topic Re: DOE All Possible Combinations in Discussions

DOE All Possible Combinations

benson_munyan — Fri, 15 Apr 2016 21:49:58 GMT

Hello all,

I have a relatively problem that I can't seem to crack within the DOE platform. I've done it before, but now I can't recall how precisely.

I am collecting two measurements (Valence and Intensity) across 4 samples. I want to control for the order the samples are presented. I want to create a table with all possible order of samples (preferably 2 sets, so each combination appears twice).

I have set Sample as a catagorical, 4 level factor.
I have tried time as both catagorical and continuous, without luck.

What am I missing?

Re: DOE All Possible Combinations

txnelson — Wed, 19 Oct 2016 02:26:12 GMT

If I am interpreting what you are asking for, you need a Full Factorial Design with 2 Responses, and 4 Factors, each with 4 levels, and 1 Replicate.

It produces a table with a randomized order of all possible combinations times 2.

Re: DOE All Possible Combinations

benson_munyan — Sun, 17 Apr 2016 15:27:04 GMT

Hi Jim!

Thank you for your response. That is pretty close! One thing I failed to specify was that I only need each factor to appear once in each pattern.

For Example

1234

1243

1342

1324

Re: DOE All Possible Combinations

Peter_Bartell — Mon, 18 Apr 2016 12:51:46 GMT

Thinking out loud here...can you accomplish this in the Custom Design platform through using the disallowed combinations filter? Essentially you're constraining your design space so any time I see that I'm led to the JMP Custom Design platform.

Re: DOE All Possible Combinations

txnelson — Mon, 18 Apr 2016 14:26:53 GMT

If all you are looking for is a test order generator, and not a complete DOE solution, the little "brute force" script I put together will give you random test orders for all of the combinations you are looking for:

dt = New Table( "Order", New Column( "Group" ), New Column( "Order", character ), New Column( "Random" ) );

For( a = 1, a <= 4, a++,

For( b = 1, b <= 4, b++,

For( c = 1, c <= 4, c++,

For( d = 1, d <= 4, d++,

Pattern = Char( a ) || Char( b ) || Char( c ) || Char( d );

If(

Sum(

Contains( pattern, "1" ) > 0,

Contains( pattern, "2" ) > 0,

Contains( pattern, "3" ) > 0,

Contains( pattern, "4" ) > 0

) == 4,

dt << add rows( 2 );

dt:Group[N Rows( dt ) - 1] = 1;

dt:Group[N Rows( dt )] = 2;

dt:Order[N Rows( dt ) - 1] = pattern;

dt:Order[N Rows( dt )] = pattern;

dt:Random[N Rows( dt ) - 1] = Random Uniform();

dt:Random[N Rows( dt )] = Random Uniform();

);

)

);

dt << Sort(

By( :Group, :Random ),

Order( Ascending, Ascending ),

Replace table( 1 )

);

dt << delete Columns("Random");