Hi there. I have a chronological dataset of approximately 30+ points on
excel, graphed up. I would like to add a linear trend line to this dataset,
but only based on the last 10 points (rolling as I add new data). Basically,
I want to retain 30+ weeks of data on the graph, but only want to see the
trend of the last 10 weeks.....

Tricky one?

Many thanks

Rob

Rob,
It has been a while since I last did this...
Add a second (duplicate) series, make it invisible, add the trend line to the new series.
If I remember correctly all of the point values should be zero except for the
last ten points. Tell the chart to not plot zeros.
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware


"Rob Murphy" <Rob
wrote in message
Hi there. I have a chronological dataset of approximately 30+ points on
excel, graphed up. I would like to add a linear trend line to this dataset,
but only based on the last 10 points (rolling as I add new data). Basically,
I want to retain 30+ weeks of data on the graph, but only want to see the
trend of the last 10 weeks.....
Tricky one?
Many thanks
Rob

Hi Jim

You're right, it can be done this way. To be honest I was being a bit lazy
and hoping there was someway I could 'modify' the trend line to always
automatically pick up the last 10 points. The reason I'm being a bit lazy is
tis is part of my companies whole KPI reporting and there are about 90 graphs
(a bit crazy I know!!!).

If there isn't a 'funky' way of modifying the trendline itself, I'll crack
on with this solution.

Thanks for your help

Rob

"Jim Cone" wrote:

Rob,
It has been a while since I last did this...
Add a second (duplicate) series, make it invisible, add the trend line to the new series.
If I remember correctly all of the point values should be zero except for the
last ten points. Tell the chart to not plot zeros.
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware


"Rob Murphy" <Rob
wrote in message
Hi there. I have a chronological dataset of approximately 30+ points on
excel, graphed up. I would like to add a linear trend line to this dataset,
but only based on the last 10 points (rolling as I add new data). Basically,
I want to retain 30+ weeks of data on the graph, but only want to see the
trend of the last 10 weeks.....
Tricky one?
Many thanks
Rob

No lazy way out of this one, I'm afraid.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
_______


"Rob Murphy" wrote in message
...
Hi Jim

You're right, it can be done this way. To be honest I was being a bit lazy
and hoping there was someway I could 'modify' the trend line to always
automatically pick up the last 10 points. The reason I'm being a bit lazy
is
tis is part of my companies whole KPI reporting and there are about 90
graphs
(a bit crazy I know!!!).

If there isn't a 'funky' way of modifying the trendline itself, I'll crack
on with this solution.

Thanks for your help

Rob

"Jim Cone" wrote:

Rob,
It has been a while since I last did this...
Add a second (duplicate) series, make it invisible, add the trend line to
the new series.
If I remember correctly all of the point values should be zero except for
the
last ten points. Tell the chart to not plot zeros.
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware


"Rob Murphy" <Rob
wrote in message
Hi there. I have a chronological dataset of approximately 30+ points on
excel, graphed up. I would like to add a linear trend line to this
dataset,
but only based on the last 10 points (rolling as I add new data).
Basically,
I want to retain 30+ weeks of data on the graph, but only want to see the
trend of the last 10 weeks.....
Tricky one?
Many thanks
Rob

OK, thanks very much...........perhaps in the next version of Excel......

Regards

Rob

"Jon Peltier" wrote:

No lazy way out of this one, I'm afraid.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
_______


"Rob Murphy" wrote in message
...
Hi Jim

You're right, it can be done this way. To be honest I was being a bit lazy
and hoping there was someway I could 'modify' the trend line to always
automatically pick up the last 10 points. The reason I'm being a bit lazy
is
tis is part of my companies whole KPI reporting and there are about 90
graphs
(a bit crazy I know!!!).

If there isn't a 'funky' way of modifying the trendline itself, I'll crack
on with this solution.

Thanks for your help

Rob

"Jim Cone" wrote:

Rob,
It has been a while since I last did this...
Add a second (duplicate) series, make it invisible, add the trend line to
the new series.
If I remember correctly all of the point values should be zero except for
the
last ten points. Tell the chart to not plot zeros.
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware


"Rob Murphy" <Rob
wrote in message
Hi there. I have a chronological dataset of approximately 30+ points on
excel, graphed up. I would like to add a linear trend line to this
dataset,
but only based on the last 10 points (rolling as I add new data).
Basically,
I want to retain 30+ weeks of data on the graph, but only want to see the
trend of the last 10 weeks.....
Tricky one?
Many thanks
Rob