Drawing Simple Bar Charts (Stats Question)

This is a discussion on Drawing Simple Bar Charts (Stats Question) within the A Brief History of Cprogramming.com forums, part of the Community Boards category; Hi there, I'm writing a small program to draw bar and pie charts. I have a question regarding weights (or ...

  1. #1
    Code Monkey Davros's Avatar
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    Drawing Simple Bar Charts (Stats Question)

    Hi there,

    I'm writing a small program to draw bar and pie charts. I have a question regarding weights (or frequencies) of values.

    If I have the following data:

    Code:
    VAL   FREQ
    5       1
    2       1
    3       2*
    4       1
    Typically, what do I plot for the bar of the third value?

    Do I plot a single bar of height 6, or two bars of height 3?

    If I were two plot two separate bars, what would I plot if the frequency was a fractional number?

    Thanks
    OS: Windows XP
    Compilers: MinGW (Code::Blocks), BCB 5

    BigAngryDog.com

  2. #2
    Mayor of Awesometown Govtcheez's Avatar
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    > Do I plot a single bar of height 6, or two bars of height 3?

    I'd do 2 of height 3. Having one of height 6 doesn't make much sense

    > If I were two plot two separate bars, what would I plot if the frequency was a fractional number?

    I don't follow.

  3. #3
    Code Monkey Davros's Avatar
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    >I don't follow

    If the third value had a non-integer weight of 2.5, then I can't plot 2 and a half bars.

    Or does my question simply not make sense because no one would ever enter a non-integer weight? In which case, should I simply round to the nearest integer and stop worrying?
    OS: Windows XP
    Compilers: MinGW (Code::Blocks), BCB 5

    BigAngryDog.com

  4. #4
    Mayor of Awesometown Govtcheez's Avatar
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    That's kinda what I meant. Seems it'd be difficult to have a non-integer weight. Even if you did, you could change the proportions so it does.

    IE

    Code:
    VAL   FREQ
    5       1
    2       1
    3       2.5
    4       1
    Code:
    VAL   FREQ
    5       2
    2       2
    3       5
    4       2
    I hate stats, though, so I don't know if this would cause more problems than it solved. You could also put some sort of a note on that, but that's really up to you.

  5. #5
    Code Monkey Davros's Avatar
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    >I hate stats

    They certainly make you think.

    I think I'll split non-unity weights into multiple bars, while rounding to the integer. Unless, of course, someone can suggest why plotting weighted values on the y-axis would be useful. At the moment, I agree that it doesn't seem to make any sense.

    Thenks for replyling Govtcheez. That helped!
    OS: Windows XP
    Compilers: MinGW (Code::Blocks), BCB 5

    BigAngryDog.com

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