Adding standard deviation bars to graphs

I have composed a bar graph on numbers, and have already calculated the standard deviation of my data. How do I add the standard deviation lines to each bar on my graph? Thank you.

Details available in *_Numbers User Guide_*, page #148 in the English version.
Yvan KOENIG (VALLAURIS, France) lundi 6 décembre 2010 16:44:20

Similar Messages

Standard deviation bars in pages graph

I am trying to input SDs in my graph for my control and experiment. The SDs are in the 10e-5 range. I chose postive/negative but cannot enter a value less than one for the SD. In addition I have two extra SD bars on my graph.

Could you post a screen shot of your Table and your Chart? It's difficult to answer without any context.
Jerry

Standard deviation in graph (bar chart)

Dear Community,
I am looking for a solution for my measurement analysis software, programmed in LabVIEW 8.5:
I have an array (1D, double) with some data. This data is shown in an graph as a bar chart (attachment 1 & 2).
Aditionally, there is an other array (also 1D, double) with the standard deviation of my data in the upper array (both calculated via standard deviation and variance VI)
How can I integrate this standard deviation in my graph to be shown as (colored) error bars (attachment 3)
Thanks for your help!
Best regards,
Iwo
Attachments:
Graph_in_vi.jpg ‏38 KB
Bar_chart_without_std_dev.jpg ‏853 KB
Bar_chart_std_dev.jpg ‏54 KB

Dear lwo,
You can add two more channels.
One with mittelwert+standardabweichung/2
and one with mittelwert-standardabweichung/2 .
Then configure them to show only symbols and no line.
Color them red and choose a cross as symbol.
Be sure, the mittelwert channel is the first one in the array,
or the bars will hide the crosses.
Best regards,
Stefan Heinzl
Message Edited by Stefan Heinzl on 03-09-2009 09:56 AM
Attachments:
Block Diagram.jpg ‏17 KB
Front Panel.jpg ‏40 KB

Standard Deviation in Graph

Does anyone know how insert standard deviation into a bar graph??
Thanks.

Ah. The key point that I was missing was that this works (for points or bars) only when the series is selected in the graph. Otherwise the boxes are not enabled.
See also http://discussions.apple.com/thread.jspa?messageID=9256703 for related info.

Display of standard deviation in graphs

Hello,
I am trying desperately to find out how to present standard deviation within adobe illustrator generated graphs. Can anyone please help me with this problem?
p.s
I am using adobe-illustrator CS2 and winXP
tnx

Dear lwo,
You can add two more channels.
One with mittelwert+standardabweichung/2
and one with mittelwert-standardabweichung/2 .
Then configure them to show only symbols and no line.
Color them red and choose a cross as symbol.
Be sure, the mittelwert channel is the first one in the array,
or the bars will hide the crosses.
Best regards,
Stefan Heinzl
Message Edited by Stefan Heinzl on 03-09-2009 09:56 AM
Attachments:
Block Diagram.jpg ‏17 KB
Front Panel.jpg ‏40 KB

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

Standard Deviation

I was wondering how you get the standard deviation to show up on the graph. I know where the button is to activate the standard deviation for a simple bar chart, however it doesn't show the actual deviation, it gave me uniform for each bar in the chart. How can I fix this? Also I know that the standard deviation isn't the same because I have seen what the chart I am making is supposed to look like.

cgord wrote:
... I know that the standard deviation isn't the same because I have seen what the chart I am making is supposed to look like.
cgord,
The problem is that Numbers doesn't know what your chart is supposed to look like. It's doing the best it can. There is no such thing as a standard deviation for a single point. Numbers considers that your series is a data set and calculates a mean and standard deviation for the set. It then applies this mean and deviation to the error bars, in a proper way, the same for each member of the set.
If your data set is actually a collection of dataset averages, each with a standard deviation of its own, then it might be appropriate to show each bar with it's own custom error bar, calculated elsewhere.
To make this work, you would display each bar's corresponding StdDev in the same row as the mean you are charting and then you would indicate to Numbers which column this custom error bar data is located.
Hope this helps.
Jerry

I need to chart a standard deviation of a moving average in Numbers

In order to complete my statistical analysis of a large ammount of performance data- I was to graph a +/- 2 standard deviation of a moving average AS A SHADED region on my charts. I tried to do this today for Four hours. HELP! PLEASE and thank you SO Much!

You stated:
I have the above charted with the $ values of gains
BUT IT LOOKS LIKE THIS. "
implying it is not correct. Since I don't understand what you are trying to do in general terms I don't know what the problem is.
Can you post some of the data (at least the set you are showing) so we have something to work with?
I made a graph like this:
But since I don't really understand what you want I don't know if this is correct or not.
Wayne

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.

Syncronized scroll bar on graphs

Hi together,
I have a program with several graphs. Is it possible to syncronize the graphs so that all graphs scroll if I scroll on the scroll bar of on graph? I remeber that this is at least possible in LabView...
Cheers

As an alternative to Wolfgang solution, you can add your own scrollbar to the graphs using the scrollbar instrument driver, located in \toolslib\custctrl folder in your CVI installation. Look at the sample program in samples\userint\custctrl\scrollbar folder.
Adding a scrollbar to each graph and handling scrolling events from the controls you can syncronize your graphs. This of course once the graph has been zoomed so that only part of the plots are visible.
This is what CVI can offer for graphs. If you are usnig stripcharts, instead, then you can have a scrollbar shown when they are paused. In this moment, the chart callback should receive EVENT_HSCROLL events when the user operates on the scrollbar. In this moment you can probably get the X-axis scale and apply the same to the other charts. It is to be tested, though: I have nevere tried such a mechanism.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Remove shades behind lines and bars in Graphs

Hello there, new here on the forum.
I'm using obiee 11.
Is there a way to remove the grey shades behind lines and bars in graphs?
Both curious to know wether that's possible in one graph or make it standard for all graphs.
Thanx!

Try this
Removing drop-shadow effect on graphs
By default, whenever a chart is created, there is a drop-shadow effect on it. This property makes it difficult to read some of the
charts. In order to turn it off this property, edit the file dvt-graph-skin.xml from the following location on your
installation.
\InstallHome\Oracle_BI1\bifoundation\web\msgdb\s_blafp\viewui\chart
Edit the <Graph> tag, add the attribute visualEffects="NONE". (Do not remove the rest of the contents in the file). After
editing, the contents should look like this.
<Graph visualEffects="NONE">
<SliceLabel>

<ViewFormat decimalDigit="2" decimalDigitUsed="false"/>
</SliceLabel>
</Graph>
Save the file.
Richard Chan
Rittman Mead Oceania

Is there a way to find a rolling standard deviation?

Hello,
I am currently taking a large amount of data points, and recording 1 out of every 1000 points to a spreadsheet, and saving the latest 1000 points taken to record to a spreadsheet when the program has finished. I would like to be able to know the overall standard deviation of all the points (approximately 36000000 data points, of which I will only record 36000), but I will not be saving all the data points. Is there a way to approximate the standard deviation (of all the points, not just the ones I record)?
I know that I can find the exact mean by continuously summing and then dividing by the number of points taken. I also know that if the mean remains constant, I can start with a standard deviation, find the sum of the residuals squared, and add the new residual for each data point. The problem is that the mean is changing, so each time a new data point is added, the residuals for all the earlier points are also changed.
I'm sorry if this is more of a math problem than a coding issue, but I thought perhaps there would be a way to approximate it in LabVIEW.
Thanks
Solved!
Go to Solution.

Broken Arrow wrote:
What about the Point by Point SD VI?
Well, that's exactly what the OP did not want...
(quote: I would like to be able to know the overall standard deviation of all the points (approximately 36000000 data points, of which I will only record 36000), but I will not be saving all the data points. Is there a way to approximate the standard deviation (of all the points, not just the ones I record)?)
However, you can use the standard_deviation_ptbypt to get the global value without much memory impact by setting the sample lenght to zero.
Of course my example can be futher simplified as attached. (The earlier version was a verbatim translation of the article). Modify as needed. I also added the ptbypt version. You can look at the code of the ptbypt version, it's quite similar (look for the "infinite horizon" case). Personally, I prefer to use a size=3 array instead of multiple scalar shift registers.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
RunningSD1.vi ‏31 KB

Standard deviation in VaR

Dear SAP people,
how do the system calculate the standard deviation in VaR with
historical simulation assuming normal distribution?
In the documentation I can read: "the standard deviation is determined
using a statistical estimation".
Can you give me further information about the statistical procedure
used?
Gianmaria Basile

Dear lwo,
You can add two more channels.
One with mittelwert+standardabweichung/2
and one with mittelwert-standardabweichung/2 .
Then configure them to show only symbols and no line.
Color them red and choose a cross as symbol.
Be sure, the mittelwert channel is the first one in the array,
or the bars will hide the crosses.
Best regards,
Stefan Heinzl
Message Edited by Stefan Heinzl on 03-09-2009 09:56 AM
Attachments:
Block Diagram.jpg ‏17 KB
Front Panel.jpg ‏40 KB

Standard Deviation in iOS Numbers

Hi! I want to know how to find standard deviation in numbers on iOS.

Dear lwo,
You can add two more channels.
One with mittelwert+standardabweichung/2
and one with mittelwert-standardabweichung/2 .
Then configure them to show only symbols and no line.
Color them red and choose a cross as symbol.
Be sure, the mittelwert channel is the first one in the array,
or the bars will hide the crosses.
Best regards,
Stefan Heinzl
Message Edited by Stefan Heinzl on 03-09-2009 09:56 AM
Attachments:
Block Diagram.jpg ‏17 KB
Front Panel.jpg ‏40 KB

Reg.Standard Deviation

Hi,
I am having following scnario of limits for the MICs
Char Lower Limit Upper Limit s/d-0.02
C 0.08 0.12
in the result recording if the user enters more than the specification system should check with standard deviation and valuation should happen according to standard deviation.
which field i have to use in the quantitative tab,how to solve this.
this varies material to material.
Regards,
Selva.

Hi Selva,
You can use following functionality, which may serve your purpose.
Variable Inspection
Use
In a variable inspection, you must specify at least one tolerance limit in the inspection plan for the quantitative characteristic in question. ISO 3951 serves as a standard for a variable inspection. The Quality Management application component has two valuation procedures for variable inspections:
S-method, single-sided tolerance range
S-method, double-sided tolerance range
When you perform a variable inspection according to the s-method for normally distributed characteristic values, the sample size, mean value (x-bar), and standard deviation (s) of the characteristic values are required as inspection results. Depending on the recording form used, you either enter the statistics, or the system calculates them from the single values.
Depending on whether there is an upper specification value (USL) or a lower specification value (LSL) for the characteristic values, the inspection characteristic is rejected if the following conditions are met:
Mean > USL - k * s
or
Mean < LSL + k * s
The value k is the acceptance factor defined in the sampling plan. The mean value and standard deviation must be known.
If the tolerance range is limited on both sides (double-sided), there are two variants for conducting the s-method valuation. You define which variant is used in the function module for the valuation rule. The variants differ in their acceptance range.
When the s-method uses the double-sided tolerance range, both limits of the tolerance range are treated together. The share above the tolerance range and the share below are estimated and compared with a critical value that is calculated from the sample size and acceptance factor. This form of variable inspection leads to the same decision as the graphical procedure described in the ISO 3951 standard (see the figure below). Given the same sampling plan, the acceptance range is smaller than for the variant of the s-method in which the two limit values are handled separately. In this case, the upper and lower specification values are checked separately. The characteristic is rejected when one of the two rejection conditions is met.
Regards
Suhas

Adding standard deviation bars to graphs

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