Graphs not working!

2020-05-21: Our server is having issues that is causing the graphs not to function. I'm looking into it and hope to have a fix shortly. The regression functions still work, just not the graphs.—A.A.Q.

Data entry

Polynomial Regression Online Interface

This interface is designed to allow the graphing and retrieving of the coefficients for polynomial regression. This includes the mean average and linear regression which are both types of polynomial regression. Higher-order polynomials are possible (such as quadratic regression, cubic regression, ext.) making this tool useful for a range of analysis.

The data to analyze is placed in the text area above. It must be formatted so the first column is the x-values, and the second column the y-values. Columns may be separated by any character such as a comma. This character used for separation has to be specified. The same is true for the row separators. Generally a comma, space, or tab is used to separate columns and a linefeed to separate rows. Copying data from common spreadsheet software uses a tab to separate columns, and a linefeed to separate rows.

The regression analysis has several results that can be displayed. The equation displays the function that will produce the regression line. The coefficient check box will enable the individual coefficients to be printed from lowest order to highest. This is useful for copying the coefficients. A graph of the data and the regression line can also be made. This allows visual inspection of the data and the fit of the regression function. Lastly the R2 value can be displayed. This is a value that ranges between 0 (the worst fit) to 1 (a perfect fit) and used to determine the goodness of fit. The time needed to run the regression analysis is always displayed and reflects how long the server spent calculating the data.

Examples are provided to demonstrate various regression plots, and how the data is entered. To show the example, check the "Show examples" check box, and then select an example to display. After an example has been selected, the data for the example will be loaded into the form. Submitting this data will run the regression analysis and display the results. Each example displays the starting function so the fit can be compared.

Because this is a server-side script, the amount of data that can be entered is limited to 10000 points. The maximum number of coefficients to use in the regression analysis is limited to 15. Lastly, the precision of the data is limited to 20 decimal places. Should you require more data or coefficients, feel free to download the PHP library and run this program on your own computer.

User comments

From Andrew Que (http://www.DrQue.net/)

Middleton, WI, USA

May 05, 2014 at 6:47 PM

Leave some feedback if you found this interface useful.

From Kat

Fayetteville, AR

December 08, 2014 at 10:35 AM

This was very helpful since I forgot my calculator! Thank you so much! Would it be possible to add logarithmic or exponential regression to the list of available choices, please?

From Ken A

Southeast PA

December 12, 2014 at 1:41 PM

A most excellent tool.  Thank you!

From Pat

Melbourne, FL

December 16, 2014 at 9:34 AM

Really great, thanks so much.

From Sebastian

Wallingford, CT

January 08, 2015 at 8:00 PM

Thanks so much, I don't have a graphing calculator with polynomial regression, so helpful.

From Adam Douglass

Sierra Vista, AZ

January 09, 2015 at 11:25 AM

Thank you, this website helped my group with my engineering project. We got a strange graph by measuring the C02 output of a proof of concept for a mosquito trap mechanism, and we used heptic regression on split up portions of the graph, and obtained a rough estimate of the function of our graph. Thank you.

From Eduardo Contreras (http://urstupid.com)

your butt,CA

March 05, 2015 at 4:48 PM

this website is stupid and u have no life

From Roger

Portland OR

March 12, 2015 at 12:08 PM

I needed to find a best fit curve using more coefficients than my spreadsheet software provided.  This website was perfect!

From Jose Luis Navarro

Madrid

April 17, 2015 at 4:11 AM

Excellent job

From f you

April 25, 2015 at 5:28 PM

stupidest f-ing website ever

doesn't make any f-ing sense and doesn't f-ing work

From raj

April 30, 2015 at 5:12 AM

very helpful indeed

From Jesus Mejia Mendoza

Queretaro, Mexico

May 21, 2015 at 11:09 AM

This application help to me to fit easy, confident and fast the test data into the functions to make more confortable my work, thanks.

From Anil (http://kepran.com)

bangalore India

May 27, 2015 at 6:19 AM

Very helpful indeed. Thank you so much...

From Patrick

June 04, 2015 at 2:34 PM

Just awesome, we use this almost on a daily basis.

From Zoltan Vajda (http://r safety reason) )

Budapest, Hungary

June 18, 2015 at 12:49 PM

Thank you for your valuable work. I have checked theresults with Minitab vers. 14.0 and it is OK! Because Minitab works with Microsoft Windows only, and I use (for safety reason ) Ubuntu Linux , your page is a great help !

From rossisen (http://mathfest.blogspot.com)

North Bay, Canada

June 19, 2015 at 5:48 AM

This was very helpful for checking the results of regression calculations I am doing in the Geometer's Sketchpad.

From gyanguide (http://www.gyanguide.com/)

bangalore

October 05, 2015 at 4:46 AM

Thank you, this website helped my group with my engineering project.

From infocampus (http://infocampus.co.in/)

marathahalli

October 06, 2015 at 6:36 AM

it is very helpful .thankyou for posting

http://infocampus.co.in/web-designing-training-in-bangalore.html

From Mike S.

Pacific Grove, CA

October 15, 2015 at 2:20 PM

Thank you!  I needed a high-precision polynomial regression fit and your site gave me EXACTLY what I needed.  Simple and highly functional - perfect.  Thanks again.

From Day (http://Brazil)

October 28, 2015 at 11:40 AM

Very good!Help me a lot.Thank you

From Mark Ptak (http://www.we4kids.com)

Madison, wi

November 30, 2015 at 9:05 PM

Very nice.  Any hints on how to force a curve that always has a negative or zero slope?

From Nani

Stutensee

December 02, 2015 at 8:59 AM

Impressive

From mike

california

December 27, 2015 at 8:29 PM

you need a data input example

From Bob

Melbourne, Australia

February 10, 2016 at 12:33 AM

Could you submit your PHP libraries to GitHub, Composer/Packagist?

From Peter Rasmussen

Cornwall, UK

February 20, 2016 at 8:20 AM

I stumbled across this site by accident and found it so helpful in my project

From I don't understand

USA

February 20, 2016 at 11:34 AM

I don't get how this works. It makes no sense. I can't enter my data properly.

From Paul wilm (http://DIS T156.Ord)

Chicago Illinois

April 29, 2016 at 8:22 PM

If users just looked at the the examples provided it's easy to see how to enter data in the correct format. Great format for modeling reliability and validity of assessment item analysis data.

From Kyle

USA

May 19, 2016 at 2:09 PM

This website was extremely helpful! It was great to be able to take output from a java program in a txt and then just copy and paste!  Very very helpful:)

From Eric

Tennessee

May 21, 2016 at 2:45 AM

Very helpful. I am using Air Force DATCOM program to calculate some control coefficients for an aircraft design. I have to use experimental CFD wind tunnel data to get the longitudinal coefficients. Well, DATCOM has arrays for the data inputs, and one array wanted slopes of a function (like pitching moment due to alpha). That line is NOT linear, so I entered in the data as two columns, alpha vs. pitching moment and got the nice equation. Then, I took first derivative of the equation and used that in spreadsheet cells to generate the line slopes at any given alpha. Saved me ton of time and grief. Thank you. 

From miz

May 21, 2016 at 10:12 AM

this saved my life, multiple times. it works so well!

From Maz

Aberdeen, Scotland

May 31, 2016 at 1:16 PM

Thank you taking the time for developing the tool and sharing it with us. Very helpful.

From JD

Tulsa, OK

July 19, 2016 at 2:04 PM

Saved for later.  Can't use it this time because my dataset is too big.

Thanks for the development.

From Naef

August 14, 2016 at 10:43 AM

very useful, thanks.

From pgmaser

Houston, Texas

August 16, 2016 at 7:28 PM

Any chance you could show equations model or approximations.  How are finding the Coefficient of Determine for higher order Polynomial.  Website is Great, its works and its graph and solving

some of my problems. Anyway, I need some help in solving cubic equations in a labview environment.  pgmaser@aol.com if anyone wants to suggest somethings.

From MHSLRD (http://Reddind, California)

Aug 17, 2016

August 17, 2016 at 5:35 PM

EXCELLENT!  Thank you.

From Steve

Niceville, FL

September 21, 2016 at 9:02 AM

Tried Excel and Matlab - both failed miserably to come up with a curve fit.  Your tool worked perfectly!  Thanks!

From JT

United Kingdom

September 27, 2016 at 4:51 AM

Absolutely amazing resource.  There are many tools for curve fitting, but most have very limited data sets.  This gives you much more data set freedom, but the real power of this tool is being able to force coefficients.  I couldn't find any other tool online that could do that, including paid sites.  Well done and thanks for providing this!

From Tom

The Netherlands

October 08, 2016 at 5:48 AM

Very handy, easy to use. Thanks a lot!

From Emanuel

Croatia

November 16, 2016 at 3:43 AM

Very good site, but you have a bug on logaritmich regression. The resulthing coefficients are missmatched. It should be f(x) = B*ln(x) + A.

From School boy Q

Sioux falls South Dakota

November 22, 2016 at 9:59 AM

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caia conio

November 30, 2016 at 1:16 AM

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November 30, 2016 at 4:48 AM

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November 30, 2016 at 4:49 AM

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From From

November 30, 2016 at 4:54 AM

Cogia todos los pics y los reventaba.

From BUSCO RIÑON (http://organos.net)

Rumania

November 30, 2016 at 5:06 AM

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Vendedores serios Gracias

From Thomas (http://robo-t.org)

Tirana, Albania

December 02, 2016 at 5:23 AM

This is great for use in our robotics class.  Our robotic arm has several non-linear relationships towards the ends of its extremes. It would be fairly hard to come up with an efficient and accurate function  You helped me produce the formulas for spatial coordination.   

From The Big G

Con Tu Mama

December 08, 2016 at 4:01 PM

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December 08, 2016 at 4:02 PM

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La verga

December 08, 2016 at 4:04 PM

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December 08, 2016 at 4:14 PM

. Bush did 911

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From Raffaele

Pistoia (Italy)

December 14, 2016 at 3:06 AM

Strumento utilissimo. Grazie infinite...

From Sam

Cardiff, Wales

January 15, 2017 at 4:08 PM

This is great! I created my own version of this a while back but when I got >8 degrees it became slow. But this website can handle 15 degrees with no problem. How??

From Francois

Paris, France

January 23, 2017 at 6:38 AM

Very nice, fast.

It would be great to have the maximum error.

From Mansur

Pittsburgh, PA

February 02, 2017 at 6:26 PM

Excellent tool, thank you so much!

From dhananjay (http://www.rginfotechnology.com)

Noida

February 13, 2017 at 5:21 AM

very good tool, thankful to you.

From Blaise

Minnesota, USA

February 16, 2017 at 6:27 AM

Thank you very much, this works great and I use it a lot.

From Alex

Canada

February 23, 2017 at 9:35 PM

Thank you this tool. Usually I use MS Excel to play with polynomials to see how measurements behave, but it is limited to 6 order polynomial only while sometimes I need to verify data against 9- or ever 11-order. A quite helpful tool!

From Rajnikanth

India

February 28, 2017 at 6:51 AM

This is great and very useful. I want to fit still higher order and  my datapoints is ~8000. where is the link to download php code. I will refer your work.

From Walter74

Chamonix, France

March 15, 2017 at 11:19 AM

Hi,

While checking some 2nd degree polynomial R²s produced using your Code against Excel values, I came across some anomalies when a set of data contained a number of values smaller than 0.0001 . However, these anomalies disappeared when I set the bcMaths to bcscale(20).

One example: 0.7142 compared to an Excel value of 0.9629

This post is duplicated on the http://polynomialregression.drque.net/ page

Hope this is helpful & thanks again.

Yours, Walter

From AD

UK, north west

May 08, 2017 at 7:10 AM

Simple to use and got me a great fit equation for an old road using measured coordinates.

From Suny

utah

July 19, 2017 at 8:33 PM

Wow, simplest and yet most accurate calculator ever!!! Bomb bomb bomb

From WRL

Newport, RI

August 08, 2017 at 11:13 PM

Nice tool.  Worked great.  I don't understand how some users had a problem.  Then of course there are the morons.  Anyway tool produced a better fit than Excel.  Thank you for the effort.

From steve

Ventura, ca

August 22, 2017 at 11:01 AM

Fantastic tool. Really appreciate the site.

From Dan

Appleton, WI

November 28, 2017 at 7:59 PM

Helped me do linear regression with 15 coefficients! I actually needed that many coefficients but M$ Excel in 2017 limits to the sixth power.

From Serhan

Europe

February 26, 2018 at 7:52 AM

greatt

From Aaron Kreider (http://www.justicemap.org)

March 20, 2018 at 6:32 PM

It isn't clear what order the columns are (x1, x2...xn, and y).

From Drew

April 20, 2018 at 3:02 PM

Exactly what I needed. Thanks!

From Eric

NY

May 14, 2018 at 12:20 PM

life saver

From preethievolet (http://www.etcoe.in)

RT nagar, Bangalore

August 30, 2018 at 1:00 AM

Very useful.

From Kalersky

Sydney AU

October 07, 2018 at 12:41 AM

Fantastic, works a treat, thanks.

From Alex

Moscow, Russia

October 10, 2018 at 12:44 AM

Thanks a lot

From Digitalkora (http://www.digitalkora.com)

Bangalore

November 24, 2018 at 12:23 AM

Wow, It's a great tool. It's very helpful to do our easy job. Thanks for sharing this great info.

From David (http://www.metrovial.mx)

Mexico City

December 12, 2018 at 2:50 AM

Excellent tool. Congratulations, just I'd like to add this comment:

While performing a regression of type f( x ) = a ln x + b something is working bad

I guess that coefficients a and b are swapped.

From John Ferreirinho

Perth Western Australia

March 13, 2019 at 8:52 AM

Great website and great calculator thanks.  I found the high order / degree polynomial regression very useful.

From suresh babu

bangalore

March 23, 2019 at 6:26 AM

Very good write-up. I certainly love this website.

From raj (http://www.sitegalleria.com)

Bangalore

April 15, 2019 at 12:35 AM

Great website and great calculator thanks.  Wow, It's a great tool. It's very helpful to do our easy job. Thanks for sharing this great info.

From Prof K K Mishre (http://www.gmail.com)

INDIA

April 15, 2019 at 2:29 AM

Highly abnormal as per data entry is concerned. So unable to enter the data.

Extremely abnormal hints for the data.

Suggested to give an example for data entry!

From Kurro

Igorre (Basque Country)

June 03, 2019 at 7:43 AM

Very good work, thank's for it!

From Dan Hunter

SF Bay, CA, US

August 01, 2019 at 3:01 PM

Worked flawlessly the 1st time. Thank you so much for your work on this!!

From Peter

Utrecht

October 04, 2019 at 5:02 AM

Very useful. Even if the data has more than 3 columns, the program automatically uses the first 2.

From Abraham Adamu

Ethiopia

January 28, 2020 at 11:20 PM

Thank you, I can't leave without a huge gratitude!!

But why can't I find a donate button for a nice and satisfying site like this?

From Noel Lloyd

Melbourne Australia

January 30, 2020 at 10:56 AM

Found the function that fits my data very closely, incredibly quickly.

AWESOME SITE !!

From Bharat (http://www.bharatgodigital.com/)

India

January 31, 2020 at 8:46 AM

Very useful article.Information.

From Veer

February 01, 2020 at 12:11 AM

I need help from someone ho can help me understand how to use this software

From Ceyhun

February 02, 2020 at 10:24 AM

this tool helped me a lot.

@Veer let me reach and help you..

From Big chungus

February 11, 2020 at 11:02 AM

Big chungus

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February 11, 2020 at 11:05 AM

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From your mom

February 11, 2020 at 11:06 AM

im being forced to do this against my will    help me please

From GEFFORY (http://cockandballtorture.com)

In Your CHuNkY MAmA

February 11, 2020 at 11:06 AM

Yes thank you Kanye very cool

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From Phone Guy

February 11, 2020 at 11:12 AM

Hello, hello? Uh, I wanted to record a message for you to help you get settled in on your first night. Um, I actually worked in that office before you. I'm finishing up my last week now, as a matter of fact. So, I know it can be a bit overwhelming, but I'm here to tell you there's nothing to worry about. Uh, you'll do fine. So, let's just focus on getting you through your first week. Okay?

Uh, let's see, first there's an introductory greeting from the company that I'm supposed to read. Uh, it's kind of a legal thing, you know. Um, "Welcome to Freddy Fazbear's Pizza. A magical place for kids and grown-ups alike, where fantasy and fun come to life. Fazbear Entertainment is not responsible for damage to property or person. Upon discovering that damage or death has occurred, a missing person report will be filed within 90 days, or as soon property and premises have been thoroughly cleaned and bleached, and the carpets have been replaced."

Blah blah blah, now that might sound bad, I know, but there's really nothing to worry about. Uh, the animatronic characters here do get a bit quirky at night, but do I blame them? No. If I were forced to sing those same stupid songs for twenty years and I never got a bath? I'd probably be a bit irritable at night too. So, remember, these characters hold a special place in the hearts of children and we need to show them a little respect, right? Okay.

So, just be aware, the characters do tend to wander a bit. Uh, they're left in some kind of free roaming mode at night. Uh...Something about their servos locking up if they get turned off for too long. Uh, they used to be allowed to walk around during the day too. But then there was The Bite of '87. Yeah. I-It's amazing that the human body can live without the frontal lobe, you know?

Uh, now concerning your safety, the only real risk to you as a night watchman here, if any, is the fact that these characters, uh, if they happen to see you after hours probably won't recognize you as a person. They'll p-most likely see you as a metal endoskeleton without its costume on. Now since that's against the rules here at Freddy Fazbear's Pizza, they'll probably try to...forcefully stuff you inside a Freddy Fazbear suit. Um, now, that wouldn't be so bad if the suits themselves weren't filled with crossbeams, wires, and animatronic devices, especially around the facial area. So, you could imagine how having your head forcefully pressed inside one of those could cause a bit of discomfort...and death. Uh, the only parts of you that would likely see the light of day again would be your eyeballs and teeth when they pop out the front of the mask, heh.

Y-Yeah, they don't tell you these things when you sign up. But hey, first day should be a breeze. I'll chat with you tomorrow. Uh, check those cameras, and remember to close the doors only if absolutely necessary. Gotta conserve power. Alright, good night

From em

February 12, 2020 at 10:56 AM

I think Peyton is gay:/

From Hasben

February 24, 2020 at 9:55 AM

Hasben hotel is a realy good show.

From Kevin Cain

February 25, 2020 at 1:05 PM

Hasben hotel has an amazing plot, with many well thought out characters.

From Kamal Mishra

February 26, 2020 at 12:00 PM

ABNORMAL and ABSURD mode of entries

From Subaru

Mumbai

March 12, 2020 at 11:49 AM

Thank you very very much! This was infinitely helpful!

From Raul Mauro (http://politekon-peru.blogspot.com)

Lima, Peru

April 24, 2020 at 6:36 PM

Powerful tool for everyone. Thanks a lot!

Feedback

2015-03-14

I want to thank everyone who has used this site and left feedback. This page is now the most active on my server. The popularity of the site has inspired me to add improvements. Comments about how the site is used is both gratifying as well as useful. Seeing applications where polynomial regression can be applied is useful to me as well as students who also use this site.

Feel free to make requests for features, interface options, ext. I can't promise I can implement them all, but getting a feeling for features/changes people want helps me consider where to concentrate improvement efforts.

Not everyone is always happy with this site—or having to use this site. Even primary school students from the Las Virgenes Unified School District in Los Angeles County, California are still free to voice their opinion. As long as the comments are not inundated with extraneous/malice remarks I support the right of students to voice their discontent. Disgruntled users may consider pointing out what they don't like about the site, why they don't like having to use the site, or why they don't enjoy the subject. Remember: what is written here cannot be censored by a school administrators.

Educators

One of the goals of this page was not only to provide a tool for calculating polynomial regression, but examples of how such techniques are used in real-world scenarios, and some of the mathematical phenomena exhibited.

Here are some articles on the mathematics of polynomial regression:

This site has been used by people from primary school through distinguished universities. My hope is to provide something that can be useful to each level of user. I do not expect that high school students will be able to follow partial differentiation and the linear algebra necessary for the equations behind the regression technique. However, a pre-calculus student might be able to visually understand the concept of minimizing a quadratic function. For university level students I hope the explanations are detailed enough to give a comprehensive picture of how and why the algorithms work.

These goals require feedback. Suggestions, additions, clarifications, corrections, and criticisms are all welcome. Language is not my strong point, and while I have tried to convey ideas in the most clear manner I don't always succeed. And while I am better at math I am far from above mistakes. So proof reading and peer review would be nice.

History

Privacy

The data submitted is analyzed server-side, and saved for the duration of the session (which is 24 minutes). Aside from the mathematics performed on the data, no other analysis is done. The data is not kept, and will never be shared—even with the site's author. We are not a data mining company. Nonetheless, this site does not use a secure connection (i.e. no encryption or authentication), and thus it isn't recommended this site be used to analyze highly sensitive sets of data.

We do, however, keep records for basic Web analytics. These are used for statistical purposes such as the number of visitors a day and tracking spam robots.

About

This page is designed and maintained by Andrew Que. To get in touch with Andrew Que, visit his contact page. It uses the Polynomial Regression class to preform the regression calculations and X/Y Plot to graph the results.