Re: [Scilab-users] Test statistics with linregr function

[Eric Dubois]

Hello Samuel.

For the standard errors of the coefficients, they can be derived from the
results fo the regression.

You have to store these resulst in atlist, say myres as follows:
--> myres=ols([your input])

and then
--> stderr=myres('beta') ./ myres('tstat')

For the Z statistics, could you precise what you mean by that? (if ypu mean
the Student statistics, then they are already displayed on screen in the
colum t-statistics adn can be recovered as myres('tstat')

As for confidence intervals, it is a little bit more tedious but also
feasible:
--> scale=cdft("T",myres('nobs')-myres('nvar'),0.025,0.975); // from the
Student distribution takes the value acheiving the 0.05/2 lowest part of
tyhe distribution
--> conf=[myres('beta')+scale*stderr , myres('beta')-scale*stderr]
// build the 0.95 confidence interval from the coefficients and their
standard error ; note: instead of sclae you could use the -asymptotic-
value of 1.96

I will add these fetaures in a future Grocer version/.

Éric.

2014-07-24 23:56 GMT+02:00 Samuel Enibe :

> Thanks once more.
> I have been able to use the *ols* function, but there are still a few
> grey areas. It is not clear to me which of the output parameters to use in
> determining the following parameters of each regression coefficien, namely
>
> *"Standard  error",*
>
>
> *"Z", *
>
>
>
> *"95% confidence Interval" *
>
> I will appreciate any further insights.
>
> Samuel Ogbonna Enibe
>
>
> On Thu, Jul 24, 2014 at 9:42 PM, Eric Dubois 
> wrote:
>
>> Hello Samuel.
>>
>> The equivalent of function linreg in Grocer is function ols (much simpler
>> I hope than automatic). If you still have problems with ols, what are they?
>>
>> Éric.
>>
>>
>> 2014-07-24 17:35 GMT+02:00 Samuel Enibe :
>>
>>> Dear sir,
>>>
>>> I am using the *linregr* multiple regression  function to analyse some
>>> field data. I have obtained the multiple regression coefficients *b*
>>> built into the *stat* output variable. For each coefficient *b(i)*, I
>>> need to determine the standard error, Z-score, P-value and  95% confidence
>>> interval.
>>>
>>> How can I do this with *linregr* or any other suitable SCILAB function.
>>> I have found it a bit difficult using the *automatic* and similar
>>> functions built into the  *Grocer*  toolbox of Eric DuBois which could
>>> have been a way out.
>>>
>>> I will appreciate any help.
>>>
>>> Samuel Ogbonna Enibe
>>>
>>> 
>>>
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>>> users mailing list
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>>>
>>
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[Scilab-users] Scilab analoge displays

[der_Phil]

Dear Forum,

being in search for analogue displays GUI's for Scilab I didn't really found
something.

Maybe I didnt search correct, but maybe this is still something to be
implemented into Scilab.

So, based on a matlab code snipplet I created a small program, that uses a
background image and uses this as a tachometer display for velocity values.

The code can be found at: 

http://fileexchange.scilab.org/toolboxes/312000

I use Scialb 5.4.1 on a WIN-XP 32 bit machine.
The image handling commands are based on SIVP (or AIVP) and PID toolboxes.

Let me know what you think about.
Maybe this will help to create a small GUI at your own.

Best Regards,
Phil



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Re: [Scilab-users] Test statistics with linregr function

[Samuel Enibe]

Dear Eric,

Thank you very much for the detailed explanations.

I am very grateful.

God bless you.

Samuel Ogbonna Enibe

On Fri, Jul 25, 2014 at 9:08 AM, Eric Dubois 
wrote:

> Hello Samuel.
>
> For the standard errors of the coefficients, they can be derived from the
> results fo the regression.
>
> You have to store these resulst in atlist, say myres as follows:
> --> myres=ols([your input])
>
> and then
> --> stderr=myres('beta') ./ myres('tstat')
>
> For the Z statistics, could you precise what you mean by that? (if ypu
> mean the Student statistics, then they are already displayed on screen in
> the colum t-statistics adn can be recovered as myres('tstat')
>
> As for confidence intervals, it is a little bit more tedious but also
> feasible:
> --> scale=cdft("T",myres('nobs')-myres('nvar'),0.025,0.975); // from the
> Student distribution takes the value acheiving the 0.05/2 lowest part of
> tyhe distribution
> --> conf=[myres('beta')+scale*stderr , myres('beta')-scale*stderr]
> // build the 0.95 confidence interval from the coefficients and their
> standard error ; note: instead of sclae you could use the -asymptotic-
> value of 1.96
>
> I will add these fetaures in a future Grocer version/.
>
> Éric.
>
> 2014-07-24 23:56 GMT+02:00 Samuel Enibe :
>
> Thanks once more.
>> I have been able to use the *ols* function, but there are still a few
>> grey areas. It is not clear to me which of the output parameters to use in
>> determining the following parameters of each regression coefficien, namely
>>
>> *"Standard  error",*
>>
>>
>> *"Z", *
>>
>>
>>
>> *"95% confidence Interval" *
>>
>> I will appreciate any further insights.
>>
>> Samuel Ogbonna Enibe
>>
>>
>>  On Thu, Jul 24, 2014 at 9:42 PM, Eric Dubois 
>> wrote:
>>
>>> Hello Samuel.
>>>
>>> The equivalent of function linreg in Grocer is function ols (much
>>> simpler I hope than automatic). If you still have problems with ols, what
>>> are they?
>>>
>>> Éric.
>>>
>>>
>>> 2014-07-24 17:35 GMT+02:00 Samuel Enibe :
>>>
 Dear sir,

 I am using the *linregr* multiple regression  function to analyse some
 field data. I have obtained the multiple regression coefficients *b*
 built into the *stat* output variable. For each coefficient *b(i)*, I
 need to determine the standard error, Z-score, P-value and  95% confidence
 interval.

 How can I do this with *linregr* or any other suitable SCILAB
 function. I have found it a bit difficult using the *automatic* and
 similar functions built into the  *Grocer*  toolbox of Eric DuBois
 which could have been a way out.

 I will appreciate any help.

 Samuel Ogbonna Enibe

 

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 users@lists.scilab.org
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[Scilab-users] scilab does not start any more

[haasejos]

 
 

hello,
scilab 5.0.0 does not start any more (window 7 64bit). For errormessages see
"Bild_1.jpg" and "Bild_2.jpg". Even deinstallation - newinstallation does
not solve the problem. Scilab 5.4.1 works fine.
What can I do?
Thank you!
Josef
  



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Re: [Scilab-users] Scilab analoge displays

[A Khorshidi]

Hi Philipp; 

I've not tried out your code yet but it seems to be a solution to what I
currently wanna do. I agree that analogue displays are rare in Scilab and
moreover, there is the same tragedy for analogue inputs. Although we can use
slider-style uicontrol in linear cases, there is no option in rotary cases. 

So I'm sure you'll agree that the addition of a new uicontrol style is
definitely necessary (As I posted here:
http://mailinglists.scilab.org/Scilab-users-slider-style-uicontrol-in-a-rotary-fashio-tp4030957.html).

Regards, 
Mehran
_




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Re: [Scilab-users] Scilab analoge displays

[der_Phil]

Hi Mehran,

in fact I do agree. Knobs and displays like you showed would be really nice.

Greetings,
Philipp

2014-07-25 16:27 GMT+02:00 A Khorshidi [via Scilab / Xcos - Mailing
Lists Archives] :
>
> Hi Philipp;
>
> I've not tried out your code yet but it seems to be a solution to what I
> currently wanna do. I agree that analogue displays are rare in Scilab and
> moreover, there is the same tragedy for analogue inputs. Although we can use
> slider-style uicontrol in linear cases, there is no option in rotary cases.
>
> So I'm sure you'll agree that the addition of a new uicontrol style is
> definitely necessary (As I posted here:
> http://mailinglists.scilab.org/Scilab-users-slider-style-uicontrol-in-a-rotary-fashio-tp4030957.html).
>
> Regards,
> Mehran
> _
>
>
> 
> If you reply to this email, your message will be added to the discussion
> below:
> http://mailinglists.scilab.org/Scilab-analoge-displays-tp4030962p4030966.html
> To unsubscribe from Scilab analoge displays, click here.
> NAML



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Re: [Scilab-users] Scilab analoge displays

[Philipp Mühlmann]

I uploaded a new version of the tachometer display.

It does not require a background image anymore, so it's plain scilab code.

The code can be found here:

https://fileexchange.scilab.org/toolboxes/312000/2.0

The coding might be a little "from behind through the eyes" as a say
goes...I guess there is a far more elegant solution...maybe it would
be better to use polarplot() from the beginning...but so far it seems
to work.

Since the code deals with a figure() now, it should be possible to
integrate it into a GUI.

Comments and Reviews are appreaciated.
Greetings,
Philipp

2014-07-25 16:49 GMT+02:00 der_Phil :
> Hi Mehran,
>
> in fact I do agree. Knobs and displays like you showed would be really nice.
>
> Greetings,
> Philipp
>
> 2014-07-25 16:27 GMT+02:00 A Khorshidi [via Scilab / Xcos - Mailing
> Lists Archives] <[hidden email]>:
>
>>
>> Hi Philipp;
>>
>> I've not tried out your code yet but it seems to be a solution to what I
>> currently wanna do. I agree that analogue displays are rare in Scilab and
>> moreover, there is the same tragedy for analogue inputs. Although we can
>> use
>> slider-style uicontrol in linear cases, there is no option in rotary
>> cases.
>>
>> So I'm sure you'll agree that the addition of a new uicontrol style is
>> definitely necessary (As I posted here:
>>
>> http://mailinglists.scilab.org/Scilab-users-slider-style-uicontrol-in-a-rotary-fashio-tp4030957.html).
>>
>> Regards,
>> Mehran
>> _
>>
>>
>> 
>> If you reply to this email, your message will be added to the discussion
>> below:
>>
>> http://mailinglists.scilab.org/Scilab-analoge-displays-tp4030962p4030966.html
>> To unsubscribe from Scilab analoge displays, click here.
>> NAML
>
>
>
> --
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>
> 
> View this message in context: Re: Scilab analoge displays
>
> Sent from the Scilab users - Mailing Lists Archives mailing list archive at
> Nabble.com.
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