Transform the data on te x-y graph from pdf to excel 2

[silebi66]

Dear Master

Could you please tell me how to transform the following attached pdf x-y graph data to the excel ?

Since I saw someone do this trick and made a Multiple regression equation so that we can plug a variable to

get the answer we want.

Thank you very much for your suggestion and guidance.

 

[IRstuff]

Not without some conversion software. I use a program called Tracer, but it requires considerable cleanup of the graph to properly digitize the curves which have to be present individually for Tracer to do a good job. I normally use Paint.net to make clean copies of each curve separately for Tracer. This involves removing the markers, for example, as they'll tend to make the digitized curves "lumpy," as well as removing extraneous graphics.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529

 

[cowski]

I've had some success using engauge digitizer (free); like IRstuff, it required some manual intervention.

 

[IRstuff]

http://arohatgi.info/WebPlotDigitizer/

is free at least (Not sure why I got the wrong link in there)

Seems to do what Tracer does, more or less, but seems to have a couple of nicer features. I haven't actually tried to use it yet, though

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529

 

[IDS]

With the spreadsheet at the link below you can trace over any image pasted into the spreadsheet, and extract coordinates for the traced lines.

Its free and open source, and please ask if you have any problems using it.

https://newtonexcelbach.wordpress.com/2012/09/26/daily-download-10-excel-digitiser/

Doug Jenkins
Interactive Design Services

http://newtonexcelbach.wordpress.com/

 

[xnuke]

I've always liked Digitize It from ALcAsA. Some scaling and clicking on points is required.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[Clyde38]

Doug,

I've used "GetData Graph Digitizer" for many years and it performed well. I downloaded your spread sheet and tried it. It works like a charm and I intend to use it from now on. Thanks!

 

[silebi66]

Dear Sir

It is still hard to fit the following non linear data to get the equation from gnuplot. Could you please share any thought ? Thank you very much.