Error bar

How can I add error bars in Interactive Chart?

Thank you very much. Sorry for not explaining enough.
I calculated errors and added error bars in Basic Charting as follows.
But I couldn't add error bars in Interactive Chart.
What should I do next?

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How can I display different error bars for each point on a scatter graph?

I have a scatter chart in Numbers and I need to add error bars to the points along both the x and y axes, however, the size of the error bars for each point need to be of different sizes. Is there a way to accomplish this or is there some kind of work around to acheieve a similar result? So far the only way I can find to add error bars only allows a standard amount for each point.

I found the answer here https://discussions.apple.com/message/16440653#16441393

Scatter Chart Error Bars Help

I'm new to using iWork for my lab reports and today, while I was plotting a scatter chart, I had to put some error bars on the points in percentage form. The value for the x-axis was 0.5% and the value for they y-axis was 1.5%, and when I tried to input these, the only thing I got was the error sound and the error bars returning to 3% and 1% respectively. Anyone know why this is happening and how i might resolve this issue? Thank you in advance.

Angelos,
I'm sure that your eyes are sharper than mine. Still, if your error bar is shorter than the radius of your symbol, you aren't going to see it. The standard symbols are roughly 4mm in diameter, based on the Numbers Rulers. Let's say you have a 100 mm tall chart, an average graphic size. A 0.5% error bar would be a maximum of 0.5 mm in length, unless you suppress the axis zero, and would be hidden behind the 4 mm dia. data symbol. Yes, you could see a 3% or 4% error bar, but I'm not sure everyone would recognize that it was an error bar and not part of the data symbol.
Regards,
Jerry

XY Graph, 2D Error Bar, Legend, Multi Plot Help? Please modify the VI

PLEASE READ THE ENTIRE POST and HELP!
Please help with this VI and make it an instructive example for me and other novices like me who come across this typical example.
A typical problem in plotting data is as follows: On the SAME plot (Y-axis = Amplitude vs. X-axis = Time), plot the curves Amp1, Amp2, Amp3, ... coming from sample1, sample2, sample3, ...
Furthermore, there is Error1, Error2, Error3, ... associated with Amp1, Amp2, Amp3,...., which also needs to be plotted. In order to distinguish between these curves, one may use different
colors and show a legend that reads Amp1 (say black), Amp2 (say red), and Amp3 (say green). The plot then becomes complete and conveys data very conveniently.
The attached VI makes an attempt to plot Amp1 and Amp2 using XY Graph and also 2D Error Bar plot (to show error bars). There is one slight problem. The legend does not show what it is supposed
to show. Can someone fix this? If I plot two curves, the legend should show Amp1 and Amp2, if I plot three curves, the legend should show Amp1, Amp2, Amp3, and so on.
I don't want to see the default Plot 0, Plot 1, or whatever. Also, it would be nice to dynamically control the symbol, color, curve style etc, as we keep adding more and more curves to the plot.
Once this problem is fixed, I know I can easily extend it to make it plot more than just two curves in a dynamic way. I could use for loops with shift registers, etc to plot any number of curves on a single plot.
Believe me, I have searched for other posts and cannot find a simple example like the one I have posted here. Many examples I found have confused me more than helped me.
I believe that if this problem is solved in a simple way, many others will find this example very instructive. So by helping me, you help many other people as well!
Thank you in advance. Please see the attached files (the VI, and an example data file that I just created)
Solved!
Go to Solution.
Attachments:
Multi_Plot_Legend_Error_Bar.vi ‏24 KB
data.txt ‏2 KB

Some members have pointed out that this problem has already been resolved (see the link below).
http://forums.ni.com/t5/LabVIEW/Dinamically-handle-legend-names-using-property-nodes/td-p/1479572
I did verify that this works for XY Graph, but not for 2D Error Plot.
I need both legend and error bars. Shame on LabVIEW for not making such a basic plotting requirement easy and trasparent.
There are many clever people who can find work arounds, but that is a not a correct approach.

Error bars in Numbers for iPad?

Greetings,
One of the reasons I purchased an iPad was to work on the go. For me this means being able to create/edit docs, spreadsheets, and presentations in my iPad and then sync that work with my MBP at work.
I am finding some roadblocks when sharing work between devices (a first for me with Apple).
This specific question has to do with Numbers for the iPad:
- Is there a way to add error bars within Numbers for the iPad?
When I try to import a spreadsheet from Numbers in my computer the error bars get cropped as if they were some unnecessarily fancy font that didn't make it to the iPad version of the software. If there is no way to do this, does anyone know if there are plans to add this capability to the program?
I might be biased, but I have a hard time coming up with occasions when one would not need to add a measure of variability (error bar) to any graphic dispplay of data (save for ninth grade presentations maybe).
Thank you for your assistance!
Andres

Hi Andres,
iWork for iOS applications are in version 1, and in general provide a subset of the features of the Mac OS versions. Few of the users in this (Numbers) community are familiar with the iPad version, which probably explains the lack of response to yur question in the nine hours since you posted.
I expect you'll get a quicker (and more useful) response if you repost in the iWork for iOS area: https://discussions.apple.com/community/app_store/iwork_for_ios?view=discussions
Regards,
Barry

Error Bars in WAD Chart

All:
Can anyone tell me if it's possible to add Y Error Bars to a chart in the Web Application Designer v3.5? I'm able to add a trendline to the data series, but do not see an option for error bars.
Thanks in advance...
KB

Did you have get this issue resolved or answered?

Error bars in illustrator

help!! I need to insert the standard deviation in a column graph created in illustrator...how can i do this?

Plot the upper bound and lower bound error points as data sets in a line graph and then connect the dots. Once errors bars are drawn in, remove the upper and lower bound data sets.
L

Error bars in keynote

Does anyone know how to manually insert individual error bars in a bar chart in keynote? the custom option is greyed out in keynote and when I tried it in Numbers I could only use the same value for all the columns rather than specify for each.
Cheers

Thanks for your reply; if this is the case then I must admit to being slightly disappointed. From looking at the Keynote tutorials I am aware that Keynote is not intended as an application through which to present scientific data, but because Apple usually include so many more useful features in their applications than Microsoft do (in my opinion), I thought they may have given us the option to add error bars to graphs and charts.

Error bars in Charts?

Hello everyone- Would anyone know how to create error bars in charts in Keynote 3? I can't seem to find an answer anywhere to this question. Many thanks to future replies...
Powerbook G4 Mac OS X (10.4.6)

You can't get Keynote charts to generate error bars, or to use error bar information from some other source -- that functionality just isn't available in natively-produced Keynote charts.
However, charts that are copied from Excel and pasted into Keynote look quite good. You won't get all the cool textures, or 3D effects that you can with Keynote charts (and not having the latter is a good thing in my book). But, if you set the background of the chart to "None" from within Excel, the chart background will be transparent in Keynote, and you can do things like apply shadows that will conform to the chart elements. Any formatting that you do in Excel should be respected by Keynote.

Legend, error bars, 2nd y axis etc

Hello all,
Measurement Studio is a powerful program. But it's graphing functions need improvement. As a scientific tool, for example, the lack of plotting error bars in CWGraph is unforgivable. And many other essential functions for producing decent graphs are missing. So I attempted to try to fill in some gaps. The attached program intends to do following:
1) Plots x- and y error bars.
2) Legends for data sets,
3) Graph saving,
4) Graph printing
Notes:
1)Error bars are not plotted symmetrically. They can be improved.
2)Legends can be improved by making them automatically located in the empty part of the plotting area. And the routine doesn't work well for the logarithmic scale.
3)Since the point sizes are tied to line size, it is impossible to use larger symbols without increasing the size of the lines!
4)y axis and the 2nd axis labels as rotated have terrible looking fonts.
5)When printing to a pdf file, filename can be automatically set to a default filename so that a dialog box can be avoided.
I hope the attached program is useful.
Sincerely,
Cem
P.S.
The program plots 5 data sets. 4 of which use left y-axis, the last one uses the right axis. Only y error bars are plotted. (x error bars optional). The legend text appears on the left upper corner. User can enable/disable legend, lines connecting data points, error bars, and grid lines. When log axis is chosen, the legend placement is screwed up.
Attachments:
plottest.zip ‏6 KB

Thanks for sharing this with us Girit. I'm sure this will help out alot of people on the forum.
For your legend, this document provides another way you might be able to create a legend and not have to deal with finding an empty place on the graph.
Thanks again
Bilal Durrani
NI

How to put std dev error bars in a chart

Page 141 of the Keynote User Guide states that error bars can be shown on plotted series data. Can anyone get this to work as expected with standard deviation bars for each plotted mean value? I spoke with an Apple Tech Rep today who supposedly knows Keynote well, but he could not get std dev error bars to display properly on a line chart.
Numbers has the same instructions as Keynote and seems to be designed to work the same way.

"Properly" means placing the error bars around the mean values for each data point in a series. In my case, the x-axis is time in minutes and the y-axis is concentration of a chemical.

Linked charts: Error bars are not updated

Linked charts work well: Changed values for bar graph and line graph y values in Numbers are reflected in Keynote and Numbers after “updating”. However, I cannot get error bars to be updated as well. They just keep the values they had when I first paste a graph into Keynote or Pages.
Is this a bug, or am I missing something?

It seems that you missed something.
In the Pages User Guide we may read:
*+Updating a Chart Copied from a Numbers Document+*
+If you’ve created a chart in Numbers, you can copy it and paste it into your Pages document. After it’s been pasted into Pages, the chart remains linked to the data tables it references in Numbers. To change the chart data, open the original Numbers document and edit the data there, save the Numbers document, and then refresh the chart data in Pages.+
+To update a chart after you’ve updated its linked Numbers table:+
+• Select the chart on the page and click the Refresh button that appears.+
+Note: You must save the Numbers document before copying and pasting your chart into your Pages document and after editing the Numbers data tables that the chart references.+
+page 220 Chapter 10 Creating Charts from Numerical Data+
Yvan KOENIG (from FRANCE lundi 12 janvier 2009 16:18:08)

Standard Error Bars in charts

I would like to know if anyone has used std. error bars (as
in statistics) in column or bar charts and how that was
accomplished. I didn't see anything about it in the flex
docs.

Frustrating that these aren't included by default, isn't
it...
I'm sure the questioner long since has solved his problem or
given up, but since I've been unable to find any solutions myself
and have had to reinvent the wheel, I'll try and point anyone else
looking in the right direction.
One way to do it is to create your own IDataRenderer (or
extend or facade an existing one). You'll want to make sure you're
passing a standard deviation as part of your series data and then
in the updateDisplayList method draw it yourself, grabbing the
deviation from the data.item. You'll need to scale it
appropriately... for instance, extend CircleItemRenderer and add an
updateDisplayList along the lines of:
override protected function
updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number):void
super.updateDisplayList(unscaledWidth, unscaledHeight);
if (data.hasOwnProperty('item') &&
data.item.hasOwnProperty('deviation')) {
// figure out the scale (I'm certain there must be a more
appropriate way to do this)
var scale:Number = data.y / data.item.value;
var deviation:Number = data.item.deviation as Number;
var g:Graphics = graphics;
var stroke:IStroke= new
Stroke(0,1,1,false,'normal','square');
stroke.apply(g);
// figure out the center
var trueX:Number = unscaledWidth / 2 - .5; // otherwise
seems to be off to the side, for me
var trueY:Number = unscaledHeight / 2;
// draw the error bar
g.moveTo(trueX,-(deviation * scale) + trueY);
g.lineTo(trueX,(deviation * scale) + trueY);
g.moveTo(trueX, trueY);
// draw little T's on the end of the error bar
g.moveTo(trueX -2, -(deviation * scale) + trueY);
g.lineTo(trueX +2, -(deviation * scale) + trueY);
g.moveTo(trueX -2, (deviation * scale) + trueY);
g.lineTo(trueX +2, (deviation * scale) + trueY);
From there you should be able to futz with it to make it look
pretty.
Hope someone finds this helpful.

Standard Error Bar

I'm exploring Flex as a candidate to use for developing a web application that displays many graphs. The data displayed on the graphs are discreate values with associated stardar errors. I need to display the standard errors as an error bar - similar to how MS Excel displays error bars. Can anyone tell me if this can be done with Flex?

V,
Numbers does the best it can with the information you give it. If you ask for Error Bars, Numbers will calculate the standard deviation for the series and assign that calculation result to each of the bars in the series.
If each of your values represents some statistic that in itself is accompanied by a standard error, that's another thing, but Numbers doesn't know what the error values are unless you tell it. The way to tell Numbers what the error bar values should be in these special cases is to use Custom values.
Here's an example:
I like to use the Scatter Chart, but you will find similar controls for the bar chart.
Jerry

Creating error bars on numbers 09

I'm new to Numbers and I'm trying to draw error bars on my scatter graph.
To draw the graph, I clicked on the chart button, chose scatter graph and just altered the info in a table that popped up to make my chart.
To draw error bars, I went to the chart inspector and clicked on the series tab. I know I need to click on the Advanced button but I can't click it and the data section is empty. I can't click on that either and I can't figure out what I'm doing wrong.

To select a series, first click on the chart then click on a bar/line/data point of the series for which you want the error bars. Actually, turns out you don't have to select the data series anyway. Sorry for the misinformation.
I do not know why you can't select error bars. I'll have to play around some and see if I can get it into that state.

Cannot define error bars for individual bars, has to be whole series

I am trying to make a simple graph that plots the mean and a standard deviation. (see picture in the link) I want to assign an individual mean values for each bar (i am able to do this), and an individual standard deviation for each bar (I cannot do this).
If I set one bar's standard deviation (custom), it also assigns the SAME standard deviation value for every bar in that series (all the green bars get the same SD value, not just the first one). I have 4 bars that I want different standard deviations assigned to (2 greens and 2 yellow = 4 different means, 4 different SDs). The standard deviations are listed in the lower table.
I can't do this. This is a fatal flaw in the software, and again, forces me to use a different application. Please tell me I'm doing something wrong! I love Numbers!
Photo:
http://web.me.com/toddknutson/errorbars2.png
Please help if you can! Thanks!
Todd

I solved my own problem!!
If you want to set different error bar values for every bar in your graph:
-choose custom error bars (positive and negative)
-then delete the placeholder value that apple provides (usually 10)
-highlight MULTIPLE values in a table (these are the values you wish to have as error bars)
-bingo!
See picture!
http://web.me.com/toddknutson/errorbars3.png

Error bar

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