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Math Help - Normalizing values - currently in histogram format

  1. #1
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    Normalizing values - currently in histogram format

    Hi all,

    I've been told I should normalize the attached graphs. I don't really understand why or what is required.

    Can anyway shed light on what normalizing these would mean please?

    Thanks in advance.Normalizing values - currently in histogram format-normalizing-graphs.png
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  2. #2
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    Re: Normalizing values - currently in histogram format

    I'm not sure what's meant by normalising either. My only suggestion would be, if your bars are not all the same width, then you would need to create a frequency DENSITY histogram, which gives a better picture of what is really happening.
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  3. #3
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    Re: Normalizing values - currently in histogram format

    Hi Prove It,

    Thanks for your answer. So searching this a bit more it seems that normalizing a histogram means I'm creating a PDF?
    If so am I correct in saying I'll take my data in excel and divide the frequency counts by the total number of counts?
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  4. #4
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    Re: Normalizing values - currently in histogram format

    yes, by the total number of occurrences.
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  5. #5
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    Re: Normalizing values - currently in histogram format

    Great thanks

    Related question:

    I have data for three related graphs (increasing the node density) and showing the pdf of the link duration as the node density is increased.

    However when I get the data it comes with the bin and the frequency.
    The problem is the bins used for each of the three node densities are different.

    I need the x axis to be consistent. I think however that by modifying this I am effectively modifying the mean of the graphs.

    Is there someway I can modify all of these (suing something like excel) so they all use the same bins without having access to the raw data?

    Thanks
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