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Jun 7, 2014 10:16 AM
(2052 views)

1 ACCEPTED SOLUTION

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Jun 7, 2014 1:25 PM
(3178 views)

Solution

Not enough observations to estimate the interaction effect. Add some replication and you'll be able to run the full factorial model. Try the script below to see the difference.

dt=Open**(** "$SAMPLE_DATA/Snapdragon.jmp" **)**<< **Concatenate****(**

Data Table**(** "Snapdragon.jmp" **)**,

Data Table**(** "Snapdragon.jmp" **)**,

Output Table**(** "ExpandedSnapdragon" **)**

**)**;

dt<<**New Column****(** "NewY",

Numeric,

Continuous,

Format**(** "Best", **12** **)**,

Formula**(** :Y + Random Normal**()** **)**,

Set Selected

**)**;

dt<<**Fit Model****(**

Y**(** :NewY **)**,

Effects**(** :Soil, :Block, :Soil * :Block **)**,

Personality**(** Standard Least Squares **)**,

Emphasis**(** Effect Leverage **)**,

Run**(**

:NewY << **{****Lack of Fit****(** **0** **)**, Plot Actual by Predicted**(** **1** **)**,

Plot Regression**(** **0** **)**, Plot Residual by Predicted**(** **1** **)**,

Plot Effect Leverage**(** **1** **)}**

**)**

**)**;

2 REPLIES

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Jun 7, 2014 1:25 PM
(3179 views)

Not enough observations to estimate the interaction effect. Add some replication and you'll be able to run the full factorial model. Try the script below to see the difference.

dt=Open**(** "$SAMPLE_DATA/Snapdragon.jmp" **)**<< **Concatenate****(**

Data Table**(** "Snapdragon.jmp" **)**,

Data Table**(** "Snapdragon.jmp" **)**,

Output Table**(** "ExpandedSnapdragon" **)**

**)**;

dt<<**New Column****(** "NewY",

Numeric,

Continuous,

Format**(** "Best", **12** **)**,

Formula**(** :Y + Random Normal**()** **)**,

Set Selected

**)**;

dt<<**Fit Model****(**

Y**(** :NewY **)**,

Effects**(** :Soil, :Block, :Soil * :Block **)**,

Personality**(** Standard Least Squares **)**,

Emphasis**(** Effect Leverage **)**,

Run**(**

:NewY << **{****Lack of Fit****(** **0** **)**, Plot Actual by Predicted**(** **1** **)**,

Plot Regression**(** **0** **)**, Plot Residual by Predicted**(** **1** **)**,

Plot Effect Leverage**(** **1** **)}**

**)**

**)**;

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Jun 7, 2014 2:08 PM
(1589 views)

Thanks MS. Your script was very helpful.

Since there is only one replicate for each soil*block combination, I can see why JMP was unable to estimate an interaction effect.