the best way to extract data from a figure

June 8, 2007, 07:48

Dear all,

What's the best way, in your opinion, to extract data from a figure in a published paper. I am doing modelling and want to compare my results with well established and recognized results in a published paper. I am wondering if there is some nice software which can do this job well and in an easy way. Thanks a lot for your experience.

June 8, 2007, 08:09

I dont know about the "best" but this does the job

http://digitizer.sourceforge.net/

June 8, 2007, 14:23

http://plotdigitizer.sourceforge.net/

June 10, 2007, 01:58

this one works too.

http://www.frantz.fi/software/g3data.php

ankitrohatgi · September 27, 2010, 13:06

Well this thread is old, but I'm still posting a reply since this shows up on Google when you search for this stuff.

There's a web based program: http://www.arohatgi.info/WebPlotDigitizer/

Yes, I made it :P

mukut · September 27, 2010, 22:08

thanks. I have collected all these software for my future need.

raggar · December 12, 2010, 08:29

http://getdata-graph-digitizer.com/

It was freeware for russian students two year ago.

pano · December 18, 2010, 13:16

Guys, few years ago, I extensively used a wee code called Windig, it was pretty convenient as it had a cool magnifier and could rotate the scanned images or whatever as you wished. Simple and functioning. I still have the zipped file, should anyone want to have it, just ask me to send an e-mail to you. Unfortunately, it doesnt work on 64bit OSs. Take care, Pano

ankitrohatgi · January 19, 2011, 11:16

I am currently developing my web-based program which I mentioned above to be able to automatically detect points on curves and deal with polar and ternary diagrams as well. This will take some time, but I'll update the group once I've done all that and you can perhaps suggest more features to add.

ankitrohatgi · March 15, 2011, 15:21

I have completed the second version on my web based program to extract data from plots. You can check it out at http://arohatgi.info/WebPlotDigitizer

I have also made a convenient Chrome app for it.

This version supports XY charts, polar plots, ternary diagrams and maps. I have included an auto extraction system in it which can pull out large number of points for fairly uncomplicated plots.

You need Firefox 3.6+ or Chrome 6+ to use this. You don't need to install anything else for this.

sail · March 15, 2011, 15:45

Quote:

Originally Posted by ankitrohatgi

I have completed the second version on my web based program to extract data from plots. You can check it out at http://arohatgi.info/WebPlotDigitizer

I have also made a convenient Chrome app for it.

This version supports XY charts, polar plots, ternary diagrams and maps. I have included an auto extraction system in it which can pull out large number of points for fairly uncomplicated plots.

You need Firefox 3.6+ or Chrome 6+ to use this. You don't need to install anything else for this.

looks wonderful! thank for your effort. i'll test it asap.

mohammad · March 16, 2011, 00:46

That was easy and wonderful.....THANKS

siddhaling · March 17, 2011, 12:44

em student of engg.

guys i have just started with CFD
& i use Tecplot for extracting the data, for above purpose;
What r the merits of above aplications over it.

pls reply.

siddhaling · March 17, 2011, 12:48

Hey can anone tell me how to apply orthgonality in grids.
I have developed C Code for elliptical equations.
(Cylinder placed in a fluid channel).

thanks

titanic12 · March 17, 2011, 20:43

Hi,
Last time I read a book including this topic. After coding based on some equations in that book, I generated an orthogonal mesh.

Sorry that I forgot the title of that book.
Best wishes
Dave

siddhaling · March 18, 2011, 05:57

thanks dave;

i need some more guidance for that will u please give me your email id;

my email id is : siddhaling@gmail.com

ashwingm · June 8, 2016, 07:54

Where do I change the proxy address, so that I can use it through my university's LAN connection? Since you made the program, please reply.

Quote:

Originally Posted by ankitrohatgi

Well this thread is old, but I'm still posting a reply since this shows up on Google when you search for this stuff.

There's a web based program: http://www.arohatgi.info/WebPlotDigitizer/

Yes, I made it :P

ankitrohatgi · June 8, 2016, 22:41

Since this program is web based, you will be using your web browser to open the website (and the program). Just ensure that your web browser or OS have the appropriate proxy settings. It's not different from opening any other website in your browser.

JohnnyE · February 25, 2020, 15:43

Hi folks,

If anyone is interested, we have launched a free graph digitizer. You can use it to extract 1000's of points on a spectral curve in seconds. Give it a try and let me know what you think.

https://www.opticsforhire.com/graph-digitizer

John

Tinvink · April 8, 2021, 01:28

Hello everyone,

Many of the programs listed in this thread are now outdated and not maintained by developers. Nowadays, I hardy use anyone of the mentioned. But there is one tool that I found to be very helpful to extract data from figures. And it is PlotDigitizer. It is freemium software, but I found it far better than any others I have ever used. You can auto-extract data from various graphs (XY, polar, ternary, bar, pie). You can read more on it on its website or check out is free online app.

June 8, 2007, 07:48	the best way to extract data from a figure	#1
Feitoudaer Guest Posts: n/a	Dear all, What's the best way, in your opinion, to extract data from a figure in a published paper. I am doing modelling and want to compare my results with well established and recognized results in a published paper. I am wondering if there is some nice software which can do this job well and in an easy way. Thanks a lot for your experience.

June 8, 2007, 08:09	Re: the best way to extract data from a figure	#2
Praveen. C Guest Posts: n/a	I dont know about the "best" but this does the job http://digitizer.sourceforge.net/

June 8, 2007, 14:23	Re: the best way to extract data from a figure	#3
FYW Guest Posts: n/a	http://plotdigitizer.sourceforge.net/

June 10, 2007, 01:58	Re: the best way to extract data from a figure	#4
matej Guest Posts: n/a	this one works too. http://www.frantz.fi/software/g3data.php

September 27, 2010, 13:06	Web Based Program	#5
ankitrohatgi New Member Ankit Rohatgi Join Date: Sep 2010 Posts: 5 Rep Power: 16	Well this thread is old, but I'm still posting a reply since this shows up on Google when you search for this stuff. There's a web based program: http://www.arohatgi.info/WebPlotDigitizer/ Yes, I made it :P mumtazcore and ashwingm like this.

September 27, 2010, 22:08		#6
mukut Senior Member Mominul MuKuT Join Date: Mar 2009 Location: Bangladesh Posts: 124 Rep Power: 18	thanks. I have collected all these software for my future need.

December 12, 2010, 08:29		#7
raggar New Member Igor Join Date: Dec 2010 Posts: 3 Rep Power: 16	http://getdata-graph-digitizer.com/ It was freeware for russian students two year ago.

December 18, 2010, 13:16		#8
pano New Member Pano Join Date: Apr 2010 Posts: 12 Rep Power: 17	Guys, few years ago, I extensively used a wee code called Windig, it was pretty convenient as it had a cool magnifier and could rotate the scanned images or whatever as you wished. Simple and functioning. I still have the zipped file, should anyone want to have it, just ask me to send an e-mail to you. Unfortunately, it doesnt work on 64bit OSs. Take care, Pano

January 19, 2011, 11:16	WebPlotDigitizer	#9
ankitrohatgi New Member Ankit Rohatgi Join Date: Sep 2010 Posts: 5 Rep Power: 16	I am currently developing my web-based program which I mentioned above to be able to automatically detect points on curves and deal with polar and ternary diagrams as well. This will take some time, but I'll update the group once I've done all that and you can perhaps suggest more features to add.

March 15, 2011, 15:21	WebPlotDigitizer 2.0	#10
ankitrohatgi New Member Ankit Rohatgi Join Date: Sep 2010 Posts: 5 Rep Power: 16	I have completed the second version on my web based program to extract data from plots. You can check it out at http://arohatgi.info/WebPlotDigitizer I have also made a convenient Chrome app for it. This version supports XY charts, polar plots, ternary diagrams and maps. I have included an auto extraction system in it which can pull out large number of points for fairly uncomplicated plots. You need Firefox 3.6+ or Chrome 6+ to use this. You don't need to install anything else for this. happydogy, ndabir, flotus1 and 1 others like this.

March 16, 2011, 00:46	To Anki	#12
mohammad Senior Member mohammad Join Date: Dec 2010 Location: UK Posts: 246 Rep Power: 17	That was easy and wonderful.....THANKS

March 17, 2011, 12:44	doubt	#13
siddhaling New Member siddhaling Join Date: Mar 2011 Posts: 6 Rep Power: 16	em student of engg. guys i have just started with CFD & i use Tecplot for extracting the data, for above purpose; What r the merits of above aplications over it. pls reply.

March 17, 2011, 12:48	hi	#14
siddhaling New Member siddhaling Join Date: Mar 2011 Posts: 6 Rep Power: 16	Hey can anone tell me how to apply orthgonality in grids. I have developed C Code for elliptical equations. (Cylinder placed in a fluid channel). thanks

March 17, 2011, 20:43		#15
titanic12 New Member Dave Join Date: Mar 2011 Posts: 2 Rep Power: 0	Hi, Last time I read a book including this topic. After coding based on some equations in that book, I generated an orthogonal mesh. Sorry that I forgot the title of that book. Best wishes Dave

March 18, 2011, 05:57		#16
siddhaling New Member siddhaling Join Date: Mar 2011 Posts: 6 Rep Power: 16	thanks dave; i need some more guidance for that will u please give me your email id; my email id is : siddhaling@gmail.com

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June 8, 2016, 22:41		#18
ankitrohatgi New Member Ankit Rohatgi Join Date: Sep 2010 Posts: 5 Rep Power: 16	Since this program is web based, you will be using your web browser to open the website (and the program). Just ensure that your web browser or OS have the appropriate proxy settings. It's not different from opening any other website in your browser.

February 25, 2020, 15:43	Free Graph Digitizer tool	#19
JohnnyE New Member John Join Date: Feb 2020 Posts: 2 Rep Power: 0	Hi folks, If anyone is interested, we have launched a free graph digitizer. You can use it to extract 1000's of points on a spectral curve in seconds. Give it a try and let me know what you think. https://www.opticsforhire.com/graph-digitizer John

April 8, 2021, 01:28	Free online browser based program plotdigitizer	#20
Tinvink New Member Kelvin Join Date: Apr 2021 Posts: 1 Rep Power: 0	Hello everyone, Many of the programs listed in this thread are now outdated and not maintained by developers. Nowadays, I hardy use anyone of the mentioned. But there is one tool that I found to be very helpful to extract data from figures. And it is PlotDigitizer. It is freemium software, but I found it far better than any others I have ever used. You can auto-extract data from various graphs (XY, polar, ternary, bar, pie). You can read more on it on its website or check out is free online app.