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Probablity plot
sharoden Feb 12, 2001 12:00 AM (in response to Anganitdisabled)For such a range of failure rates, you may want to consider a log plot of the failure rates, i.e., plot time on the xaxis in the normal linear fashion, and plot the log(base 10) of the failure rate or cumulative failure rate (written as either a discrete summation of failures with sigma or an integral if you have established a function of the failure rate as a function of time).
If this doesn't help, post a sample of your data and it can easily be demonstrated. Hope this helps.
Probablity plot
Anganitdisabled Feb 15, 2001 12:00 AM (in response to sharoden)Sharoden,
Thanks for reply. In a data form what I have ist50 {time for cumulative 50% of fails(say 5000 hrs.)}, and, sigma=0.45(say). I want to plot a Weibull plot {ie., cumulative %fails(from 0.0001% to 99.99%) vs. time (from 10hrs. to 1E5 hrs.)is it possible to do this in mathcad or Axum6?
Thanks,
Anganit.
Probablity plot
FredKohlhepp Feb 19, 2001 12:00 AM (in response to Anganitdisabled)MathCad 8 lists four functions:
dweibull(x,s)
pweibull(x,s)
qweibull(p,s)
rweibull(m,s)
Information in the manual is scarce; I expect that there are quick sheets on the subject.
Fred Kohlhepp
fkohlhepp@sikorsky.com

