Results 1 to 6 of 6

Math Help - How to draw standard deviation in a plot.

  1. #1
    Junior Member
    Joined
    Jun 2010
    Posts
    59

    How to draw standard deviation in a plot.

    Hello,
    I have run 10 different experiments. In each of these ten experiments only the value X of one parameter is changed.

    What I would like to do is to plot the mean values of these experiments in the same plot.

    The x value is for the X variable that is changed every time. What I would like to show is: how the changes of variable X affect the mean value of the ten different experiments.

    So I have just to put some marks which is easy. What I would like also to do is to plot somehow to the mean values their standard deviations. So could you please how I can do that? How to add std close to the mean?

    I would like to thank you in advance for your help.

    Best Regards
    Alex.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by dervast View Post
    Hello,
    I have run 10 different experiments. In each of these ten experiments only the value X of one parameter is changed.

    What I would like to do is to plot the mean values of these experiments in the same plot.

    The x value is for the X variable that is changed every time. What I would like to show is: how the changes of variable X affect the mean value of the ten different experiments.

    So I have just to put some marks which is easy. What I would like also to do is to plot somehow to the mean values their standard deviations. So could you please how I can do that? How to add std close to the mean?

    I would like to thank you in advance for your help.

    Best Regards
    Alex.
    Box and Whisker plot?
    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Jun 2010
    Posts
    59
    Quote Originally Posted by CaptainBlack View Post
    Box and Whisker plot?
    CB
    Thanks a lot!
    So, This is what I have to do
    http://en.wikipedia.org/wiki/File:Boxplot_vs_PDF.png

    Is that right?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by dervast View Post
    Thanks a lot!
    So, This is what I have to do
    File:Boxplot vs PDF.png - Wikipedia, the free encyclopedia

    Is that right?
    It is not quite what you asked for as it shows quartiles rather than standard deviations, but I think it does the sort of thing you asked for.

    CB
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Jun 2010
    Posts
    59
    Quote Originally Posted by CaptainBlack View Post
    It is not quite what you asked for as it shows quartiles rather than standard deviations, but I think it does the sort of thing you asked for.

    CB
    Thanks a lot! But how to put std then? Std relates somehows to quartiles so if i calculate the quartiles probably is not that good but still is something.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by dervast View Post
    Thanks a lot! But how to put std then? Std relates somehows to quartiles so if i calculate the quartiles probably is not that good but still is something.
    If you really want SD's in the plot instead of the quartiles use +/-1 and 2 SD's (but lable the plot so people know what you have done).

    (There are good reasons for prefering the quartiles - they are less effected by outliers than the SD).

    CB
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: January 22nd 2011, 01:07 AM
  2. Plot a standard deviation chart
    Posted in the Statistics Forum
    Replies: 1
    Last Post: October 11th 2010, 02:19 AM
  3. Replies: 0
    Last Post: November 22nd 2009, 08:30 PM
  4. Replies: 5
    Last Post: May 18th 2009, 05:14 AM
  5. how to draw an angle in standard form?
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: May 19th 2008, 06:54 AM

Search Tags


/mathhelpforum @mathhelpforum