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<p>Hey,</p>
<p>Thanks, I didn't see that. This is actually exactly what I
wanted, so that's great! In my work I normalise the DPSS by their
area because I need them all to have the same integrated spectral
weight. I'll have another look at the multitaper technique and
maybe I'll come across a different form of modulation there, in
which case I'd let you know.</p>
<p>Thanks again,</p>
<p>Virginia<br>
</p>
<br>
<div class="moz-cite-prefix">On 08/04/18 23:29,
<a class="moz-txt-link-abbreviated" href="mailto:3ukip0s02@sneakemail.com">3ukip0s02@sneakemail.com</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:26906-1523194162-242017@sneakemail.com">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On <span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Sun,
8 Apr 2018 08:14:47 +1000</span>, <span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Virginia
Frey </span>wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">The current
implementation of Slepians in scipy's signal module only<br>
offers the zeroth order, so it is not possible to use for
e.g. the<br>
multitaper spectral analysis. In addition to that, because
of the way<br>
the eigensystem is solved, it breaks with a MemoryError
when using high<br>
numbers of points (i.e. a few thousand). The request for
high numbers of<br>
points is not unreasonable: people do take long
time-traces and the FFT<br>
makes it possible to compute Fourier transforms on those.<br>
</blockquote>
<div><br>
</div>
<div>In SciPy 1.1.0, <span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">windows</span>.slepian
will be deprecated and replaced by <span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">windows.dpss</span>
:</div>
<div><br>
</div>
<div><a
href="https://scipy.github.io/devdocs/generated/scipy.signal.windows.dpss.html"
target="_blank" moz-do-not-send="true">https://scipy.github.io/<wbr>devdocs/generated/scipy.<wbr>signal.windows.dpss.html</a></div>
<div><a href="https://github.com/scipy/scipy/pull/7802"
target="_blank" moz-do-not-send="true">https://github.com/scipy/<wbr>scipy/pull/7802</a><br>
</div>
<div><a href="https://github.com/scipy/scipy/issues/4354"
target="_blank" moz-do-not-send="true">https://github.com/scipy/<wbr>scipy/issues/4354</a><br>
</div>
<div><br>
</div>
<div>Does that do what you want?</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">I have working code for
this, which is based on the implementation<br>
suggested in [5] but is in pure Python.</blockquote>
<div><br>
</div>
<div>Aren't there copyright/license issues with using code
from Numerical Recipes?</div>
<div> <br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Once we have the full
set of Slepians available, from there we (or I)<br>
could also implement the multitaper spectral analysis
technique<br>
</blockquote>
<div><br>
</div>
<div>That would be useful!</div>
<div> <br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">So, what do you guys
think of my proposal? If you like it, please advise<br>
me on how to proceed as this is the first time I'm
planning to<br>
contribute. From what I took of the web page, I'll start
by downloading<br>
the repo - and then should I make a new branch? I'm also
happy to send<br>
some code through via email for your review first.</blockquote>
<div><br>
</div>
<div>Can you read through <span
style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><a
href="https://github.com/scipy/scipy/pull/7802"
target="_blank" moz-do-not-send="true">https://github.com/scipy/<wbr>scipy/pull/7802</a></span> and
comment if you see a problem with it, or it doesn't do all
that you would want it to do? </div>
<div><br>
</div>
<div>Also we were a little confused about how best to
normalize the amplitude of the functions. In your work,
do you use the L2 norm?</div>
<div><br>
</div>
</div>
</div>
</div>
<br>
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