DOE All Possible Combinations

Question

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?

txnelson · Answer

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");

Peter_Bartell · Answer

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.

benson_munyan · Answer

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