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303 lines
7.9 KiB
Plaintext
303 lines
7.9 KiB
Plaintext
************************************************************************************************************
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* DETECT: detect, Iss and R indexes
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* Version 3.1: May 13, 2004
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*
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* Historic
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* Version 1 (2003-06-20): Jean-Benoit Hardouin
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* Version 2 (2004-01-18): Jean-Benoit Hardouin
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* Version 3 (2004-01-26): Jean-Benoit Hardouin
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* Version 3.1 (2004-05-13): Jean-Benoit Hardouin
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* Version 4 (2009-11-24): Jean-Benoit Hardouin /*corrections*/
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*
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* Jean-benoit Hardouin, Regional Health Observatory of Orléans - France
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* jean-benoit.hardouin@neuf.fr
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*
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* News about this program : http://anaqol.free.fr
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* FreeIRT Project : http://freeirt.free.fr
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*
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* Copyright 2003, 2004 Jean-Benoit Hardouin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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************************************************************************************************************
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program define detect , rclass
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version 7.0
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syntax varlist(min=2 numeric), PARTition(numlist integer >0) [noSCOres noRESTscores]
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local nbitemstest=0
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tokenize `partition'
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local Q:word count `partition'
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local firstitem=0
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local dim0=1
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forvalues i=1/`Q' {
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local dim`i'=``i''
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local firstitem`i'=`firstitem`=`i'-1''+`dim`=`i'-1''
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local nbitemstest=`nbitemstest'+`dim`i''
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tempvar score`i'
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qui gen `score`i''=0
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forvalues j=`firstitem`i''/`=`firstitem`i''+`dim`i''-1' {
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local item`j': word `j' of `varlist'
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qui replace `score`i''=`score`i''+`item`j''
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}
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}
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local nbitems:word count `varlist'
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tokenize `varlist'
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if `nbitems'!=`nbitemstest' {
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di in red "The sum of the numbers of items in all the dimensions is different of the total number of items precised in varlist"
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exit
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}
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tempname Corrscores Corrrestscores
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matrix define `Corrscores'=J(`nbitems',`Q',0)
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matrix define `Corrrestscores'=J(`nbitems',`Q',0)
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forvalues i=1/`nbitems' {
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forvalues j=1/`Q' {
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tempvar restscore`i's`j'
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qui gen `restscore`i's`j''=`score`j''-``i''
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qui corr ``i'' `score`j''
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local corr`i's`j'=r(rho)
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qui corr ``i'' `restscore`i's`j''
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local corr`i'rs`j'=r(rho)
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matrix `Corrscores'[`i',`j']=`corr`i's`j''
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matrix `Corrrestscores'[`i',`j']=`corr`i'rs`j''
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}
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}
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qui count
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local nbind=r(N)
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tempvar score
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qui gen `score'=0
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forvalues i=1/`nbitems' {
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qui replace `score'=`score'+``i''
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}
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forvalues i=1/`nbitems' {
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local tmp=`i'+1
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forvalues j=`tmp'/`nbitems' {
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tempvar restscorei`i'j`j'
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qui gen `restscorei`i'j`j''=`score'-``i''-``j''
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}
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}
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forvalues k=0/`nbitems'{
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tempname Tcov`k'
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qui count if `score'==`k'
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local n`k'=r(N)
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if `n`k''>1 {
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qui matrix accum `Tcov`k''=`varlist' if `score'==`k',nocons dev
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}
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else {
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matrix `Tcov`k''=J(`nbitems',`nbitems',0)
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}
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if `n`k''!=0 {
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matrix `Tcov`k''=`Tcov`k''/`n`k''
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}
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}
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forvalues i=1/`nbitems'{
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local tmp=`i'+1
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forvalues j=`tmp'/`nbitems' {
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local tmp=`nbitems'-2
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forvalues k=0/`tmp' {
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tempname Rcovi`i'j`j'k`k'
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qui count if `restscorei`i'j`j''==`k'
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local ni`i'j`j'k`k'=r(N)
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if `ni`i'j`j'k`k''>1 {
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qui matrix accum `Rcovi`i'j`j'k`k''=`varlist' if `restscorei`i'j`j''==`k',nocons dev
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}
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else {
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matrix `Rcovi`i'j`j'k`k''=J(`nbitems',`nbitems',0)
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}
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if `ni`i'j`j'k`k''!=0 {
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matrix `Rcovi`i'j`j'k`k''=`Rcovi`i'j`j'k`k''/`ni`i'j`j'k`k''
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}
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}
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}
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}
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tempname delta
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matrix `delta'=J(`nbitems',`nbitems',-1)
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local debut=1
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local fin=0
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forvalues i=1/`Q' {
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local fin=`fin'+`dim`i''
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forvalues j=`debut'/`fin' {
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forvalues k=`debut'/`fin' {
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matrix `delta'[`j',`k']=1
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}
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}
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local debut=`debut'+`dim`i''
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}
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tempname Tcov Rcov Covfin Issm Abscov
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matrix `Tcov'=J(`nbitems',`nbitems',0)
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matrix `Rcov'=J(`nbitems',`nbitems',0)
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forvalues k=0/`nbitems' {
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matrix `Tcov'=`Tcov'+`Tcov`k''*`n`k''
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}
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forvalues i=1/`nbitems'{
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local tmp=`i'+1
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forvalues j=`tmp'/`nbitems' {
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local tmp=`nbitems'-2
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forvalues k=0/`tmp' {
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matrix `Rcov'[`i',`j']=`Rcov'[`i',`j']+`Rcovi`i'j`j'k`k''[`i',`j']*`ni`i'j`j'k`k''
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matrix `Rcov'[`j',`i']=`Rcov'[`i',`j']
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}
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}
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}
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matrix `Covfin'=J(`nbitems',`nbitems',0)
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matrix `Issm'=J(`nbitems',`nbitems',0)
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matrix `Abscov'=J(`nbitems',`nbitems',0)
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forvalues i=1/`nbitems' {
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forvalues j=1/`nbitems' {
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matrix `Covfin'[`i',`j']=(`Tcov'[`i',`j']+`Rcov'[`i',`j'])/2*`delta'[`i',`j']
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matrix `Issm'[`i',`j']=sign(`Tcov'[`i',`j']+`Rcov'[`i',`j'])*`delta'[`i',`j']
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matrix `Abscov'[`i',`j']=abs(`Tcov'[`i',`j']+`Rcov'[`i',`j'])/2
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}
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}
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local somme=0
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local Iss=0
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local R=0
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forvalues i=1/`nbitems' {
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local tmp=`i'+1
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forvalues j=`tmp'/`nbitems' {
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local somme=`somme'+`Covfin'[`i',`j']
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local Iss=`Iss'+`Issm'[`i',`j']
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local R=`R'+`Abscov'[`i',`j']
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}
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}
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local DETECT=`somme'/(`nbind'*`nbitems'*(`nbitems'-1))
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local DETECT=`somme'/(`nbitems'*(`nbitems'-1))
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local Iss=`Iss'*2/(`nbitems'*(`nbitems'-1))
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*local R=`DETECT'/(`R'/(`nbind'*`nbitems'*(`nbitems'-1)))
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local R=`DETECT'/(`R'/(`nbitems'*(`nbitems'-1)))
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di
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di in green _col(20) "DETECT : " as result %5.4f `DETECT'
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di in green _col(23) "Iss : " as result %5.4f `Iss'
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di in green _col(25) "R : " as result %5.4f `R'
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di
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if "`scores'"=="" {
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di _col(5) in green "Correlations Items-Scores"
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di in green _col(5) "{hline 25}"
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di
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di in green _col(5) "Items" _continue
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local col=10
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forvalues q=1/`Q' {
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local col=`col'+10
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di in green _col(`col') "dim `q'" _continue
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}
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di
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local length=`Q'*10+10
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di in green _col(5) "{hline `length'}"
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forvalues i=1/`nbitems' {
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forvalues q=2/`Q' {
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if `i'==`firstitem`q'' {
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di _col(5) in green _dup(`length') "-"
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}
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}
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di in green _col(5) "``i''" _continue
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local col=5
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forvalues q=1/`Q' {
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local col=`col'+10
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di in yellow _col(`col') %10.4f `corr`i's`q'' _continue
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}
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di
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}
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di in green _col(5) "{hline `length'}"
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di
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}
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if "`restscore'"=="" {
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di _col(5) in green "Correlations Items-Rest-Scores"
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di in green _col(5) "{hline 30}"
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di
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di in green _col(5) "Items" _continue
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local col=10
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forvalues q=1/`Q' {
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local col=`col'+10
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di in green _col(`col') "dim `q'" _continue
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}
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di
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local length=`Q'*10+10
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di in green _col(5) "{hline `length'}"
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forvalues i=1/`nbitems' {
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forvalues q=2/`Q' {
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if `i'==`firstitem`q'' {
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di _col(5) in green _dup(`length') "-"
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}
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}
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di in green _col(5) "``i''" _continue
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local col=5
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forvalues q=1/`Q' {
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local col=`col'+10
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di in yellow _col(`col') %10.4f `corr`i'rs`q'' _continue
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}
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di
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}
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di in green _col(5) "{hline `length'}"
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di
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}
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local namesdim
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forvalues q=1/`Q' {
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local namesdim "`namesdim' dim`q'"
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}
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matrix rownames `Tcov'=`varlist'
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matrix rownames `Rcov'= `varlist'
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matrix rownames `Covfin'= `varlist'
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matrix rownames `Corrscores'= `varlist'
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matrix rownames `Corrrestscores'= `varlist'
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matrix colnames `Tcov'= `varlist'
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matrix colnames `Rcov' =`varlist'
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matrix colnames `Covfin'= `varlist'
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matrix colnames `Corrscores'= `namesdim'
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matrix colnames `Corrrestscores'= `namesdim'
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return scalar DETECT=`DETECT'
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return scalar Iss=`Iss'
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return scalar R=`R'
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return matrix Tcov `Tcov'
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return matrix Rcov `Rcov'
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return matrix Covfin `Covfin'
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return matrix Corrscores `Corrscores'
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return matrix Corrrestscores `Corrrestscores'
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end
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