<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />Hi there,
I have noticed some 'weird' behavior of the Weibull distribution using the simulator in the profiler platform. For narrow distributions, meaning large beta, the distribution seems to split down the middle. I am guessing this is not the normal behavior of a Weibull distribution. The output of a simulation seems to be unaffected by the weird behavior, so it might just be a graphical issue. Has anyone else noticed this behavior? Is there a bug here?
Profiler example:
Simulation output:
Code:
Table 1 = New Table( "Table 1",
Add Rows( 1 ),
New Column( "p1", Numeric, "Continuous", Format( "Best", 12 ), Set Values( [3] ) ),
New Column( "p2", Numeric, "Continuous", Format( "Best", 12 ), Set Values( [3] ) ),
New Column( "model",
Numeric,
"Continuous",
Format( "Best", 12 ),
Formula( :p1 ^ 2 + :p2 ^ 2 ),
Set Selected
),
Set Row States( [1] )
);
Profiler(
Y( :model ),
Profiler(
1,
Term Value(
p1( 3, Min( 2.8 ), Max( 3.2 ), Lock( 0 ), Show( 1 ) ),
p2( 3, Min( 2.8 ), Max( 3.2 ), Lock( 0 ), Show( 1 ) )
),
Simulator(
1,
Factors(
p1 << Random( Weibull( 200, 3 ) ),
p2 << Random( Weibull( 180, 3 ) )
),
Responses( model << No Noise )
)
),
SendToReport(
Dispatch(
{"Prediction Profiler"},
"2",
ScaleBox,
{Min( 2.8 ), Max( 3.2 ), Inc( 0.05 ), Minor Ticks( 1 )}
),
Dispatch(
{"Prediction Profiler"},
"1",
ScaleBox,
{Min( 2.8 ), Max( 3.2 ), Inc( 0.05 ), Minor Ticks( 1 )}
),
Dispatch(
{"Prediction Profiler"},
"Profiler",
FrameBox,
{Frame Size( 188, 114 )}
),
Dispatch(
{"Prediction Profiler"},
"Profiler Simulator Distribution",
FrameBox,
{Frame Size( 178, 104 )}
),
Dispatch(
{"Prediction Profiler"},
"Profiler",
FrameBox( 3 ),
{Frame Size( 188, 114 )}
),
Dispatch(
{"Prediction Profiler"},
"Profiler Simulator Distribution",
FrameBox( 2 ),
{Frame Size( 178, 104 )}
)
)
);
I agree with Ian@JMP .
It appears to be a just a graphical bug that has been corrected in JMP 13.
-Jeff
FWIW (with JMP 12.2 on a Mac) and your code, I see the same thing.
But with JMP 13, I see:
