
YULCDFName:
with p denoting the shape parameter and denoting the gamma function (HELP GAMMA for details). Dataplot computes the Yule cumulative distribution function using the above sum. The individual terms are computed using the log gamma function. The Yule distribution has increasingly long tails as p goes to zero. Currently, Dataplot limits the Yule pdf function to the case where p >= 0.1.
where <x> is a nonnegative integer number, parameter, or variable; <p> is a positive number, parameter, or variable that specifies the shape parameter; <y> is a variable or a parameter (depending on what <x> is) where the computed Yule cdf value is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = YULCDF(X,P) PLOT YULCDF(X,2) FOR X = 0 1 50
Y1LABEL Probability X1LABEL X LABEL CASE ASIS X1LABEL DISPLACEMENT 12 Y1LABEL DISPLACEMENT 12 MULTIPLOT 2 2 MULTIPLOT CORNER COORDINATES 0 0 100 100 XTIC OFFSET 0.5 0.5 LINE BLANK SPIKE ON TITLE AUTOMATIC X1LABEL X Y1LABEL PROBABILITY TITLE SIZE 3 PLOT YULCDF(X,0.5) FOR X = 0 1 50 PLOT YULCDF(X,1) FOR X = 0 1 50 PLOT YULCDF(X,1.5) FOR X = 0 1 50 PLOT YULCDF(X,2) FOR X = 0 1 50 END OF MULTIPLOT
Date created: 7/7/2004 