[Scilab-users] CLR design component is not clear in scilab 6.0.2 x64 W10

[Federico Miyara]

Samuel,

In another e-mail that for some reason was not sent (and was completely 
deleted...) I mentioned this page 
https://en.wikipedia.org/wiki/List_of_mathematical_symbols and standard 
ISO 80000-2, which in its clause 9, item 2.9.5 says that symbol for 
multiplication is either · or ×, and that they can be omitted if no 
misunderstanding is possible, and presents two examples of omission, one 
with space, such as /a/ /b/, and one without space, such as /ab/ (I 
suppose this is when one has been already using /a/ and /b/ or they are 
immediately explained).

I like the space more, it is more general and the only situation where 
it would be ambiguous is between numbers, such as 1.234 58 (since the 
thousand separator is a short space according to the ISO-BIPM GUM), but 
between numbers × is customary.

Regards,

Federico



On 30/10/2019 18:43, Samuel Gougeon wrote:
> Le 30/10/2019 à 21:51, Federico Miyara a écrit :
>>
>> Dear all,
>>
>> I think a half-high (centered) dot "·" is a better (and more 
>> standard) multiplication sign, it does not take much space and it 
>> cannot be confused with the decimal separator ".", for instance
>>
>> 1 + Ts·s - A·s^2
>>
>> 1 + 2.·s - 0.27·s^2
>>
>> However, I think the decimal dot shouldn't be used in a block 
>> diagram, its only use is to indicate they are real numbers, but block 
>> diagrams never refer to integers so the decimal dot is somewhat pedantic.
>
> ?
> When a decimal number is integer, the dot is not displayed. With your 
> dot, it would give
> 1 + 2·s - 0.27·s^2
> So the confusion could be only with cases like 1 + 2.55.s
>
> I was told that in formulae, the most standard is to use space between 
> multiplied symbols.
> This is what looks the most widely used. Please see for example
> https://en.wikipedia.org/wiki/Autocorrelation or any other page using 
> a lot of maths.
>
> Output with \cdot :
>
> vs wider space
>
> or still wider:
>
>
>
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