
Help with Manipulate
Posted:
Nov 14, 2013 1:50 AM


Hello
I need to create a simple demonstration based upon an exercise on poisson counting processes. Here is the code
Manipulate[n/Total[z],Style["Poisson Arrival Times",18,Bold],"",Delimiter,{{z,Flatten[{0,RandomVariate[Quiet@ExponentialDistribution[\[Lambda]],n1]}]},Button["random",z=Flatten[{0,RandomVariate[Quiet@ExponentialDistribution[\[Lambda]],n1]}]]&,Appearance>"Labeled"},"",Delimiter,{{\[Lambda],2,"\[Lambda]"},1,100,1,Appearance>"Labeled"},"",Delimiter,{{n,10000,"n"},1,1000000,1000,Appearance>"Labeled"},SaveDefinitions>True]
The idea is to generate a sequence of random numbers, then take the sum of it and keep the last value. Every time I hit "random"a new sequence is created.
The above code returns the following error msg
RandomVariate::array : "\"The array dimensions 1 + n given in position 2 \ of RandomVariate[ExponentialDistribution[=CE=BB], 1 + n] should be a list of \ nonnegative machinesized integers giving the dimensions for the result. \""
and some weird output. After hitting "random", the output is what I expect but the whole Manipulate output is still red indicating that there are problems.
Could you be so kind to point out what I did wrong and how to fix it? I feel that I did not quite get how Manipulate works.
Many thanks
Ed

