1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Difference between a PDF and a CDF?

  1. Apr 23, 2009 #1
    I'm having a lot of trouble figuring out the difference between a probability density function and a cumulative distribution function.

    Is the CDF just the integral of the PDF?

    Thanks in advance.
  2. jcsd
  3. Apr 23, 2009 #2


    User Avatar
    Science Advisor

    The PDF (probability density function) is the derivative of the CDF (cumulative distribution function). Conversely, the CDF is the integral of the PDF.
  4. Apr 23, 2009 #3
    Alright that's what I thought. Much appreciated! I was freaking out haha.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook