinc * exp? |

**Date**: |
Thu, 09 Mar 2000 01:45:52 -0900 |

Dear octave expert:
In matlab toolbox siganl processing:
b=0.4*sinc(0.4*(-25:25));
[H,w]=freqz(b,1,512,2);
plot(w,abs(H));
work
but if I want to let b be the product of sinc and
2*exp(-i*pi)+exp(-i*3*pi)
b=0.4*sinc*(2*exp(-i*pi)+exp(-i*3*pi))(0.4*(-25:25));
is not work,
I got
x undefined near line 24 column 37
..................
etc.
how to modify it to work?
need and thanks your help
Eric(address@hidden)
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**how to express sinc * exp?**,
*eric* **<=**