I want to combine a histogram with an xy graph, but the only
possibilities are either to combine a bar-graph with a line graph or to
combine an xy-graph with y-error bars.

Neither is very good for my purpose, but the latter is the least bad,
and I try to improve by chosing the thickest possible line for the
error bar. I wonder if it were possible to make those errorbars even
broader - perhaps as broad as a histogram bar?

NSV


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NSV -

You may get more assistance if you explain what the end result should look
like.

It is quite possible to combine a Column chart type (vertical bars usually
used for a histogram) with an XY (Scatter) chart type. An example is the
Better Histogram available at www.treeplan.com, where the XY (Scatter) is
used to label the horizontal axis.

- Mike
www.mikemiddleton.com

"nsv" wrote in message
...

I want to combine a histogram with an xy graph, but the only
possibilities are either to combine a bar-graph with a line graph or to
combine an xy-graph with y-error bars.

Neither is very good for my purpose, but the latter is the least bad,
and I try to improve by chosing the thickest possible line for the
error bar. I wonder if it were possible to make those errorbars even
broader - perhaps as broad as a histogram bar?

NSV


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Thanks Mike, an add-in that someone had bothered to make was exactly
what I had hoped for, I just didn't know where to find it, and I can't
make such things myself.
I couldn't see right away if it solves my problem, but I will download
and then hopefully it works.

I would like to attach a spreadsheet to illustrate the problem, but
this is for some reason not possible, so I attach a picture in stead.
The upper graph is a pure xy-type where I can choose an arbitrary
number of points to get a smooth line, but the vertical histogram
representation must be made with errorbars and they are too thin to
give a good picture
The bottom graph is a combined bar/line type where the linear
normaldistribution curve gets very clumsy because of the low number of
points it must interpolate.


+-------------------------------------------------------------------+
|Filename: Statsample.JPG |
|Download: http://www.excelforum.com/attachment.php?postid=4949 |
+-------------------------------------------------------------------+

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NSV -

Your attachment does not show up in the microsoft.public.excel.charting
newsgroup where I am reading your messages, and I would not usually open an
attachment, anyway.

An excellent source for information about combination charts is

http://www.peltiertech.com/Excel/Charts/index.html

- Mike
www.mikemiddleton.com

"nsv" wrote in message
...

Thanks Mike, an add-in that someone had bothered to make was exactly
what I had hoped for, I just didn't know where to find it, and I can't
make such things myself.
I couldn't see right away if it solves my problem, but I will download
and then hopefully it works.

I would like to attach a spreadsheet to illustrate the problem, but
this is for some reason not possible, so I attach a picture in stead.
The upper graph is a pure xy-type where I can choose an arbitrary
number of points to get a smooth line, but the vertical histogram
representation must be made with errorbars and they are too thin to
give a good picture
The bottom graph is a combined bar/line type where the linear
normaldistribution curve gets very clumsy because of the low number of
points it must interpolate.


+-------------------------------------------------------------------+
|Filename: Statsample.JPG |
|Download: http://www.excelforum.com/attachment.php?postid=4949 |
+-------------------------------------------------------------------+

--
nsv
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I'm writing this in www.excelforum.com where the attachment appears
perfectly, and I don't know how to reach you the other way.

The task is to illustrate the statistical result of a number of
measurements. The standard way is to show the actual measured values as
discreete bars and the estimated normal-distribution as an overlaid
continuous line. All statistics programs do this routinely, but I would
like to do it in Excel.

I understand perfectly the feeling about attachments. This attachment
is a .jpg picture, and I suppose such files are pretty safe. Anyway it
says a lot more than I can describe with words.

The Peltier pages are excellent, but I have not found a solution to
this problem.

I'm afraid the combination chart is out of question because the task
requires a large amount of x-values to smooth the line part of the
graph, but the numbers of bars is usually low. The combination chart
can not operate with different number of x's as the xy-chart can. A way
to manipulate the width of the y-errorbars would be ideal, if it only
were possible.


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On Thu, 29 Jun 2006, in microsoft.public.excel.charting,
nsv said:

The task is to illustrate the statistical result of a number of
measurements. The standard way is to show the actual measured values as
discreete bars and the estimated normal-distribution as an overlaid
continuous line. All statistics programs do this routinely, but I would
like to do it in Excel.

I'm afraid the combination chart is out of question because the task
requires a large amount of x-values to smooth the line part of the
graph, but the numbers of bars is usually low. The combination chart
can not operate with different number of x's as the xy-chart can.

What you have to do is make it a combination, not of a column series and
a line series, but a column series and a scatter series.

This is perfectly feasible; if you've already got your line series set
up, click on it and select "Chart Type". That will let you turn just
that series into a scatter graph. Now you can put as many points on the
bell curve as you need to make it look smooth.

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