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## Re: [Tftb-help] Urgent Help needed on wavelet (fwd)

**From**: |
Eric Chassande-Mottin |

**Subject**: |
Re: [Tftb-help] Urgent Help needed on wavelet (fwd) |

**Date**: |
Wed, 5 Sep 2007 10:23:28 +0200 (CEST) |

`Thanks for your prompt reply. I have some ideas on what you are talking
``about and I started agree with you. I have re-read the source that I
``have got, and I realise that the "tau" is defined as the time scale in
``his defintion, which I think is different than "a" in euqation 1 which
``equals to "fo/f" or "f/fo", and thus results a different
``multi-resolution features.
`

`Ok, I understand your point, now. I was wrong yesterday when I said that
``tfrrmsc computes exactly W(tau,omega). tfrrmsc computes a time-scale
`representation (t,a) like in the Eq (1) of your previous message.
you want a 1/scale-frequency representation.

`I have tried to compute my work using tfrrmsc, and it results a good
``time resolution at high frequency region, and poor time resolution when
``frequency is low.
`

`Another question is, is there anyway for me to compute the
``multi-resolution properties like what the paper describe? Do I need to
``go into the m file and change it?
`

`yes, you'll have to. I would extract from tfrrmsc.m the part of the code
``which calculates tfr and adapt the loops so that you implement Eq (3).
`

`W(tau,omega) = (tau^-0.5) x Integrate [f(t) x h(t/tau) x exp(j*omega*tau)] dt
``(3)
`

eric.

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**Re: [Tftb-help] Urgent Help needed on wavelet (fwd)**,
*Eric Chassande-Mottin* **<=**