Free Microsoft Excel 2013 Quick Reference

Error Bars-standard deviations

Hey guys im trying to use the standard deviations that i have calcualted inorder to put some error bars on a graph that i have made, but its not wokring... please helP! thanks in advance!


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Here is my problem. If I have the below data graphed in a line chart as 3 series (Uninfested, vH9 (com.) and BioL (incom.)), how can I get EXCEL to put error bars (standard deviations are given below in a corresponding position) on my graph. When I try to put the error bars on I can only seem to get the same value for the whole series, whereas each point should have its own error bar value. I hope this is clear.

H+1 H+2 H+3 H+4
Uninfested 2.53 0.68 3.24 5.21 vH9(com.) 3.41 4.91 2.60 9.01 BioL (incom.) 3.61 6.11 3.67 5.30
0.131 0.081 0.323 0.248
0.233 1.169 0.562 0.490
0.360 0.000 0.165 0.413

Generally error bars (standard deviations) vary point-by-point in a graph
depending on the distribution of individual values for each point. Excel can
calculate these separate standard deviations, but there appears to be no way
to display them in a graph. Has anyone found a way around this?

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Generally error bars (standard deviations) vary point-by-point in a graph
depending on the distribution of individual values for each point. Excel can
calculate these separate standard deviations, but there appears to be no way
to display them in a graph. Has anyone found a way around this?

----------------
This post is a suggestion for Microsoft, and Microsoft responds to the
suggestions with the most votes. To vote for this suggestion, click the "I
Agree" button in the message pane. If you do not see the button, follow this
link to open the suggestion in the Microsoft Web-based Newsreader and then
click "I Agree" in the message pane.

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Hiya!

I'm Running Excel 2007 on Vista. Trying to put error bars on a bar chart. Standard error works fine but standard deviation doesn't work - I get a row of bars the same length, hovering way above the top of the data series bars in a straight line. Did all latest updates this morning. Is this incurable Vista weirdness? Anybody experienced this or knows how to fix it??? Cheers!

hey, ive got a bar chart and i want to add an error bar to each bar to reflect its standard deviation. but at the moment excel will only let me change all of the bars so that the error bars are all the same for every bar in my chart. how do i do each one seperately? and which option do i choose so that i can type in the particular standard deviation for a particular bar?
thanks,
emily

I am capturing data in a table and graphing it using excel 2007. I have added vertical error bars to show 2 standard deviation units. This works well, however, as I capture more and more data, the graph becomes cluttered.

How can I create horizontal standard deviation lines that automatically update as the data is entered?

Thanks,

Chris

I've plotted a column chart which has 6 different columns. Each column has a specific name and value for it as well as standard deviation which needs to be represented on the chart. I'm able to plot the columns with the correct labels underneath, but when trying to add the standard deviation error bars, it inserted the same standard deviartion for every column as well as at the same value. Any help with this would be great.

I have a 2-D clustered column chart that shows the mean value of 4 different
samples using chunky blue coloured bars.

What I would also like to do is, on the same graph, show the standard
deviation of each sample on the relevant blue bar, such that a vertical line
is inserted in the middle of each of the blue bars that shows 1 standard
deviation up the way and one standard deviation down the way (i.e. so that it
looks like 2 letter "T"'s, symmetrically above and below each other).

I've not explained that very well but I hope someone knows roughly what I'm
trying to do - its really a typical statistical chart that shows both mean
and standard deviation on the same graph.

I can post an image if this site allows and if it would be useful.

Regards

How do you make each data point have a different standard deviation value for
its error bar?

I have a spreadsheet containing means and standard deviations, and want
to create graphs showing TWO standard deviations as error bars. Working
with one SD is no problem; I just set custom Y error bars to
=DATA_SHEET!$CO$2:$CO$367 (lots of columns, one row per day of year).
But I've had zero sucess in getting two SDs to show. I have 30 columns
of SDs, so I don't want to go building another 30 computed columns if
it can be avoided.

Is there any way at all to do this through the custom Y error bar
formula alone?

Thanks

Robert Smith

In scientific experiments it is often important to conduct an experiment in
triplicate. I find that I often need to plot these on a bar chart eg cell
number with two growth conditions at a variety of different time points. If
you count the cell number in three separate flasks for each growth condition
at each time point, then you can work out the mean cell number and the SEM or
standard deviation. I want to plot both the mean and the SD for each point by
using error bars. Obviously the SD is different for each point. Excel will
not let you do this and it makes me crazy because I have to plot cell counts
for each time point and each condition as a separate series. Why is there no
"vary error bar by point" command like there is for colour???????

Does anyone know of an easier way please?

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suggestions with the most votes. To vote for this suggestion, click the "I
Agree" button in the message pane. If you do not see the button, follow this
link to open the suggestion in the Microsoft Web-based Newsreader and then
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I've an error bar query.

I've calculated the standard error margin (SEM) for each point in my
bar graph - this varies as each point is the average of a varying
number of samples.

This SEM value is represented in the same units as the data on the bar
graph (second), and is in a column that corresponds to the values for
the bars in the bar graph. (i.e. A1 = Bar 1 value, B1 = Bar 1 value
SEM).

When I define the error bar using the 'custom error bars' option in the
'add error bars' tab I select the column (I drag from the top of the SEM
data to the bottom) for the SEM data. However, Excel gives seemingly
spurious error bars when I do this. I'm getting errors of several times
the values according to the error bars, when the actual SEM is equal to
zero, for example.

How do I define the error bars correctly? Is because I am working in
seconds?

I have attached the sheet. The values of the bar chart are in column
AU, and the values of each point's SEM is in column BB.

(You'll also notice the ridiculous formula I came up with for
calculating the SEM! I'm not very good with Excel!)

Thanks for your help,

Adam

+-------------------------------------------------------------------+
|Filename: A Data Compiled.zip |
|Download: http://www.excelforum.com/attachment.php?postid=4975 |
+-------------------------------------------------------------------+

--
A S-D
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A S-D's Profile: http://www.excelforum.com/member.php...o&userid=33227
View this thread: http://www.excelforum.com/showthread...hreadid=558140

Many of the error bar charts (standard deviation) I make end up showing black
triangle figures. Very large ones across the graph. I have googled and there
are other posts concerning such gremlins. None describe a fix. Has anyone had
a problem with this?

I've an error bar query.

I've calculated the standard error margin (SEM) for each point in my bar graph - this varies as each point is the average of a varying number of samples.

This SEM value is represented in the same units as the data on the bar graph (second), and is in a column that corresponds to the values for the bars in the bar graph. (i.e. A1 = Bar 1 value, B1 = Bar 1 value SEM).

When I define the error bar using the 'custom error bars' option in the 'add error bars' tab I select the column (I drag from the top of the SEM data to the bottom) for the SEM data. However, Excel gives seemingly spurious error bars when I do this. I'm getting errors of several times the values according to the error bars, when the actual SEM is equal to zero, for example.

How do I define the error bars correctly? Is because I am working in seconds?

I have attached the sheet. The values of the bar chart are in column AU, and the values of each point's SEM is in column BB.

(You'll also notice the ridiculous formula I came up with for calculating the SEM! I'm not very good with Excel!)

Thanks for your help,

Adam

I've made a bar graph in Excel 2003 with four columns and two columns are clustered together in a series (so there are two series). I want to enter in a separate standard deviation value for each column. When I try that customs option and enter in the values for the first column it automatically adds an error bar of the same values on the second column of the same series. How can I fix that?

Ok, I have column with numbers to equal my X axis then I have 4 different columns with the data for the Y axis. I need to find the standard deviation of the 1st two columns and the standard deviation of the 2nd two columns. Then i need to graph it so only two lines show up. and then i need to put on error bars. how would i do this? any help would be much appriciated.

Hi all,

I want to make a bar chart using the data average as a single bar of data (a single value) and then use a different value to display the standard deviation as an error (both + and -) overlapping the same bar (the average). How do I do this in excel 2007?

thanks ,

rob

In scientific experiments it is often important to conduct an experiment in
triplicate. I find that I often need to plot these on a bar chart eg cell
number with two growth conditions at a variety of different time points. If
you count the cell number in three separate flasks for each growth condition
at each time point, then you can work out the mean cell number and the SEM or
standard deviation. I want to plot both the mean and the SD for each point by
using error bars. Obviously the SD is different for each point. Excel will
not let you do this and it makes me crazy because I have to plot cell counts
for each time point and each condition as a separate series. Why is there no
"vary error bar by point" command like there is for colour???????

Does anyone know of an easier way please?

----------------
This post is a suggestion for Microsoft, and Microsoft responds to the
suggestions with the most votes. To vote for this suggestion, click the "I
Agree" button in the message pane. If you do not see the button, follow this
link to open the suggestion in the Microsoft Web-based Newsreader and then
click "I Agree" in the message pane.

http://www.microsoft.com/office/comm...excel.charting

I am trying to plot minimum and maximum lines on a polynomial scatter band within excel. I am able to plot the mean line ok but there doesn’t appear to be an option to actually plot a given 1.65 standard deviation above and below the line. There is an error bar and standard deviation function but it doesn’t actually plot these lines.

The Y-axis on my graph needs to be a logarithmic scale.

Does anyone know if this can be done in excel?

Regards

I have data points that are the averages of several individual pieces of data. I want to display the mean value with positive and negative standard deviation that describe the numbers that make up that mean. There are a total of five of these mean values that I need to show.

I've attached both an Excel file with the data, and a .jpg file that I generated with SigmaPlot showing how it should look. Each error bar is individual to the bar that it's associated with (values in the Excel file).

Does anyone know how to enter individual standard deviation values for each data point in Excel 2007? I could just use SigmaPlot to do all of the graphs, but that program is much slower to use, and the graphs are very ugly; since I need many of these graphs for a presentation, it's important that they look uniform and nice.

Thanks so much in advance.

I cannot seem to get custom error bars to work on charts in excel 2007. I
have a set of data, eight numerical y values, and each one has a different
standard deviation. I plot a histogram and use custom error bars selecting
+/- my deviations from the worksheet (which are approx 10% of numerical value
so easy to see) and then click ok but nothing appears on my chart just two
circles (doing the same in excel 2003 works fine, I see them fine). If I
create the error bars in excel 2003 and open them in 2007 they appear and
when I go into custom error bars the correct worksheet cells appear, however
if I click ok they dissapear (clicking cancel they remain). Its infuriating!
Any suggestions?

Hi All,

I have the following table

day Night
Mean 159.44 161.07
SD 1.58 1.84

The second raw is the mean value and the third is the standard
deviation of some data in day and night. I used Column Chart to Show
the differences between the Mean value of results in Day and Night. I
wanted to use the standard deviation for the Y-Error bar. But when I
try to do that, I can only assign on of the Sd(1.58 or 1.84) for both
of the column. I wonder to know if it is possible to assign different
SD for different Column.

Thanks,

In Excel can I format one data series with custom plus and minus standard
deviation error bars and custom colors and then have the chart use that as
the default? I couln't use a format painter to do.

I am working with two graphs (QI.xls)

my main question is, how does one add different standard dev bars on 2D bar graphs?

looking at my excel sheet, the tab (Grapth_Theme_Year) is based on the tab (datatable).
If you noticed in datatable tab, 2008 and 2009 has different SD. How do I add that in Excel 2007? I found the add error bar tab in the menu, but it seems that I can only add one constant value for both bars (so if it's 2, it would be 2008 +- 2 and 2009 +- 2.. instead of it should be 2008 +-1 and 2009 +-2).

Secondly, I would like to add additional information for the datatable under the Grapth_Theme_Year's graph. So i would like the table to show the SD, low and high values that is listed under the datatable tab. how does one do this?

The other graph, I would like to just add the error bar to the last (red) bar.

I basically want my graphs to look like the one in the sample.xls file. This graph was copied from a powerpoint slide over to excel. Sadly, it was pasted into the powerpoint as a picture, so I can't figure out how they did it. So as you notice in the sample.xls file, the bar graph is graphing the value, there is a different stand dev error bar for each bar graph and the datatable has extra elements that was not in the graph (best in class, low, mean). That is what basically what I want for my data. How does one do this in Excel 2007?


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