[Scilab-Dev] strings cannot be cut into several lines
Éric Dubois
grocer.toolbox at gmail.com
Sun Sep 9 11:21:01 CEST 2018
Thanks Antoine for your quick and precised answer.
I understand the point, but besides "ascending compatibility" (which as a
user I give -quite naturally- more weight than you as a developper), it
makes the writing of long strings rather heavy and I think that an
exception should have been made for strings. In fact, for long strings the
solution you mention (and I mentionned also in ly previous e-mail)
consisting in adding strings seems to mesomehow artificial, since it
amounts to build a variable by splitting it into several ones.
As an example of my point, take the Troll code of the macroeconomic model
"Opale", that has been recently realeased by the French Treasury (
https://www.tresor.economie.gouv.fr/Articles/2018/09/05/la-dg-tresor-met-a-la-disposition-du-public-les-codes-sources-des-modeles-mesange-opale-et-saphir).
Since Troll is proprietary and not Opensource software, I have undertaken
(and in fact managed) to translate it into Scilab (which involves many
blocks, sucha s a symbolic derivativefor instance.
If you take an excerpt of the code that adds some equations to an existing
model, it is written in Troll :
ADDEQ bottom
td_p3m_d7_ch : DEL(1: LOG(td_p3m_d7_ch)) = p3md7cst'c
+ p3md7balpos'c * balpos
+ p3md7balneg'c * balneg
+ p3md7juppos'c * juppos
+ p3md7jupneg'c * jupneg
+ p3md7filneg'c * filneg
+ p3md7indic1999q3'c* indic1999q3
+ p3md7rdbr0'c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH))
+ p3md7rdbr1'c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH))(-1)
+ p3md7tcho0'c * DEL(TCHO)
+ p3md7vs0'c * DEL(TEMPVS1)
+ mup3md7'c * (
LOG(td_p3m_d7_ch(-1)) - p3m_d7_ch_cale(-1)
- 1 * LOG(TD_B6_S143(-1)/TD_P3M_D5_CH(-1))
)
+ DEL(p3m_d7_ch_cale),
td_p3p_d7_ch : td_p3p_d7_ch = coefp3pd7_ch * td_p3g_d7_ch ,
td_p51s_dhfz7_ch : DEL(LOG(td_p51s_dhfz7_ch)) = -0.002801
+ 0.257006 * (DEL(LOG(td_p51s_dhfz7_ch(-2)))-DEL(p51s_dhfz7_ch_cale(-2)))
- 0.592343 * DEL(LOG(td_p51s_dhfz5_ch/TD_B1_BMNA5_CH))
+ 1.363988 * DEL(LOG(td_b1_bmna7_ch))
+ 0.002681 * DEL(TUC) // ça devrait être DEL(TUC)(-1)
=> à changer
- 0.093789 * (
LOG(td_p51s_dhfz7_ch(-1))- LOG(td_b1_bmna7_ch(-1)) -
( -1.854938 -0.018102 * COUT_REEL(-1) )
- p51s_dhfz7_ch_cale(-1) )
+ DEL(p51s_dhfz7_ch_cale),
In Scilab 5.5.2 it should be written:
ADDEQ('bottom','...
td_p3m_d7_ch : DEL(1: LOG(td_p3m_d7_ch)) = p3md7cst''c ...
+ p3md7balpos''c * balpos ...
+ p3md7balneg''c * balneg ...
+ p3md7juppos''c * juppos ...
+ p3md7jupneg''c * jupneg ...
+ p3md7filneg''c * filneg ...
+ p3md7indic1999q3''c* indic1999q3 ...
+ p3md7rdbr0''c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH)) ...
+ p3md7rdbr1''c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH))(-1)
...
+ p3md7tcho0''c * DEL(TCHO) ...
+ p3md7vs0''c * DEL(TEMPVS1) ...
+ mup3md7''c * ( ...
LOG(td_p3m_d7_ch(-1)) - p3m_d7_ch_cale(-1) ...
- 1 * LOG(TD_B6_S143(-1)/TD_P3M_D5_CH(-1)) ...
) ...
+ DEL(p3m_d7_ch_cale), ...
...
td_p3p_d7_ch : td_p3p_d7_ch = coefp3pd7_ch * td_p3g_d7_ch , ...
...
td_p51s_dhfz7_ch : DEL(LOG(td_p51s_dhfz7_ch)) = -0.002801 ...
+ 0.257006 * (DEL(LOG(td_p51s_dhfz7_ch(-2)))-DEL(p51s_dhfz7_ch_cale(-2)))
...
- 0.592343 * DEL(LOG(td_p51s_dhfz5_ch/TD_B1_BMNA5_CH))
...
+ 1.363988 * DEL(LOG(td_b1_bmna7_ch)) ...
+ 0.002681 * DEL(TUC) ...
- 0.093789 * ( ...
LOG(td_p51s_dhfz7_ch(-1))- LOG(td_b1_bmna7_ch(-1)) - ...
( -1.854938 -0.018102 * COUT_REEL(-1) ) ...
- p51s_dhfz7_ch_cale(-1) ) ...
+ DEL(p51s_dhfz7_ch_cale)')
And in Scilab 6.0.1:
ADDEQ('bottom','...
td_p3m_d7_ch : DEL(1: LOG(td_p3m_d7_ch)) = p3md7cst''c'+ ...
'+ p3md7balpos''c * balpos'+ ...
'+ p3md7balneg''c * balneg'+ ...
'+ p3md7juppos''c * juppos'+ ...
'+ p3md7jupneg''c * jupneg'+ ...
'+ p3md7filneg''c * filneg'+ ...
'+ p3md7indic1999q3''c* indic1999q3 ...
' + p3md7rdbr0''c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH))'+
...
'+ p3md7rdbr1''c * DEL(LOG(TD_B6_S143/TD_P3M_D5_CH))(-1)'+
...
'+ p3md7tcho0''c * DEL(TCHO) '+ ...
'+ p3md7vs0''c * DEL(TEMPVS1)'+ ...
'+ mup3md7''c * ('+ ...
'LOG(td_p3m_d7_ch(-1)) - p3m_d7_ch_cale(-1)'+ ...
'- 1 * LOG(TD_B6_S143(-1)/TD_P3M_D5_CH(-1)) '+...
')'+ ...
'+ DEL(p3m_d7_ch_cale),'+ ...
+...
'td_p3p_d7_ch : td_p3p_d7_ch = coefp3pd7_ch * td_p3g_d7_ch ,'+ ...
+ ...
'td_p51s_dhfz7_ch : DEL(LOG(td_p51s_dhfz7_ch)) = -0.002801 '+ ...
'+ 0.257006 * (DEL(LOG(td_p51s_dhfz7_ch(-2)))-DEL(p51s_dhfz7_ch_cale(-2)))'+
...
' - 0.592343 * DEL(LOG(td_p51s_dhfz5_ch/TD_B1_BMNA5_CH))'+
...
'+ 1.363988 * DEL(LOG(td_b1_bmna7_ch))'+ ...
'+ 0.002681 * DEL(TUC)'+ ...
'- 0.093789 * ('+ ...
'+LOG(td_p51s_dhfz7_ch(-1))- LOG(td_b1_bmna7_ch(-1)) - '+...
'( -1.854938 -0.018102 * COUT_REEL(-1) ) '+...
'- p51s_dhfz7_ch_cale(-1) ) '+...
'+ DEL(p51s_dhfz7_ch_cale)')
For an economist point of view the last writing makes it much more
difficult the understanding of the structure of the equations and I fear
that it could make external users reluctant to use my code...
Regards,
Éric
Le sam. 8 sept. 2018 à 10:41, Éric Dubois <grocer.toolbox at gmail.com> a
écrit :
> Hello
>
> Can someone explain me why in Scilab 6, you cannot wirte a string on
> several lines each line ending by "..."?
>
> When you have a very long string, you have 2 choices that are not
> appealing:
> - write this string on a line, which is not very readable;
> - define several strings covering different components of the string and
> then add them to build your string, which is a time consuming.
>
> This change makes my productivity when programming in Scilab decline and I
> do not see teh drawbacks that the old working entailed.
>
> Thansk for your answer.
>
> Regards
>
> Éric
>
>
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