Re: st: Conformability error after using -nldecompose- with survey data

[Steve Samuels <sjsamuels@gmail.com>]

This can happen if  -logit- drops a collinear variable or one that predicts perfectly in one of the -by- groups. The dropped variable results in a discrepancy between the local `dim1' which counts the original  independent variables, and the number of columns in e(b).


*****************************************
sysuse auto, clear
gen r78 = rep78>=3
gen high = turn >33

svyset _n
logit: high r78 mpg weight if foreign==0
set trace on
nldeompose, by(foreign):logit high r78 mpg weight
set trace off
**************************************************


Stev
On Nov 11, 2013, at 9:28 PM, Saidé Salazar wrote:

Thank you for the advice Sergiy. Below is the location of the error in
the trace.

Any help will be very appreciated!


------------------------------------------------------------------------------------------------------------------
end est ---
 - mat `getbA' = e(b)
 = mat __00000F = e(b)
 - local dim1 = wordcount("`indvar'")
 = local dim1 = wordcount("s_size_1 s_size_3 S_SECTOR_2 S_SECTOR_3
TL_TAM_LOC_2 TL_TAM_LOC_3")
 - local dim2 = colsof(`getbA')
 = local dim2 = colsof(__00000F)
 - if ("`regcmd'"!="zip" & "`regcmd'"!="zinb" & "`regcmd'"!="ologit"
& "`regcmd'"!="oprobit") {
 = if ("logit"!="zip" & "logit"!="zinb" & "logit"!="ologit" &
"logit"!="oprobit") {
 - mat `betaA' = `getbA'[1,1..`dim1'+1]
 = mat __00000G = __00000F[1,1..6+1]
conformability error
   local k1 = `dim1'+1
   }
 ------------------------------------------------------------------------------------------
end nldecompose.nld_decomposition ---
 if "`bs_step'" == "" {
 nld_setreturns
 ereturn clear
 sreturn clear
 }
 }
--------------------------------------------------------------------------------------------------------------
end nldecompose ---
r(503);

On Mon, Nov 11, 2013 at 6:23 PM, Sergiy Radyakin <serjradyakin@gmail.com> wrote:
> Saide, insert
> set trace on
> before calling nldecompose... and show us what is the location of the
> error in the trace.
> 
> In general no command (official or user written) should report this
> error. It is evidence of unforeseen situation, for example of rare
> combination of inputs. -nldecompose- is doing a lot of matrix
> operations, see source:
> http://www.stata-journal.com/software/sj8-4/st0152/nldecompose.ado
> 
> Best, Sergiy
> 
> 
> 
> On Mon, Nov 11, 2013 at 6:34 PM, Saidé Salazar <saide.salazar@gmail.com> wrote:
>> Dear Statalist members
>> 
>> I am using -nldecompose- after a logistic regression with survey data,
>> and I am getting a "conformability error". Can anyone help me to
>> understand why is this happening?
>> 
>> Here is my command line:
>> 
>> . nldecompose, by(country):svy: logit y x1 x2 x3 x4 x5 x6
>> conformability error
>> r(503);
>> 
>> The -logit- runs okay without the -nldecompose- option.
>> 
>> Thank you very much!
>> 
>> Saide
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