[Scilab-users] printf bug?
Stefan Du Rietz
sdr at durietz.se
Mon Oct 20 19:49:07 CEST 2014
But why the difference between msprintf() and string()?
Stefan
On 2014-10-20 18:19, Stéphane Mottelet wrote:
> Hello,
>
> I think that the decimal separator is controlled by the LC_NUMERIC or
> the LANG environment variable. With my local install
> (LANG=fr_FR.UTF-8) I get
>
> -->msprintf("%0.1f",1.2345)
> ans =
>
> 1.2
>
> S.
>
> Le 20/10/2014 17:48, Stefan Du Rietz a écrit :
>> Hello,
>> look here:
>>
>> -->x = 1.2345
>> x =
>> 1.2345
>> -->msprintf("%0.1f", x)
>> ans =
>> 1,2
>> -->string(0.1 * floor(10 * x))
>> ans =
>> 1.2
>>
>> This could cause disastrous results, e.g. when written to files ...
>>
>> Regards
>> Stefan
>>
>>
>> On 2014-08-02 22:35, Stefan Du Rietz wrote:
>>> With "Scilab" here, I mean Scilab 5.5.0.
>>>
>>> On 2014-08-02 22:30, Stefan Du Rietz wrote:
>>>> Thank you, Leon,
>>>> it confirms that Scilab 5.4.1 handles it correctly.
>>>>
>>>> But when I have LC_NUMERIC="en_DK.utf8" which means decimal comma,
>>>> see
>>>> below, Scilab is in error:
>>>> -->msprintf("%0.2f", %pi)
>>>> ans =
>>>> 3,14
>>>> -->msprintf("%0.2f", 3.1416)
>>>> ans =
>>>> 3,14
>>>>
>>>> Compare the correct handling in Python:
>>>> >>> "Pi with two decimals is %0.2f" % 3.1416
>>>> 'Pi with two decimals is 3.14'
>>>>
>>>> Can any of the developers comment on this, or shall I report a bug?
>>>>
>>>> Regards
>>>> Stefan
>>>>
>>>> stefan at Asus1:~$ uname -a
>>>> Linux Asus1 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:12 UTC
>>>> 2014 i686 i686 i686 GNU/Linux
>>>> stefan at Asus1:~$ locale
>>>> LANG=en_GB.UTF-8
>>>> LANGUAGE=en_GB:en
>>>> LC_CTYPE="en_DK.utf8"
>>>> LC_NUMERIC="en_DK.utf8"
>>>> LC_TIME="en_DK.utf8"
>>>> LC_COLLATE="en_DK.utf8"
>>>> LC_MONETARY="en_DK.utf8"
>>>> LC_MESSAGES="en_DK.utf8"
>>>> LC_PAPER="en_DK.utf8"
>>>> LC_NAME="en_DK.utf8"
>>>> LC_ADDRESS="en_DK.utf8"
>>>> LC_TELEPHONE="en_DK.utf8"
>>>> LC_MEASUREMENT="en_DK.utf8"
>>>> LC_IDENTIFICATION="en_DK.utf8"
>>>> LC_ALL=en_DK.utf8
>>>>
>>>>
>>>> On 2014-07-30 07:25, Leon Bevc wrote:
>>>>> Here is output from openSuse 13.1 and Scilab 5.4.1:
>>>>> ---------------------------
>>>>> lebevc at linux-xkf0:~> uname -a
>>>>> Linux linux-xkf0.site 3.15.3-1.g42bf625-desktop #1 SMP PREEMPT
>>>>> Wed Jul 2 09:23:08 UTC 2014 (42bf625) x86_64 x86_64 x86_64 GNU/Linux
>>>>> ---------------------------
>>>>> lebevc at linux-xkf0:~> locale
>>>>> LANG=sl_SI.UTF-8
>>>>> LC_CTYPE="sl_SI.UTF-8"
>>>>> LC_NUMERIC="sl_SI.UTF-8"
>>>>> LC_TIME="sl_SI.UTF-8"
>>>>> LC_COLLATE="sl_SI.UTF-8"
>>>>> LC_MONETARY="sl_SI.UTF-8"
>>>>> LC_MESSAGES="sl_SI.UTF-8"
>>>>> LC_PAPER="sl_SI.UTF-8"
>>>>> LC_NAME="sl_SI.UTF-8"
>>>>> LC_ADDRESS="sl_SI.UTF-8"
>>>>> LC_TELEPHONE="sl_SI.UTF-8"
>>>>> LC_MEASUREMENT="sl_SI.UTF-8"
>>>>> LC_IDENTIFICATION="sl_SI.UTF-8"
>>>>> LC_ALL=
>>>>> ---------------------------
>>>>> lebevc at linux-xkf0:~> printf "%0.2f\n" 3.1416
>>>>> bash: printf: 3.1416: invalid number
>>>>> 0,00
>>>>> lebevc at linux-xkf0:~> printf "%0.2f\n" 3,1416
>>>>> 3,14
>>>>>
>>>>> //-----Scilab---------------------
>>>>>
>>>>> -->ver
>>>>> Scilab Version: 5.4.1.1364497457
>>>>>
>>>>> -->x = 0.12345
>>>>> x =
>>>>> 0.12345
>>>>>
>>>>> -->xstr = msprintf("%0.2f", x)
>>>>> xstr =
>>>>> 0.12
>>>>>
>>>>>
>>>>> 2014-07-29 22:41 GMT+02:00 Stefan Du Rietz <sdr at durietz.se
>>>>> <mailto:sdr at durietz.se>>:
>>>>>
>>>>> Leon, Can you please try it with Scilab 5.4.1 under openSUSE?
>>>>> And
>>>>> can you show its Bash output from
>>>>> $ locale
>>>>>
>>>>> When I was running Scilab 5.4.1 under Xubuntu 12.04, printf
>>>>> worked
>>>>> OK, but also in Bash. So the question is: Why do you now get
>>>>> different results in Scilab and Bash?
>>>>>
>>>>> And *the important point*: Why should a mathematics program
>>>>> handle
>>>>> inputs differently from outputs?
>>>>>
>>>>> If one should handle decimal separators differently depending on
>>>>> the local language, it should be done consistently (as in Bash,
>>>>> even if I don't like it)!
>>>>>
>>>>> One could of course have special functions or arguments to
>>>>> present
>>>>> numbers in specific local formats.
>>>>>
>>>>> Stefan
>>>>>
>>>>>
>>>>>
>>>>> On 2014-07-29 19:41, Leon Bevc wrote:
>>>>>
>>>>> Strange...
>>>>>
>>>>> In this case I got the same result as you on Xubuntu and
>>>>> openSUSE:
>>>>>
>>>>> [ xUbuntu 14.04.1 - 32bit / Scilab 5.5.0 /
>>>>> LANG=sl_SI.UTF-8 ]
>>>>> lebevc at book-PC:~$ printf "%0.2f\n" 3.1416
>>>>> bash: printf: 3.1416: neveljavno število
>>>>> 0,00
>>>>> lebevc at book-PC:~$ printf "%0.2f\n" 3,1416
>>>>> 3,14
>>>>>
>>>>>
>>>>> ------------------------------__------------------------------__----------
>>>>>
>>>>>
>>>>>
>>>>> [ openSUSE 13.1-64bit ; Scilab 5.4.1]
>>>>> lebevc at linux-xkf0:~> printf "%0.2f\n" 3.1416
>>>>> bash: printf: 3.1416: invalid number
>>>>> 0,00
>>>>> lebevc at linux-xkf0:~> printf "%0.2f\n" 3,1416
>>>>> 3,14
>>>>>
>>>>> -->x = 0.6231166;
>>>>> -->xstr = msprintf("%0.2f", x)
>>>>> xstr =
>>>>> 0.62
>>>>>
>>>>>
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