Thread Subject:

Programming question

Dear all,

I need some help on the following issue:

Say I have 10 LLFs variables such that LLF1=3.3, LLF2=4.3,...,LLF10=5.4 and I need to estimate 10 different AIC and BIC tests such that
[AIC1,BIC1]=(LLF1,1000,4);
[AIC2,BIC2]=(LLF2,1000,4);
...
[AIC10,BIC10]=(LLF10,1000,4);

I need to do this with a for loop but I can't figure out how to tell matlab to create the output variables AICi and BICi variables and use the LLFi variable as inputs,
I though that I should do something like:

for n=1:10
[AIC{'n'},BIC{'n'}]=(LLF{'n'},1000,4);
end

but it doesn't work.

Thank you for your help!

"Chris" <AzizC0rn@bluestring.com> writes:

>Dear all,

>I need some help
use cells if you can, or type
   help eval
and look at the example

tpl@eng.cam.ac.uk (Tim Love) wrote in message <hj9t1u$584$1@gemini.csx.cam.ac.uk>...
> "Chris" <AzizC0rn@bluestring.com> writes:
>
> >Dear all,
>
> >I need some help
> use cells if you can, or type
> help eval
> and look at the example
I did the following with nesting an eval into another eval,
for n=1:2
D={'LLF1';'LLF2';'LLF3';'LLF4';'LLF5';'LLF6';'LLF7';'LLF8';'LLF9';'LLF10';}
eval(['AIC' num2str(n) '=aicbic(eval(D{n}),1000,2)'])
end

however, I do not know how to estimate the BICi variable.

Additionally, writing all these LLFs into the D matrix seems to be bad coding. I would be grateful If you have any suggestions on coding this in a clearer manner...

On Jan 21, 10:19 am, "Chris" <AzizC...@bluestring.com> wrote:
> t...@eng.cam.ac.uk (Tim Love) wrote in message <hj9t1u$58...@gemini.csx.cam.ac.uk>...
> > "Chris" <AzizC...@bluestring.com> writes:
>
> > >Dear all,
>
> > >I need some help
> > use cells if you can, or type
> >    help eval
> > and look at the example
>
> I did the following with nesting an eval into another eval,
> for n=1:2
> D={'LLF1';'LLF2';'LLF3';'LLF4';'LLF5';'LLF6';'LLF7';'LLF8';'LLF9';'LLF10';}
> eval(['AIC' num2str(n) '=aicbic(eval(D{n}),1000,2)'])
> end
>
> however, I do not know how to estimate the BICi variable.
>
> Additionally, writing all these LLFs into the D matrix seems to be bad coding. I would be grateful If you have any suggestions on coding this in a clearer manner...

Use a cell array or structure rather than creating multiple variables.
See MATLAB FAQ 6.4:
http://matlabwiki.mathworks.com/MATLAB_FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

-Nathan

"Chris" <AzizC0rn@bluestring.com> wrote in message
news:hja5qp$1dp$1@fred.mathworks.com...
> tpl@eng.cam.ac.uk (Tim Love) wrote in message
> <hj9t1u$584$1@gemini.csx.cam.ac.uk>...
>> "Chris" <AzizC0rn@bluestring.com> writes:
>>
>> >Dear all,
>>
>> >I need some help
>> use cells if you can, or type help eval
>> and look at the example
> I did the following with nesting an eval into another eval,
> for n=1:2
> D={'LLF1';'LLF2';'LLF3';'LLF4';'LLF5';'LLF6';'LLF7';'LLF8';'LLF9';'LLF10';}
> eval(['AIC' num2str(n) '=aicbic(eval(D{n}),1000,2)'])
> end
>
> however, I do not know how to estimate the BICi variable.
> Additionally, writing all these LLFs into the D matrix seems to be bad
> coding. I would be grateful If you have any suggestions on coding this in
> a clearer manner...

See Q4.6 in the newsgroup FAQ for some suggestions of alternative ways to
accomplish what you want.

--
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ