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Function Reference: wblplot

statistics: wblplot (data, …)
statistics: handle = wblplot (data, …)
statistics: [handle, param] = wblplot (data)
statistics: [handle, param] = wblplot (data, censor)
statistics: [handle, param] = wblplot (data, censor, freq)
statistics: [handle, param] = wblplot (data, censor, freq, confint)
statistics: [handle, param] = wblplot (data, censor, freq, confint, fancygrid)
statistics: [handle, param] = wblplot (data, censor, freq, confint, fancygrid, showlegend)

Plot a column vector data on a Weibull probability plot using rank regression.

censor: optional parameter is a column vector of same size as data with 1 for right censored data and 0 for exact observation. Pass [] when no censor data are available.

freq: optional vector same size as data with the number of occurences for corresponding data. Pass [] when no frequency data are available.

confint: optional confidence limits for ploting upper and lower confidence bands using beta binomial confidence bounds. If a single value is given this will be used such as LOW = a and HIGH = 1 - a. Pass [] if confidence bounds is not requested.

fancygrid: optional parameter which if set to anything but 1 will turn off the fancy gridlines.

showlegend: optional parameter that when set to zero(0) turns off the legend.

If one output argument is given, a handle for the data marker and plotlines is returned, which can be used for further modification of line and marker style.

If a second output argument is specified, a param vector with scale, shape and correlation factor is returned.

See also: normplot, wblpdf

Source Code: wblplot

Example: 1

  

 x = [16 34 53 75 93 120];
 wblplot (x);
plotted figure

Example: 2

  

 x = [2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67]';
 c = [0 1 0 1 0 1 1 1 0 0 1 0 1 0 1 1 0 1 1]';
 [h, p] = wblplot (x, c);
 p

p =

   82.0192    0.8951    0.9896
plotted figure

Example: 3

  

 x = [16, 34, 53, 75, 93, 120, 150, 191, 240 ,339];
 [h, p] = wblplot (x, [], [], 0.05);
 p
 ## Benchmark Reliasoft eta = 146.2545 beta 1.1973 rho = 0.9999

p =

   146.2545     1.1973     0.9999
plotted figure

Example: 4

  

 x = [46 64 83 105 123 150 150];
 c = [0 0 0 0 0 0 1];
 f = [1 1 1 1 1 1 4];
 wblplot (x, c, f, 0.05);
plotted figure

Example: 5

  

 x = [46 64 83 105 123 150 150];
 c = [0 0 0 0 0 0 1];
 f = [1 1 1 1 1 1 4];
 ## Subtract 30.92 from x to simulate a 3 parameter wbl with gamma = 30.92
 wblplot (x - 30.92, c, f, 0.05);
plotted figure