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Random Uniform() keeps giving me the same number

My script is returning random values from Random Uniform(), until I write some results to a data table.  When I write to the table Random Uniform() always returns the same value.   See comments in script below.  Would appreciate any help. 

 

Many thanks, 

John

 

names default to here(1);
clear log();
include("defineVectorClass.jsl");
dtChaos = open("chaos.jmp");
proportionToCorner = 0.5;
A = new object(Vector(column(dtChaos,"x")[1],column(dtChaos,"y")[1]));
B = new object(Vector(column(dtChaos,"x")[2],column(dtChaos,"y")[2]));
C = new object(Vector(column(dtChaos,"x")[3],column(dtChaos,"y")[3]));
triangle = {A,B,C};

dtChaos<<GRAPH builder=""></GRAPH>

Re: Random Uniform() keeps giving me the same number

Thanks Xan

Re: Random Uniform() keeps giving me the same number

Thanks for the quick response.  Labels were not important for the simulation so I just turned them off like you suggested and everything is working great.

Re: Random Uniform() keeps giving me the same number

Another work-around is to turn off the Hide Overlapping Labels preference in the Graphs preferences group. That appears to be the source of the inteference with the random stream.

Re: Random Uniform() keeps giving me the same number

(Thanks @EvanMcCorkle  and @danschikore  for puzzling this out before I got in this morning!)

It is a bug in JMP's marker drawing; the easiest way to get your JSL going is to remove the Label state and change it to a color.

Use color rather than labelUse color rather than labelUse color rather than label

The problem is with the code that is positioning the labels around the data points; it needs a repeatable sequence of random numbers to juggle colliding labels, but it isn't keeping the reset to itself...as you noticed.

 

Another approach that keeps the labels needs a workaround in your JSL:

 r = Random Seed State(); // the following statements make the graph update...
 
 newX = current:x;
 newY = current:y;
 column(dtChaos,"X")[1+4]=newX;
 column(dtChaos,"Y")[1+4]=newY;
 wait(2);
 
 Random Seed State(r);

this captures and restores the random state before and after the markers are drawn. The combination of changing a value in the table and the wait triggers the graph to update.

 

Thanks for the test case; a proper fix is underway.

Re: Random Uniform() keeps giving me the same number

I see the issue, don't know the answer yet.

I'll look at it monday morning.

 @EvanMcCorkle