Extending trend lines in Numbers '09

I have a chart with a trend line, and I'd like for the trend line to extend past the last data point, to forecast where the data is heading. How do I do that? thanks.

Unfortunately, Numbers charts don't have an option to extend the line. However, if your trendline is a linear trendline, you can easily add a "forecasted" data point to your series in your table and include it in the plot. Or you can add forecasted points to both ends of your chart if you want to extend the line in both directions. If these forecasted points are outside of the range of your chart (i.e., less than the axis min or greater than the max), the forecasted data points will not plot, just the extended line.
Here is a thread on the subject:
http://discussions.apple.com/thread.jspa?messageID=10012513&#10012513

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Numbers 3.1 restricting the period for moving average trend lines

Numbers 3.1 is restricting the period I can specify for a moving average trend line for a scatter plot series. The max is 6. This limitation was not present in the previous version of Numbers.
Charts imported from the previous version retain larger periods, but there is no way I can see to specify periods >6 for any new series. Is there a way to allow a period >6? That is clearly necessary for many applications.
Thanks.

Hi Bill,
Numbers 3.1
If you want a 14 day moving average over the prior 14 days, the formula in C10 is
=AVERAGE(B2:B15) (and Fill Down)
The formula will eventually run out of cells. Hence the red error triangles.
Plotting columns A, B and C:
X axis is Day (column A)
Blue circles and blue line are Actual Y (column B and as expected, they jump around).
Black circles and black line are calculated moving averages on a 14 day period (column C)
Red line is Numbers Trendline (Moving Average, Period 6). How it predicts into the future (Moving Average over 6 days) I have no idea.
I would more trust a calculated moving average, because I know what it is calculating.
Regards,
Ian.

Add a trend line to a scatter graph

for my physics work i had to plot a graph and i need to add a trendline to the graph. I have plotted the graph as a scatter chart but dont know how to add a line of best fit, please help

Search "linear regression' in Numbers Help.
The FORECAST() function can be used to calculate the end points for the trend line using the minimum and maximum X values in your data set for the x value argument.
For example, with your data pairs listed in B3:B12 (x values) and C3:C12 (y values), add these values and formulas:
D3: 0
E3: =FORECAST(D3, C3:C$12, B3:B12)
D4: =MAX(B3:B12)
E4: =FORECAST(D4, C3:C$12, B3:B12)
The data pair on row 3 mark the y axis intercept of the trend line.
The pair on line 4 mark the position of the trend line where its x value is equal to the maximum x value of the data set. As plotting this pair may obscure the data point at this x value, you may want to move the trend line point to the right. To do this, add an arbitrary amount to the value in D4. The size of the added amount will depend on the scale of your graph.
eg. D4: =MAX(B3:B12)+2
If your data set includes negative x values, replace the formula in D3 with the mirror of the one in D4:
D3: =MIN(B3:B12)-2
Again, the "-2" is an arbitrary value used to extend the trend line beyond the collected x values.
This will allow you to plot these two points onto your scatter graph as a second data set. I don't see a means of making Numbers connect the points, so you will have to add the line manually.
Regards,
Barry

How can i make Trend lines in numers for iPad

Does numbers support trend lines? How can i make them?
Thank you in advance

Numbers on ipad does not give you the option of adding trend lines to your graphs at this time.
Jason

How to create trend line in cfchart?

I can create a scatter chart in cfchart - but I do not know how to create a linear regression trend line in the same chart as a second data series. Kodemonki provided an answer in a forum discussion a few years ago (http://forums.adobe.com/message/192848#192848) - but I am not able to make it work (I have a dangerously small knowledge of coldfusion and statisitcal formulas). Can someone tell me where i put in my to data query variables - such as for a query that gives results for two data fields, "Item1" and "Item2".
Here is Kodemonki's solution:


     <cfset min = 0>
     <cfset max = ceiling(arrayMax(grabData["value"])) + 1>
     <cfset n = grabData.recordCount>
     <cfset sum_x = 0>
     <cfset sum_x2 = 0>
     <cfset sum_xy = 0>
     <cfloop from="1" to="#grabData.RecordCount#" index="i">
          <cfset sum_x = sum_x + i>
          <cfset sum_xy = (i*grabData.value[i]) + sum_xy>
          <cfset sum_x2 = sum_x2 + (i*i)>
     </cfloop>
     <cfset sum_y = arraySum(grabData["value"])>
     <cfset slope = round(((n*sum_xy) - (sum_x*sum_y))/((n*sum_x2) - (sum_x*sum_x)))>
     <cfset intercept = round((sum_y - (slope*sum_x))/n)>
     <cfset best_fit = QueryNew("id, value")>
     <cfloop from="1" to="#grabdata.RecordCount#" index="i">
          <cfset queryAddRow(best_fit)>
          <cfset value = round((slope*i) + intercept)>
          <cfset QuerySetCell(best_fit, "id", grabData.xlabel[i])>
          <cfset QuerySetCell(best_fit, "value", value)>
     </cfloop>
     <cfchart scalefrom="#min#" scaleto="#max#" title="#GrabDatapointInfo.label#" format="jpg" chartHeight="450" chartwidth="500" xaxistitle="Month/Year">
          <cfchartseries type="line" query="best_fit" valuecolumn="value" itemcolumn="id"/>
          <cfchartseries type="line" query="grabData" valuecolumn="value" itemcolumn="xlabel"/>
     </cfchart>

Have you read the docs for CFCHART, CHCHARTSERIES, etc? Did you mess around with the example code sufficiently so you understand how the tags work?
http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSc3ff6d0ea77859461172e0811cbec22c24-79 30.html
Adam

How to create a trend line in cfchart?

I can create a scatter chart in cfchart - but I do not know how to create a linear regression trend line in the same chart as a second data series.
Kodemonki provided an answer in a forum discussion a few years ago (http://forums.adobe.com/message/192848#192848).
But I am not able to make it work (I have a dangerously small knowledge of coldfusion and statisitcal formulas).
Can someone tell me where i put in my to data query variables - such as for a query that gives results for two data fields, "Item1" and "Item2".
Thanks!
Here is Kodemonki's solution:


     <cfset min = 0>
     <cfset max = ceiling(arrayMax(grabData["value"])) + 1>
     <cfset n = grabData.recordCount>
     <cfset sum_x = 0>
     <cfset sum_x2 = 0>
     <cfset sum_xy = 0>
     <cfloop from="1" to="#grabData.RecordCount#" index="i">
          <cfset sum_x = sum_x + i>
          <cfset sum_xy = (i*grabData.value[i]) + sum_xy>
          <cfset sum_x2 = sum_x2 + (i*i)>
     </cfloop>
     <cfset sum_y = arraySum(grabData["value"])>
     <cfset slope = round(((n*sum_xy) - (sum_x*sum_y))/((n*sum_x2) - (sum_x*sum_x)))>
     <cfset intercept = round((sum_y - (slope*sum_x))/n)>
     <cfset best_fit = QueryNew("id, value")>
     <cfloop from="1" to="#grabdata.RecordCount#" index="i">
          <cfset queryAddRow(best_fit)>
          <cfset value = round((slope*i) + intercept)>
          <cfset QuerySetCell(best_fit, "id", grabData.xlabel[i])>
          <cfset QuerySetCell(best_fit, "value", value)>
     </cfloop>
     <cfchart scalefrom="#min#" scaleto="#max#" title="#GrabDatapointInfo.label#" format="jpg" chartHeight="450" chartwidth="500" xaxistitle="Month/Year">
          <cfchartseries type="line" query="best_fit" valuecolumn="value" itemcolumn="id"/>
          <cfchartseries type="line" query="grabData" valuecolumn="value" itemcolumn="xlabel"/>
     </cfchart>

Have you read the docs for CFCHART, CHCHARTSERIES, etc? Did you mess around with the example code sufficiently so you understand how the tags work?
http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSc3ff6d0ea77859461172e0811cbec22c24-79 30.html
Adam

Keep Quote line item numbers in Sales order

While creating a Sales order from Quote, SAP always creates line items with 100,200,300...and so on.
If quote has 3 line items say 100,110, & 120 and we create a sales order with reference to this quote in VA01. The sales order line items become 100,200 & 300.
The requirement is for Sales order to also have same line item numbers i.e. 100,110 & 120.
To retain quote line item numbers in Sales order the ABAP change will be in VOFM or user exit?

Hi,
It is not a straight forward thing. Adding data to table XVBAP won't work. It will create inconsistency. There are so many other tables involve here too, like, VBPA, VBUP, VBKD, KONV. There can be other tables too based on how your sales order is configured.
Also, modifying these tables (XTAB, YTAB ) in this user-exit may cause database inconsistency.
Regards,
RS

Can You Create Trend Line in CFCHART?

Have pretty much got CF7 Charts and WebCharts3D down, at
least to the point where they can do what I need the most. However,
the one thing I'd like to be able to do, but not sure if it's
possible, is create a TREND LINE.
This would be a LINE charts with 2 series. The first series
would be a line with the actual counts covering a period of time.
I'd like to add a 2nd line, using the same data from the
first series, but have it displayed as a TREND line. In Excel, you
can easily create a TREND line, it's even offered as an option.
I've seen somehwere (CFCHART or WebCharts3D) something to so
with "logarithmic" options, which is one of the options for Excel
charts.
Two more quick questions:
Q1. Is there any way to control the margin between the left
and right borders of the charts, and the bars? Have tried
experimenting, but can't seem to get this to work. Reason is, when
I try to show a chart in 3D, the first bar on the left is "butted
up" against the left chart border. Would like to add a little space
there.
Q2. Rather than display rectangular bars, I'd like to display
rounded cylinders. I've tried setting the chart type in CFCHART to
"cylinder" but it still displays a bar. When I try to change the
type to "cylinder" in WebCharts3D, the chart STILL displays
rectangular bars. Yet I've seen many examples of rounded, cylinder
bars.
Don't mean to push my luck with too many questions. Thanks
for any advice, help.
Gary

Trend Lines:
CFChart does not do trend lines of any type. However, it is
not too difficult to compute the regression of your choice and to
plot it as a second series.
Logarithmic:
Not sure what you are asking here.
In theory, cfchart does do log-lin and log-log charts.
However, it is so buggy, and the scaling problems are so
great, that we have never been able to get it to work well.
We use ChartDirector for anything that requires a log scale.
Side margins:
You cannot control these directly. Here are some workarounds:
For "Category" axis:
Make sure the "isBucketed" property is set to true (this is the
default).
If that is not enough, add extra bars to your data series,
usually value zero. It's not ideal but it may be good enough.
For "Scale" axis:
Usually this works well enough. Otherwise, try toggling the
"isAbsolute" property.
The only other recourse is to manually scale the plot using the
"scaleMin" and "scaleMax" properties. This can be a real pain for
obvious reasons and also because cfchart scaling is fraught with
bugs and "quirks".
Cylinder Bars:
These work. Perhaps there was a setting conflict within the
XML or between the CFChartSeries setting and the XML?
Also the cylinders will only look round when 3D is turned on.
(Side view of a cylinder is just a shaded bar.)
Anyway, I've said it before: cfchart is barely usable for a
very limited range of charts.
For real business or common engineering and scientific needs,
you need to step up to something better.
The package we use (has all the features and very reasonably
priced) is ChartDirector (
http://www.advsofteng.com/cdcoldfusion.html).
(And, no, I'm not affiliated.)

How to get trending line in the graph

Hi,
I am using 10g. I have requirement as the following :
Name Date Metric
I can have bar graph against Date and Metric. My requirement is to have a trending line, so I calculated slope and regression line y=mx+c but I am not getting the right trend line. I can use regr_slope function to create a view in rpd but it doesnt support date values. Can you guys let me know how to get trending line like same in Excel.
Thanks

Hi,
It's better to do at UI level.
Can you please check the below link:
http://kpipartners.blogspot.in/2009/04/linear-regression.html
Hope this helps.
Thanks,
Pramod.

Displaying a trend line (in line chart) in SSRS

We have a line graph which plots the actual data points (x,y), everything is working fine with this graph. Now we need to add a trend line to this existing graph after going thro. the articles we came to know that there is no direct option in SSRS to draw a trend line. So we need to calculate the trend values ourselves which we need to plot as atrend line. This trend line is similar to the trend line which comes in Excel chart, do anyone know how to calculate the trend values from the actual data points. We got through several formulas, but were not clear, have anyone tried out exactly the same, if so please help us out by providing an example to calculate the trend values.

The default functionality of Reporting Services does not support trend lines. There are some additional tools you can purchase to achieve this though, which is talked about in the first link below.
You can take a look at this post: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1148970&SiteID=1
and this one: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=322398&SiteID=1
Jarret

Extending a line, keeping the angle | But as part of a form!

http://helpx.adobe.com/illustrator/using/adjust-path-segments.html SAYS:
“Adjust the length or angle of straight segments
1. With the Direct Selection tool, select an anchor point on the segment you want to adjust.
2. Drag the anchor point to the desired position. Shift-drag to constrain the adjustment to multiples of 45°.”
Question: How do I proceed if I’d like to extend a line on one side by its endpoint, while I want to keep its original angle instead of 45° degrees?
And: assuming we’re not working with a standing-alone line, but as part of a construction, as you can see on the screenshot. The point should be move to the intersection on both lines (green and turquois).
I thought, maybe working with functions in GRAPHER – but I hope there is an easier way directly in ILLUSTRATOR.
Hints would be much appreciated.

Emil, this looks perfect, thank you a lot! I can not wait to give it a try !
May I ask a little detail while performing step nr. 3?:
When it comes to repeat the same drag at the lower part of the lozenge, the whole form is being addressed and scaled from the origine as soon as I start moving the point (it behaves as if the other points would also be selected).
I tryed the following combinations:
- click on the lowest point down in order to set the origine. Then click/hold on the second point (the one supposed to be dragged), and then drag the point.
- click on the lowest point down in order to set the origine. Then click/hold shift and then dragged the second point.
- click on the lowest point down in order to set the origine. Then just click/dragging the second point.
At all three tries, at least 3 sements of the lozenge were moved with the point, even once after deselecting the form. Do I omit any important detail?
Merci

Dynamic trend line on flash chart

Hi,
How could we reference an apex item on the custom XLM chart? I intend to add a dynamic trend line using
<objects>
<line value="&PXX_." text="trend line" color="0xFF0000" thickness="1" alpha="100"/>
</objects>
but it doesn't work. Could somebody guide me to the right direction.
And to add, anybody have integrated or call an statistical process control (SPC) chart in apex?
Thanks in advance.

You can create a process, create the entire XML string in the process, and set the resulting XML string in the Custom XML area. We did something similar and seems to be working fine.
Ravi

Need to know how to show P6 Report Line Item Numbers

Team... I cannot find where to turn on the line item numbers in P6 Reports... I can show breaks on a code then activities right below that, but can't show the line item number... only the actID... Hellllllllp!

Thanks... I can't give a screen dump right now... but I will try to describe in better details what I am trying to do:
Below is a sample report of a simple activity listing just as it would come from any P6 report:
ActID Description RDur Start Finish
ABC123 First Activity Here 9 01Jan10 10Jan10
DEF456 Second Activity Here 9 10Jan10 19Jan10
GHI789 Third Activity Here 9 19Jan10 26Jan10
Below is the desired report which now includes a new, first column which gives a unique line item number for each line:
Item# ActID Description RDur Start Finish
1 ABC123 First Activity Here 9 01Jan10 10Jan10
2 DEF456 Second Activity Here 9 10Jan10 19Jan10
3 GHI789 Third Activity Here 9 19Jan10 26Jan10
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Accessing trend line formula in Crystal Report

I am using Crystal Reports 8.5 and CR2008. I have a report showing a trend line (specifically the quadratic regression). I can show the formula that is being used for the report in the chart. How can I access the regression formula in Crystal Reports?
Thank you for your help.

hi James,
in short you can't...the charting engine is a separate 3rd party dll so what you see there is not necessarily available in the rest of cr in summaries etc.
in order to do things like this, you either have to do the calcs on your database or using formulas. i've attached an example of linear regression that i did a while ago. change the .txt extension to .rpt after you extract the contents. sorry, there are no instructions on how to do this.
on the attached sample though it does figure out the regression formula and also extrapolate data, show residuals etc. there are a couple of other "fits" in a parameter but i never finished those as it made my head hurt
-jamie

How do I add and or remove grid lines in numbers

How do I add or remove grid lines in numbers.

See this thread:
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Extending trend lines in Numbers '09

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