<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<br>
Dear Samuel,<br>
<br>
<blockquote type="cite"
cite="mid:8540d1ca-2a2c-c652-86e9-141d41229624@free.fr">
<blockquote type="cite"
cite="mid:0948801f-e39a-9f59-c4ee-a869efc8c4bc@fceia.unr.edu.ar"><font
face="Courier New">I wonder why this function doesn't follow
the tacit rule that trigonometric functions are notated with
three-letter names </font></blockquote>
<br>
There is no such rule, even tacit. Shortness is much weaker than
clarity, and to me cot is really unclear (and too short).<br>
</blockquote>
<br>
There is, indeed, a rule. It is included in ISO Standard 8000 Part 2
(Mathematical signs and symbols to be used in natural sciences and
technology), clause 13, and states that the symbol for "cotangent of
x" is cot <i>x</i>, and that ctg should not be used (it says
nothing about cotg, I acknowledge, but preference is clearly for
cot).<br>
<br>
I don't see why cot would be unclear.<br>
<br>
<blockquote type="cite"
cite="mid:8540d1ca-2a2c-c652-86e9-141d41229624@free.fr"> The
shorter are reserved keywords, the more probable are conflicts
with custom current variables. So this "g" is welcome.</blockquote>
<br>
The same would apply to sin or cos or to any of the short or long
function names. I think the basic knowledge of common symbols is the
responsibility of the user. If a user decided to use cot as a custom
variable and then wants to use the same symbol as the trigonometric
function (without clearing first the variable) there is a
programming style problem. <br>
<br>
The only problem I see with cot would be a backward compatibility
one, which could be handled by keeping cotg during some versions
and, if there is any difference between the Matlab cot and the
Scilab cot/cotg, introducing a mtlb_cot function as happens with
other functions used in the matlab to scilab conveersion tool. <br>
<br>
Regards,<br>
<br>
Federico Miyara<br>
<br>
<br>
<br>
<blockquote type="cite"
cite="mid:8540d1ca-2a2c-c652-86e9-141d41229624@free.fr">
</blockquote>
<div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<br /><br />
<hr style='border:none; color:#909090; background-color:#B0B0B0; height: 1px; width: 99%;' />
<table style='border-collapse:collapse;border:none;'>
<tr>
<td style='border:none;padding:0px 15px 0px 8px'>
<a href="https://www.avast.com/antivirus">
<img border=0 src="http://static.avast.com/emails/avast-mail-stamp.png" alt="Avast logo" />
</a>
</td>
<td>
<p style='color:#3d4d5a; font-family:"Calibri","Verdana","Arial","Helvetica"; font-size:12pt;'>
El software de antivirus Avast ha analizado este correo electrónico en busca de virus.
<br><a href="https://www.avast.com/antivirus">www.avast.com</a>
</p>
</td>
</tr>
</table>
<br />
<a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"> </a></div></body>
</html>