Why does lognpdf not integrate to 1?
조회 수: 2 (최근 30일)
이전 댓글 표시
Hello all,
We know by definition that a pdf must integrate to 1, but I'm finding in my code that this is not the case for a pdf I create using lognpdf and I am wondering why. Can you please help me?
increment = 0.01 ;
x = 0:increment:1 ;
mean_val = 0.25 ;
sigma_val = 0.69 ;
y = lognpdf(x,mean_val,sigma_val) ;
>> trapz(x,y)
ans =
0.358554747437567
You can see that the integral (approximated by the trapezoidal method) is significantly below 1. Why?
댓글 수: 0
채택된 답변
추가 답변 (0개)
참고 항목
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!