Re: [Scilab-users] Optimization question
Dear Márton, I am using these functions to identify the points A and B that minimizes (or sometimes maximizes) this problem. Hence, I thought the optim could be the best solution to do this, since I must explore the search space. However, as said previously, using the intervals [0 1000] and [1 2000] I always get the same results. Please, do you have any suggestions to help me? Thank you so much for your attention! Best regards, Eduardo. -- View this message in context: http://mailinglists.scilab.org/Optimization-question-tp4031028p4031042.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] Scilab
Good Afternoon ladies and gentlemen My name is Gcinumuzi Ngwenya from South Africa. I am doing my BTech in Chemical Engineering and right now we have been introduced to Scilab but I am really struggling at the moment. Can you guys please help me with this two questions? 1. I have been plotting a transfer function graph on scilab and I see that on the x-axis it starts at 1 and end up on the value which I entered for final integration time, what informs scilab or the graph to start at 1, or what is the reason for it to start at 1? I got this graph when I was doing an example for the beginners on scilab website 2. what is meant by buffer size on the simulation/setup menu ? 3. is there a document that can explain to me the function of each palette on xcos? Thanking you in advance for your assistance Best Regards Gcinumuzi ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] Plot Error 21
Hi, I have previously used the function plot and it worked well. But, every time i use it now it outputs error 21. --x = [-5:5] x = - 5. - 4. - 3. - 2. - 1.0.1.2.3.4.5. --plot(x) !--error 21 Invalid index. at line 14 of function %h_e called by : at line 15 of function _update_shaded_plots called by : at line 91 of function _compute_data_bounds called by : at line 327 of function _mainPlot called by : at line 28 of function plot called by : plot(x) I am a windows 7 user. Please help me fix this. Thanks a lot, Tom -- View this message in context: http://mailinglists.scilab.org/Plot-Error-21-tp4031051.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] A question about plotting
Hello, When you type ' plot(X,Y) ', Scilab links together the consecutive [X(i),Y(i)] pairs. In your example, X(40)~6.28 and X(41)=0. So [X(40), Y(40)] is connected to [X(41), Y(41)], and the additional line represents that simple connection. ' plot(x,y1,x,y2); ' considers [x, y1] and [x, y2] as two distinct curves, so they are not linked together. Hope this helps, Regards, Paul On 08/18/2014 04:15 AM, ?? wrote: Hi , All: I have a question about plotting. I want to plot 2 lines in a graphic , so I type the command as below: --x=linspace(0,2*%pi,40); --y1=sin(x) --y2=cos(x); --X=[x,x]; --Y=[y1,y2]; Then , I type the plot command : --plot(x,y1,x,y2); The result is shown as below: Graphic window number 0 (2).bmp But when I type a command as below: --plot(X,Y); The result is : Graphic window number 0.bmp It has an additional line. Why will this line appear? Thanks for your reply. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users -- Paul BIGNIER Development engineer --- Scilab Enterprises 143bis rue Yves Le Coz - 78000 Versailles, France Phone: +33.1.80.77.04.69 http://www.scilab-enterprises.com ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Plot error
Hello, Le 17/08/2014 05:59, Einstom Engay a écrit : Hi, I have previously used the function plot and it worked well. But, every time i used it now it outputs the error 21. --x = [-5:5] x = - 5. - 4. - 3. - 2. - 1.0.1.2.3.4.5. --plot(x) !--error 21 Invalid index. at line 14 of function %h_e called by : at line 15 of function _update_shaded_plots called by : at line 91 of function _compute_data_bounds called by : at line 327 of function _mainPlot called by : at line 28 of function plot called by : plot(x) It works for me, also with Windows7. You might do: clear plot and then try again. Samuel ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Use of automatic function without one or more specification tests
Hello Samuel
I don not know what you mean by the function *automatic *runs partially,
but anyway, you can choose your specification tests with the option
'test=' as shown in example 2 of the help file for automatic.
If you want to use only the Doornik-Hansen normality test, then run (shown
with the example of the help file):
-- global GROCERDIR
-- load(GROCERDIR+'/data/bdhenderic.dat') ;
--
results=automatic('delts(lm1-lp)','lagts(lm1-lp-ly)','delts(lp)','rnet','delts(lagts(lm1-lp))',
'delts(lagts(2,lm1-lp))','delts(lagts(3,lm1-lp))','delts(lagts(4,lm1-lp))',...
'delts(ly)','delts(lagts(1,ly))',
'delts(lagts(2,ly))','delts(lagts(3,ly))','delts(lagts(4,ly))',...
'delts(delts(lp))','delts(delts(lagts(1,lp)))','delts(delts(lagts(2,lp)))','delts(delts(lagts(3,lp)))','delts(delts(lagts(4,lp)))',...
'delts(rnet)','delts(lagts(1,rnet))','delts(lagts(2,rnet))','delts(lagts(3,rnet))','delts(lagts(4,rnet))','const',...
'test=doornhans')
Alternativley if you want to obtain the display specification test, but
without them constarining the estimation, tou can impose a 0 p-value for
these tests with option 'eta=0':
--
results=automatic('delts(lm1-lp)','lagts(lm1-lp-ly)','delts(lp)','rnet','delts(lagts(lm1-lp))',
'delts(lagts(2,lm1-lp))','delts(lagts(3,lm1-lp))','delts(lagts(4,lm1-lp))',...
'delts(ly)','delts(lagts(1,ly))',
'delts(lagts(2,ly))','delts(lagts(3,ly))','delts(lagts(4,ly))',...
'delts(delts(lp))','delts(delts(lagts(1,lp)))','delts(delts(lagts(2,lp)))','delts(delts(lagts(3,lp)))','delts(delts(lagts(4,lp)))',...
'delts(rnet)','delts(lagts(1,rnet))','delts(lagts(2,rnet))','delts(lagts(3,rnet))','delts(lagts(4,rnet))','const',...
'eta=0')
Éric.
2014-08-18 0:01 GMT+02:00 Samuel Enibe samuel.en...@unn.edu.ng:
I would like to use the *automatic* function in the Grocer SCILAB package
to eliminate some non significant variables in a linear regression problem.
The function *ols* runs successfully on the data. In contrast, the
function *automatic* runs partially, suggesting that it should be run
without the specification tests. Is there any way to eliminate one or more
of the specification tests?
The user manual is not clear on this.
Your suggestions will be highly appropriated.
Samuel Enibe
University of Nigeria, Nsukka
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Re: [Scilab-users] A question about plotting
Hello, Your same questions posted on 2014-08-02 were answered two days latter, here: http://mailinglists.scilab.org/Scilab-users-A-question-about-plotting-tp4031000p4031001.html Samuel Le 18/08/2014 04:15, ?? a écrit : Hi , All: I have a question about plotting. I want to plot 2 lines in a graphic , so I type the command as below: --x=linspace(0,2*%pi,40); --y1=sin(x) --y2=cos(x); --X=[x,x]; --Y=[y1,y2]; Then , I type the plot command : --plot(x,y1,x,y2); The result is shown as below: Graphic window number 0 (2).bmp But when I type a command as below: --plot(X,Y); The result is : Graphic window number 0.bmp It has an additional line. Why will this line appear? Thanks for your reply. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
