information about ciboot command
MARIGO RAFFAELLA
R.MARIGO at arpalombardia.it
Wed Mar 30 09:34:06 CEST 2011
Hi,
I'm Raffaella Marigo from Italy, may I have some information about the bootstrap command "ciboot" (stixbox module)
I have some problem because I don't understand the calling sequence: ci = ciboot(x,'T',method,C,B)
In particular, I don't understand the meaning of 'T', is it the shape of the distribution?
I wrote these commands
x=grand(1,1000,"unf",0,323); // N=1000 random numbers generated from a uniform distribution on [0,323]
bx=rboot(x,[,1000]); //bootstrap resampling
tbx=trimmean(bx,25,2); // trimmed mean calculated for each resampling
mbx=trimmean(tbx) //boostrap trimmed mean
sx=stdboot(tbx,'norm') //median standard error
ci=ciboot(q,'norm',6,0.95,1000)
and the result is:
-->x=grand(1,1000,"unf",0,323); // N=1000 random numbers generated from a uniform distribution on [0,323]
-->bx=rboot(x,[,1000]); //bootstrap resampling
-->tbx=trimmean(bx,25,2); // trimmed mean calculated for each resampling
-->mbx=trimmean(tbx) //boostrap trimmed mean
mbx =
159.55854
-->sx=stdboot(tbx,'norm') //median standard error
sx =
3.366777
-->ci=ciboot(q,'norm',6,0.95,1000)
ci=ciboot(q,'norm',6,0.95,1000)
!--error 4
There is an undefined variable: q
at line 6 of exec file called by :
exec('C:\Documents and Settings\RMARIGO\Impostazioni locali\Temp\SCI_TMP_3564_\LOAD_INTO_SCILAB-2323182087522029687.sce', 1)
while executing a callback
Could you help me?
Thanks a lot
Best regards
Raffaella Marigo
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