
GL2PPFName:
The generalized logistic type 2 percent point function is computed by numerically inverting the cumulative distribution function. The general form of the type 2 generalized logistic cumulative distribution function can be obtained by replacing x in the above formula with (xloc)/scale.
<SUBSET/EXCEPT/FOR qualification> where <p> is a variable, number or parameter; <alpha> is a number or parameter that specifies the value of the shape parameter; <loc> is a number or parameter that specifies the value of the location parameter; <scale> is a number or parameter that specifies the value of the scale parameter; <y> is a variable or a parameter (depending on what <p> is) where the computed generalized logistic type 2 ppf value is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional. The location and scale parameters are optional.
LET X2 = GL2PPF(P1,ALPHA) PLOT GL2PPF(P,ALPHA) FOR P = 0.01 0.01 0.99
LET A = DATA 0.5 1 2 5 MULTIPLOT 2 2 MULTIPLOT CORNER COORDINATES 0 0 100 95 MULTIPLOT SCALE FACTOR 2 LABEL CASE ASIS TITLE CASE ASIS TITLE DISPLACEMENT 2 Y1LABEL X X1LABEL Probability X1LABEL DISPLACEMENT 12 Y1LABEL DISPLACEMENT 15 . LOOP FOR K = 1 1 4 LET ALPHA = A(K) TITLE Alpha = ^ALPHA PLOT GL2PPF(P,ALPHA) FOR P = 0.01 0.01 0.99 END OF LOOP END OF MULTIPLOT CASE ASIS MOVE 50 97 JUSTIFICATION CENTER TEXT Generalized Logistic Type 2 PPF's
Date created: 3/27/2006 