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<font face="Courier New">Thanks, Samuel.<br>
<br>
This certainly clarifies how [] behaves. But is there a rationale
for sum([])==0 and yet cumsum([])==[]?<br>
<br>
By the way, it would be useful to include cumsum and cumprod among
the examples, or at least ensure the respective help pages include
that information.<br>
<br>
Regards, <br>
<br>
Federico <br>
</font><br>
<div class="moz-cite-prefix">On 09/02/2020 00:40, Samuel Gougeon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5e8a7818-e133-d0c2-03b4-99fe1e6ebadb@free.fr">
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<div class="moz-cite-prefix">Hello federico,</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">The empty page is improved in 6.1.0.
Please have a look to</div>
<div class="moz-cite-prefix"><a class="moz-txt-link-freetext"
href="http://bugzilla.scilab.org/15431" moz-do-not-send="true">http://bugzilla.scilab.org/15431</a></div>
<div class="moz-cite-prefix"><a class="moz-txt-link-freetext"
href="http://bugzilla.scilab.org/attachment.cgi?id=4929"
moz-do-not-send="true">http://bugzilla.scilab.org/attachment.cgi?id=4929</a></div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Thanks<br>
Samuel<br>
<br>
</div>
<div class="moz-cite-prefix">Le 09/02/2020 à 04:27, Federico
Miyara a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:5f969cca-98fd-4f82-2cf0-eb451e2820b9@fceia.unr.edu.ar">
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<font face="Courier New"><br>
Dear all,<br>
<br>
I note that sum([]) yields 0 instead of []. This is somewhat
contradictory with the documented behavior that [] + n yields
[] regardless of the type of n<br>
<br>
I allso find that prod([]) yields 1. This is even stranger.
The common feature is that both are the respective neutral
element of the operations.<br>
<br>
Interestingly, cumsum and cumprod applied to [] yield the
expected result, []<br>
<br>
</font><font face="Courier New">Besides, type([]) is 1
(constant). Somehow it is asuming an empty matrix is by
default a container for constants, even in csses such as the
following:<br>
<br>
a = %s<br>
b = a(1:$-1) <br>
<br>
where b is an empty sub-vector of a polynomial vector.<br>
<br>
None of these behaviors seem to be documented. If intentional,
they should be documented.<br>
<br>
Regards,<br>
<br>
Federico Miyara<br>
</font> <br>
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