Turf Analysis - SPSS

[Shamvir]

Hello all,

In John's extension of turf the output has a column labelled "Pct of Responses", what is the data in this column and how was it calculated?


All responses will be highly appreciated,

Regards,
S.S.

[Jon K Peck]

The reach of a set of variables gives the number of cases where any variable in the set has a positive response, and Pct of Cases shows what percentage of the cases are reached.

The frequency of a set of variables gives the number of positive responses in the set.  It is always greater than or equal to the reach.  The Pct of Responses shows the percentage of the total number of positive responses that are accounted for in this set,

If the data are

q1        q2        q3        q4
1        1        0        0
1        0        1        0
0        0        1        0
1        1        0        0
0        0        0        0
1        0        0        0

then the best two-variable reach is q1 + q3.  That reaches 5 cases - four from q1 plus incrementally 1 from q3, and the percentage is 5/6 * 100.

The frequency of q1 + q3 is 6, and the percentage is 6/8 * 100.  q1 + q3 accounts for 6 of the 8 total positive responses.

In this dataset, q1 + q2 comes second with a reach of 4, but its frequency is also 6 and therefore has the same Pct of Responses.

HTH,

Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
new phone: [phone]




From:        Shamvir <[hidden email]>
To:        [hidden email]
Date:        01/30/2012 10:51 AM
Subject:        [SPSSX-L] Turf Analysis - SPSS
Sent by:        "SPSSX(r) Discussion" <[hidden email]>

---

Hello all,

In John's extension of turf the output has a column labelled "Pct of
Responses", what is the data in this column and how was it calculated?


All responses will be highly appreciated,

Regards,
S.S.


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[CG]

I am out of the office until February 2.  For immediate assistance please contact:

Tom Dauphinee ([hidden email]),

Robert Romero [hidden email] (Assessments)505.827.6524;

Jessica Jaramillo (Procurement) [hidden email] 505.827.3888;

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Thank you.

 

[Shamvir]

I heard your response time is quick but I never thought it would be this quick - Super!

Does this new version of the turf analysis allows the weighting option or is that still under development?

Regards,
S.S.

[Shamvir]

I heard your response time is quick but I never thought it would be this quick - Super!

Does this new version of the turf analysis allows the weighting option or is that still under development?

Regards,
S.S.

[Shamvir]

I heard your response time is quick but I never thought it would be this quick - Super!

Does this new version of the turf analysis allows the weighting option or is that still under development?

Regards,
S.S.

[Shamvir]

I heard your response time is quick but I never thought it would be this quick - Super!

Does this new version of the turf analysis allows the weighting option or is that still under development?

Regards,
S.S.

[mils]

Hi,

This is Jon example, using SPSS v22:

DATA LIST list / q1 q2 q3 q4.
BEGIN DATA
1        1        0        0
1        0        1        0
0        0        1        0
1        1        0        0
0        0        0        0
1        0        0        0
END DATA
DATASET NAME Orig.

DATASET ACTIVATE Orig.
SPSSINC TURF VARIABLES = q1 q2 q3 q4
/OPTIONS BESTN = 4 NUMBERTODISPLAY = 4 CRITERIA = 1
REMOVALCYCLES = 0. MAXSETS=5000000
/IMPORTANCE STRICT=YES.

Maximum Group Size: 1.  Reach and Frequency.
Variables Statistics
        Reach Pct of Cases Frequency Pct of Responses
q1 4 66.7 4 50.0
q3 2 33.3 2 25.0
q2 2 33.3 2 25.0
Variables: q1, q2, q3



Maximum Group Size: 2.  Reach and Frequency.
Variables Statistics
        Reach Pct of Cases Frequency Pct of Responses
q1, q3 5 83.3 6 75.0
q1, q2 4 66.7 6 75.0
q1 4 66.7 4 50.0
q2, q3 4 66.7 4 50.0
Variables: q1, q2, q3

Maximum Group Size: 3.  Reach and Frequency.
Variables Statistics
        Reach Pct of Cases Frequency Pct of Responses
q1, q2, q3 5 83.3 8 100.0
q1, q3 5 83.3 6 75.0
q1, q2 4 66.7 6 75.0
q1 4 66.7 4 50.0
Variables: q1, q2, q3


Best Reach and Frequency by Group Size
Variables Statistics
        Group Size Reach Pct of Cases Frequency Pct of Responses
ADDED: q1 1 4 66.7 4 50.0
ADDED: q3
KEPT: q1 2 5 83.3 6 75.0
ADDED: q2
KEPT: q1, q3 3 5 83.3 8 100.0


Thanks.

[mils]

Hi,

What if the data that I have, it shows the rating values? Let's say I have 4 different flavors and this are the ratings of 6 people:

DATA LIST list / q1 q2 q3 q4.
BEGIN DATA
3        3        5        5
1        3        5        2
5        4        6        2
6        4        6        1
7        2        1        7
6        1        1        7
END DATA
DATASET NAME Orig.

How do I run Turf Analysis in this case? Do I need to transform the data?

thanks,

[Jon K Peck]

All you need to do in this case is to specify the values of the rating to treat as positive responses.  You can experiment with different cutoffs to see if that changes the optimal bundles.


Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
phone: [phone]




From:        mils <[hidden email]>
To:        [hidden email]
Date:        05/01/2015 10:36 AM
Subject:        Re: [SPSSX-L] Turf Analysis - SPSS
Sent by:        "SPSSX(r) Discussion" <[hidden email]>

---

Hi,

What if the data that I have, it shows the rating values? Let's say I have 4
different flavors and this are the ratings of 6 people:

DATA LIST list / q1 q2 q3 q4.
BEGIN DATA
3        3        5        5
1        3        5        2
5        4        6        2
6        4        6        1
7        2        1        7
6        1        1        7
END DATA
DATASET NAME Orig.

How do I run Turf Analysis in this case? Do I need to transform the data?

thanks,



-----
mils
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===================== 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