07-15-2014 08:57 AM
Hello all,
I am plotting Weibull data, and am attempting to use the original Weibull graph axes. In a Weibull plot, the percentage of items still functional at a given time t, or the reliability R(t), is plotted versus that time. Here is the problem: the abscissa is the natural log of time, while the ordinate is (get ready) the natural log of the natural log of the reciprocal of item reliability at a given time, i.e. ln(ln(1/R(t))). I understand how to get a log axis, but that clearly is insufficient for the ordinate. Is there any LabVIEW functionality that allows axis transformation, or must I content myself with merely performing the transformation on the data itself, rather than the axis scale? (We are currently doing this, but it removes the sensible reading the transformations provide.)
Thanks for any advice,
Nathan
Solved! Go to Solution.
07-15-2014 09:03 AM - edited 07-15-2014 09:04 AM
You need to transform the data yourself.
(There are several ideas in the ideas exchange that try to address this limitation.)
07-15-2014 01:04 PM - edited 07-15-2014 01:14 PM
Is there any way then to manually construct the axis scale? Spacing, values, etc. Ideally it would look something like the image here: http://images.books24x7.com/bookimages/id_9017/0315.jpg
07-15-2014 01:45 PM
For the most general case, you would need to do everything yourself using a 2D picture indicator.
(Open the example finder and look at the example "XY Multiplit Graph" for some ideas).
07-15-2014 02:03 PM
That's what I was gearing up for. Thanks for the confirmation.