Advertisement

09.10.2008 at 01:27PM PDT, ID: 23720797
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.8

Remove data point from linear regression on the fly

Asked by I_play_with_DNA in Microsoft Excel Spreadsheet Software

Tags: , ,

Here's the situation:

I have a spreadsheet that contains data used to make a linear standard curve.  The LINEST function is used to perform a linear regression on the data to obtain the slope and intercept necessary to generate the standard curve.  I also have am XY chart where I've plotted the curve.

What I would like to be able to do is be able to remove any data point from the calculation on the fly (either by changing a value in a particular cell (for example, putting a Y in an "Exclude point" column) or by clicking a button next to the (X,Y) data and have that point removed from the LINEST equation in order to see the effect of removing that data point on the standard curve.

See the attached Excel file for an example of my sheet.  The X data is is B8-B21 and the Y data is D8-D21.  For example, I would like to remove (or "turn off") data point 1and immediately see the change reflected in the regression statistics and the chart without actually removing the data from the sheet.

Any help would be appreciated.Start Free Trial
Attachments:
 
Standard Curve
 
[+][-]09.10.2008 at 02:50PM PDT, ID: 22443534

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 7-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]09.10.2008 at 03:08PM PDT, ID: 22443667

View this solution now by starting your 7-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

 

About this solution

Zone: Microsoft Excel Spreadsheet Software
Tags: Microsoft, Excel, 2003
Sign Up Now!
Solution Provided By: brettdj
Participating Experts: 1
Solution Grade: A
 
 
[+][-]09.11.2008 at 02:00PM PDT, ID: 22454790

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 7-day free trial to view this Expert Comment or ask the Experts your question.

 
 
Loading Advertisement...
20080716-EE-VQP-32 / EE_QW_2_20070628