Re: [Scilab-users] Get back the name of a function given as argument

[Pierre Vuillemin]

Hi Samuel,

Thank you for the answer. I have finally came up with this routine :

function funName = sopi_retrieveFunName(f)
varList = who_user(%f);
for i = 2:size(varList,1) // "f" is the local copy of the function 
and is the first one in the varList, it must be discarded

varName = varList(i);
execstr("var = "+varName);
if var == f then
funName = varName;
break;
end
end
endfunction

It retrieves the name of the function given as argument by comparing it 
to the user's variables. It (very) far from being elegant, but it seems 
to work.


Will there be a better way to achieve that with Scilab 6 ?

Pierre


Le 12.10.2015 21:02, Samuel Gougeon a écrit :

Hi Pierre,

Le 12/10/2015 16:46, Pierre Vuillemin a écrit :

Hi all,

I am building some optimisation tools, and in this context, I was 
wondering if it was possible to get back the name of a function given 
as argument of another function.


More specifically, consider the function 'fun' defined as

deff('[f,g] = fun(x)','f = x^2;g = 2*x');

and an optimisation routine "minimize" which first argument is a 
function.


Is there a way to get back the name of the function "fun" when calling 
"minimize(fun)" ?


I am afraid that, with 5.5.2,  you have to use something like
minimize("thefun") instead, with

function argout = minimize(fun,...)
execstr("fun="+fun);
   ...
endfunction

Samuel

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Re: [Scilab-users] Get back the name of a function given as argument

[Pierre Vuillemin]

My bad, I've just realised that

- this routine will actually give the name of the last copy of the 
function (in case of multiple imbricated function calls),


- besides, a simpler solution consists in using the name of the local 
copy of the function.


deff('y = fun(x)','y = x^2');
deff('y = f(x)','y = x');
deff('minimize(f)','disp(evstr(''f(2)''))');

minimize(f)   // displays 2
minimize(fun) // displays 4


Le 13.10.2015 08:44, Pierre Vuillemin a écrit :

Hi Samuel,

Thank you for the answer. I have finally came up with this routine :

function funName = sopi_retrieveFunName(f)
varList = who_user(%f);
for i = 2:size(varList,1) // "f" is the local copy of the function
and is the first one in the varList, it must be discarded
varName = varList(i);
execstr("var = "+varName);
if var == f then
funName = varName;
break;
end
end
endfunction

It retrieves the name of the function given as argument by comparing
it to the user's variables. It (very) far from being elegant, but it
seems to work.

Will there be a better way to achieve that with Scilab 6 ?

Pierre


Le 12.10.2015 21:02, Samuel Gougeon a écrit :

Hi Pierre,

Le 12/10/2015 16:46, Pierre Vuillemin a écrit :

Hi all,

I am building some optimisation tools, and in this context, I was 
wondering if it was possible to get back the name of a function given 
as argument of another function.


More specifically, consider the function 'fun' defined as

deff('[f,g] = fun(x)','f = x^2;g = 2*x');

and an optimisation routine "minimize" which first argument is a 
function.


Is there a way to get back the name of the function "fun" when 
calling "minimize(fun)" ?


I am afraid that, with 5.5.2,  you have to use something like
minimize("thefun") instead, with

function argout = minimize(fun,...)
execstr("fun="+fun);
   ...
endfunction

Samuel

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Re: [Scilab-users] read format

[grivet]

Your suggestion does not work for me. Here is what I get:
-->M = csvRead('dataN.txt', ';', "double");
 -->M(1:10,:)
 ans  =
 Nan5.491.
Nan5.491.
Nan5.481.
Nan5.481.
Nan5.481.
which seems to check with the help for csvRead:

When the input argument "conversion" is equal to "double", the 
non-numeric fields within the .csv (e.g. strings) are converted into NaN.


Thank you for your time and help.
JP Grivet

Hello,

Well in fact the `evstr` call is not needed if you parse the csv and
interpreting directly the values as "double" using :

M = csvRead('/tmp/sample.csv', ';', "double");
values = M(:,2);

Regards,

--
Clément

Le lundi 12 octobre 2015 à 18:00 +0200, grivet a écrit :

Thank you Samuel, this works like a charm, even though the last step
(evstr) takes a couple of minutes (8 lines!).
For a completely different solution: read the file into emacs, define
a
rectangle of width 20 chars and height the whole file, delete this
rectangle, search for ".1" and erase every occurence of this string.
Thanks to everybody,
JP Grivet


Le 12/10/2015 14:26, grivet a écrit :

Hello,
I have a data file of about 80k lines. A typical line looks like
this:
 01/03/2015 00:01:00;5.49;1
(date time; value;parameter). I am only interested in the field
"value", which can be 3 or 4
characters wide (i.e. 5.49 or 5.4).
How can I extract the desired data from this file ?

.
Likely with
M  = csvRead(TheFileName, ";", ".", "string");
values = evstr(M(:,2));

Samuel Gougeon


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Re: [Scilab-users] read format

[CHEZE David 227480]

But you said you were just interested in the last two numeric values : with 
double conversion into csvRead call it's the fastest way to get the relevant 
information and process it further. Would you need to get the timestamps data, 
you may call csvRead with "string" conversion and process the first column of 
the matrix of string to retrieve numeric value fields. 

Cheers,

David Chèze  

-Message d'origine-
De : users [mailto:users-boun...@lists.scilab.org] De la part de grivet
Envoyé : mardi 13 octobre 2015 12:09
À : Clément David ; Users mailing list 
for Scilab 
Objet : Re: [Scilab-users] read format

Your suggestion does not work for me. Here is what I get:
-->M = csvRead('dataN.txt', ';', "double");
  -->M(1:10,:)
  ans  =
  Nan5.491.
 Nan5.491.
 Nan5.481.
 Nan5.481.
 Nan5.481.
which seems to check with the help for csvRead:

When the input argument "conversion" is equal to "double", the non-numeric 
fields within the .csv (e.g. strings) are converted into NaN.

Thank you for your time and help.
JP Grivet
> Hello,
>
> Well in fact the `evstr` call is not needed if you parse the csv and 
> interpreting directly the values as "double" using :
>
> M = csvRead('/tmp/sample.csv', ';', "double"); values = M(:,2);
>
> Regards,
>
> --
> Clément
>
> Le lundi 12 octobre 2015 à 18:00 +0200, grivet a écrit :
>> Thank you Samuel, this works like a charm, even though the last step
>> (evstr) takes a couple of minutes (8 lines!).
>> For a completely different solution: read the file into emacs, define 
>> a rectangle of width 20 chars and height the whole file, delete this 
>> rectangle, search for ".1" and erase every occurence of this string.
>> Thanks to everybody,
>> JP Grivet
>>
>>> Le 12/10/2015 14:26, grivet a écrit :
 Hello,
 I have a data file of about 80k lines. A typical line looks like
 this:
  01/03/2015 00:01:00;5.49;1 (date time; value;parameter). I 
 am only interested in the field "value", which can be 3 or 4 
 characters wide (i.e. 5.49 or 5.4).
 How can I extract the desired data from this file ?
>>> .
>>> Likely with
>>> M  = csvRead(TheFileName, ";", ".", "string"); values = 
>>> evstr(M(:,2));
>>>
>>> Samuel Gougeon
>>>
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Re: [Scilab-users] read format

[sgougeon]

Hello,

- Mail original -
>De: "CHEZE David 227480" 
>
>.../... Would you need to get the timestamps data, you may call csvRead with 
>"string" conversion and process the first column of the matrix of string to 
>retrieve numeric value fields. 

For this part, using mfscanf() as suggested by Serge will be more 
straightforward, instead of csvRead().

Samuel
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Re: [Scilab-users] read format

[Serge Steer]

It is possible to achieve what you want using the following instruction.
It is a little tricky, may be a C format expert can do it in a more
simple way.
u=mopen("",'r')
x=mfscanf(-1,u,"%*s %*2s%*[:]%*2s%*[:]%*2s%*[;]%g%*s");
mclose(u)

Serge Steer
Le 13/10/2015 16:19, sgoug...@free.fr a écrit :
> Hello,
>
> - Mail original -
>> De: "CHEZE David 227480" 
>>
>> .../... Would you need to get the timestamps data, you may call csvRead with 
>> "string" conversion and process the first column of the matrix of string to 
>> retrieve numeric value fields. 
> For this part, using mfscanf() as suggested by Serge will be more 
> straightforward, instead of csvRead().
>
> Samuel
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