Weibull paper in Excel - how?

[es.rj]

Hi,

I want to create Weibull paper in Excel. The problem is the labelling
at the Y-axis.

I want to label probabilities (between 0.1 and 99.9%), but want to plot
the transformed logaritmic data; calculated out of the probability via
ln(ln(1/(1-p)))

X P (probabiliy, label) Y (transformed data; to
be plotted)
155 97,89% 1,350040182
325 97,61% 1,317875745
500 97,34% 1,288316244
525 97,07% 1,26088904


How can I do this either with or without VBA?

Has minitab this functionality included? Does it calculate beta and
eta?

thanks for the help,
Roger

 

[Harlan Grove]

(e-mail address removed) wrote...

I want to create Weibull paper in Excel. The problem is the labelling
at the Y-axis.

I want to label probabilities (between 0.1 and 99.9%), but want to plot
the transformed logaritmic data; calculated out of the probability via
ln(ln(1/(1-p)))

X P (probabiliy, label) Y (transformed data; to be plotted)
155 97,89% 1,350040182
325 97,61% 1,317875745
500 97,34% 1,288316244
525 97,07% 1,26088904

How can I do this either with or without VBA?

....

Chart both P and Y but use two y-axes with P on the left y-axis, then
set the markers and the lines for the P series to nothing. The P series
won't appear, but its y-axis will. If you don't want to see the Y
series's y-axis labels, disable all its tick marks and set it label
number format to ;;;. If you change the lower and upper bounds for P's
y-axis, you'll need to make corresponding changes to Y's y-axis bounds.

 

[Jon Peltier]

In this example, I've used the normal distribution to generate a custom Y
axis. All you need to do is use your Weibull function. I've done this as
well, but I have no self-contained example.

http://peltiertech.com/Excel/Charts/ProbabilityChart.html

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services - Tutorials and Custom Solutions -
http://PeltierTech.com/
2006 Excel User Conference, 19-21 April, Atlantic City, NJ
http://peltiertech.com/Excel/ExcelUserConf06.html
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