Continuing with Example 54.1, you can specify different bandwidth multipliers that determine the smoothness of the kernel density estimate. The following
statements show kernel density estimates for the variable length
by specifying two different bandwidth multipliers with the BWM= option:
proc kde data=channel; univar length(bwm=2) length(bwm=0.25); run; ods graphics off;
Output 54.2.1 shows an oversmoothed estimate because the bandwidth multiplier is 2. Output 54.2.2 is created by specifying BWM=0.25, so it is an undersmoothed estimate.