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- goodness of fit - include in a script

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Nov 13, 2017 6:23 AM
(755 views)

Dear all,

I'm triyng to add a goodness of fit after a distribution, using a script. There is a loop. The analysis is performed for n columns.

this is the part of the code:

disti = dt << Distribution( stack( 0 ), Continuous Distribution( Column( listName[i] )), Normal Quantile Plot( 1 ), Fit Distribution( Normal(Goodness of Fit( 1 ) )), Capability Analysis( 1 ), Invisible( 1 ) );

But no goodness of fit appears... and I don't konw why..

Do you have an idea?

What does it mean the "1" parameter of this function?

Thank you

Maïna

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Nov 13, 2017 6:36 AM
(1068 views)

Solution

I have expanded your script slightly, to make it a functioning script. Your code works well using the Semiconductor Capability data table. I suggest that you look at the makeup of your data or the list, "listName".

```
Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA\semiconductor capability.jmp" );
listName = dt << get column names( numeric, continuous );
For( i = 1, i <= 2, i++,
disti = dt << Distribution(
stack( 0 ),
Continuous Distribution( Column( listName[i] ) ),
Normal Quantile Plot( 1 ),
Fit Distribution( Normal( Goodness of Fit( 1 ) ) ),
Capability Analysis( 1 ),
Invisible( 1 )
)
);
```

Jim

8 REPLIES

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Nov 13, 2017 6:36 AM
(1069 views)

I have expanded your script slightly, to make it a functioning script. Your code works well using the Semiconductor Capability data table. I suggest that you look at the makeup of your data or the list, "listName".

```
Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA\semiconductor capability.jmp" );
listName = dt << get column names( numeric, continuous );
For( i = 1, i <= 2, i++,
disti = dt << Distribution(
stack( 0 ),
Continuous Distribution( Column( listName[i] ) ),
Normal Quantile Plot( 1 ),
Fit Distribution( Normal( Goodness of Fit( 1 ) ) ),
Capability Analysis( 1 ),
Invisible( 1 )
)
);
```

Jim

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Nov 13, 2017 6:41 AM
(747 views)

Thank you Jim,

I have already do this loop :) IThe script is bigger !

My first script was like that:

The distribution appears, the capability analysis too, but not the goodness of fit test...

I don't understand why ;(

```
disti = dt << Distribution(
stack( 0 ),
Continuous Distribution( Column( listName[i] ) ),
Normal Quantile Plot( 1 ),
Capability Analysis( 1 ),
Invisible( 1 )
```

But I want to add a goodness of fit analysis below the histogram of the distribution.

Tks

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Nov 13, 2017 6:53 AM
(745 views)

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Nov 13, 2017 6:58 AM
(740 views)

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Nov 13, 2017 7:18 AM
(730 views)

I used your script, and just attached a different data table, so that is why I suggested that you need to look elsewhere.

Jim

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Nov 13, 2017 7:32 AM
(724 views)

Or do I have no place to display the result?

Would that be possible?

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Nov 13, 2017 7:38 AM
(720 views)

Are the columns you are analyzing of Modeling Type Continuous? If they are Ordinal or Nominal, they will not provide a goodness of fit

Jim

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Nov 13, 2017 7:43 AM
(718 views)