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weight by syntax

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jimjohn

weight by syntax

can someone plz help me with this, im trying to understand this syntax: i thought this is just a multiple regression model with redrate_m vs (saving3, saving3_sq, age) for different values of balbucket (either 1, 2, or 3). but if i just filter balbucket and run the regression model i get different output. so im just wondering what does this WEIGHT BY rembal do to change my regression output? thanks so much.

WEIGHT
BY rembal .
SORT CASES BY balbucket .
SPLIT FILE
LAYERED BY balbucket .
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA CHANGE
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate_m
/METHOD=ENTER saving3 /enter saving3_sq /enter age .

Hector Maletta

Re: weight by syntax

No time to go into the problem right now, but just an offhand comment:
Weight, I believe, has nothing to do with it. Each case has a weight, and
the weight of a case does not change when you filter cases or split the
file. Filter executes a binary decision (selects a case if the condition if
the filter variable equals 1, and leaves it out if the filter variable does
not equal 1). Since BALBUCKET has three possible values, this may be a
source of differences with SPLIT FILE.
Hector

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
jimjohn
Sent: 17 April 2008 17:36
To: [hidden email]
Subject: weight by syntax

can someone plz help me with this, im trying to understand this syntax: i
thought this is just a multiple regression model with redrate_m vs (saving3,
saving3_sq, age) for different values of balbucket (either 1, 2, or 3). but
if i just filter balbucket and run the regression model i get different
output. so im just wondering what does this WEIGHT BY rembal do to change my
regression output? thanks so much.

WEIGHT
BY rembal .
SORT CASES BY balbucket .
SPLIT FILE
LAYERED BY balbucket .
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA CHANGE
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate_m
/METHOD=ENTER saving3 /enter saving3_sq /enter age .
--
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jimjohn

Re: weight by syntax

thanks guys let me try to explain this problem better.

so when i implement the syntax written in my original comment:
my output gives me nine different regression outputs, for example:
for balbucket 1, i get the following 3 regression outputs:
redrate_m vs saving3, redrate_m vs saving3 and saving3_sq, and redrate_m vs saving3, saving3_sq, age

and so i get those same three regressino models for balbucket2 and for balbucket3.

now without using any syntax, i want to get the same regression output result that i got for balbucket 1: redrate_m vs saving3, saving3_sq, and age
so i go select cases -> balbucket = 1. then i go to the regression and i should be getting the same output but i dont. here is the syntax that shows up from what i do:

USE ALL.
COMPUTE filter_$=(balbucket = 1).
VARIABLE LABEL filter_$ 'balbucket = 1 (FILTER)'.
VALUE LABELS filter_$ 0 'Not Selected' 1 'Selected'.
FORMAT filter_$ (f1.0).
FILTER BY filter_$.
EXECUTE.
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate
/METHOD=ENTER saving3 saving3_sq age.

so im not understanding why i get a different regression output for balbucket1 regression. the one thing i dont really understand in the syntax i used in the beginning was WEIGHT BY so im thinking this must have something to do with why the results are different. any ideas? thanks.

Hector Maletta wrote

No time to go into the problem right now, but just an offhand comment:
Weight, I believe, has nothing to do with it. Each case has a weight, and
the weight of a case does not change when you filter cases or split the
file. Filter executes a binary decision (selects a case if the condition if
the filter variable equals 1, and leaves it out if the filter variable does
not equal 1). Since BALBUCKET has three possible values, this may be a
source of differences with SPLIT FILE.
Hector

-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
jimjohn
Sent: 17 April 2008 17:36
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: weight by syntax

can someone plz help me with this, im trying to understand this syntax: i
thought this is just a multiple regression model with redrate_m vs (saving3,
saving3_sq, age) for different values of balbucket (either 1, 2, or 3). but
if i just filter balbucket and run the regression model i get different
output. so im just wondering what does this WEIGHT BY rembal do to change my
regression output? thanks so much.

WEIGHT
BY rembal .
SORT CASES BY balbucket .
SPLIT FILE
LAYERED BY balbucket .
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA CHANGE
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate_m
/METHOD=ENTER saving3 /enter saving3_sq /enter age .
--
View this message in context:
http://www.nabble.com/weight-by-syntax-tp16754311p16754311.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
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=====================
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Oliver, Richard

Re: weight by syntax

Weight will definitely affect your results unless the value of the weight variable is a constant. Consider the following very simple example:

data list list /x y z.
begin data
1 2 1
2 4 1
3 1 5
4 5 1
end data.
REGRESSION
/DEPENDENT x
/METHOD=ENTER y.
WEIGHT BY Z.
REGRESSION
/DEPENDENT x
/METHOD=ENTER y.

The WEIGHT command basically says: Treat every case as if there were N cases with these values, where N is the value of the WEIGHT variable. In this case, once you weight the data, there are five cases with a values of 3 and 1 for for x and y respectively instead of just one.

________________________________

From: SPSSX(r) Discussion on behalf of jimjohn
Sent: Thu 4/17/2008 4:43 PM
To: [hidden email]
Subject: Re: weight by syntax

thanks guys let me try to explain this problem better.

so when i implement the syntax written in my original comment:
my output gives me nine different regression outputs, for example:
for balbucket 1, i get the following 3 regression outputs:
redrate_m vs saving3, redrate_m vs saving3 and saving3_sq, and redrate_m vs
saving3, saving3_sq, age

and so i get those same three regressino models for balbucket2 and for
balbucket3.

now without using any syntax, i want to get the same regression output
result that i got for balbucket 1: redrate_m vs saving3, saving3_sq, and age
so i go select cases -> balbucket = 1. then i go to the regression and i
should be getting the same output but i dont. here is the syntax that shows
up from what i do:

USE ALL.
COMPUTE filter_$=(balbucket = 1).
VARIABLE LABEL filter_$ 'balbucket = 1 (FILTER)'.
VALUE LABELS filter_$ 0 'Not Selected' 1 'Selected'.
FORMAT filter_$ (f1.0).
FILTER BY filter_$.
EXECUTE.
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate
/METHOD=ENTER saving3 saving3_sq age.

so im not understanding why i get a different regression output for
balbucket1 regression. the one thing i dont really understand in the syntax
i used in the beginning was WEIGHT BY so im thinking this must have
something to do with why the results are different. any ideas? thanks.

Hector Maletta wrote:

>
> No time to go into the problem right now, but just an offhand comment:
> Weight, I believe, has nothing to do with it. Each case has a weight, and
> the weight of a case does not change when you filter cases or split the
> file. Filter executes a binary decision (selects a case if the condition
> if
> the filter variable equals 1, and leaves it out if the filter variable
> does
> not equal 1). Since BALBUCKET has three possible values, this may be a
> source of differences with SPLIT FILE.
> Hector
>
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
> jimjohn
> Sent: 17 April 2008 17:36
> To: [hidden email]
> Subject: weight by syntax
>
> can someone plz help me with this, im trying to understand this syntax: i
> thought this is just a multiple regression model with redrate_m vs
> (saving3,
> saving3_sq, age) for different values of balbucket (either 1, 2, or 3).
> but
> if i just filter balbucket and run the regression model i get different
> output. so im just wondering what does this WEIGHT BY rembal do to change
> my
> regression output? thanks so much.
>
> WEIGHT
> BY rembal .
> SORT CASES BY balbucket .
> SPLIT FILE
> LAYERED BY balbucket .
> REGRESSION
> /MISSING LISTWISE
> /STATISTICS COEFF OUTS R ANOVA CHANGE
> /CRITERIA=PIN(.05) POUT(.10)
> /NOORIGIN
> /DEPENDENT redrate_m
> /METHOD=ENTER saving3 /enter saving3_sq /enter age .
> --
> View this message in context:
> http://www.nabble.com/weight-by-syntax-tp16754311p16754311.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
>

--
View this message in context: http://www.nabble.com/weight-by-syntax-tp16754311p16756378.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

====================To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
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Hector Maletta

Re: weight by syntax

Of course weighting in one variant and not weighting in the other variant
will affect the results. The same would happen with any procedure: a
weighted crosstabs will be different that an unweighted one. But weighting
per se (applied in both variants) would not affect anything regarding the
specific problem posed in this thread.
Hector

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
Oliver, Richard
Sent: 17 April 2008 21:13
To: [hidden email]
Subject: Re: weight by syntax

Weight will definitely affect your results unless the value of the weight
variable is a constant. Consider the following very simple example:

data list list /x y z.
begin data
1 2 1
2 4 1
3 1 5
4 5 1
end data.
REGRESSION
/DEPENDENT x
/METHOD=ENTER y.
WEIGHT BY Z.
REGRESSION
/DEPENDENT x
/METHOD=ENTER y.

The WEIGHT command basically says: Treat every case as if there were N cases
with these values, where N is the value of the WEIGHT variable. In this
case, once you weight the data, there are five cases with a values of 3 and
1 for for x and y respectively instead of just one.

________________________________

From: SPSSX(r) Discussion on behalf of jimjohn
Sent: Thu 4/17/2008 4:43 PM
To: [hidden email]
Subject: Re: weight by syntax

thanks guys let me try to explain this problem better.

so when i implement the syntax written in my original comment:
my output gives me nine different regression outputs, for example:
for balbucket 1, i get the following 3 regression outputs:
redrate_m vs saving3, redrate_m vs saving3 and saving3_sq, and redrate_m vs
saving3, saving3_sq, age

and so i get those same three regressino models for balbucket2 and for
balbucket3.

now without using any syntax, i want to get the same regression output
result that i got for balbucket 1: redrate_m vs saving3, saving3_sq, and age
so i go select cases -> balbucket = 1. then i go to the regression and i
should be getting the same output but i dont. here is the syntax that shows
up from what i do:

USE ALL.
COMPUTE filter_$=(balbucket = 1).
VARIABLE LABEL filter_$ 'balbucket = 1 (FILTER)'.
VALUE LABELS filter_$ 0 'Not Selected' 1 'Selected'.
FORMAT filter_$ (f1.0).
FILTER BY filter_$.
EXECUTE.
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT redrate
/METHOD=ENTER saving3 saving3_sq age.

so im not understanding why i get a different regression output for
balbucket1 regression. the one thing i dont really understand in the syntax
i used in the beginning was WEIGHT BY so im thinking this must have
something to do with why the results are different. any ideas? thanks.

Hector Maletta wrote:

--
View this message in context:
http://www.nabble.com/weight-by-syntax-tp16754311p16756378.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
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[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
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For a list of commands to manage subscriptions, send the command
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To manage your subscription to SPSSX-L, send a message to
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=====================
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