Get data from plotted figure?

I attached a plotted fig that plotted by method. How can I get data from traction effort(y axis) and speed (x axis) and represent it in Excel?

[Image Analyst]

Didn't you plot it? So you should already have the x and y data, right? So then simply use xlswrite().

Answer 1

[Walter Roberson]

Look in the File Exchange for tag:digitize

[ahmed fares]

thanks but ineed more help AND MORE ILLUSTRATION PLEASE GIVE ME YOUR MAIL , FACE, WHATS ACCOUNT OR ANY CONTACT WITH UOU THANKS

[Walter Roberson]

I do not undertake free private consulting.

In the past, I have gone through and tagged 24 File Exchange contributions that have to do with digitizing images of plots into usable data; https://www.mathworks.com/matlabcentral/fileexchange/?utf8=%E2%9C%93&term=tag%3Adigitize . If you have questions about one of the 24, you should ask the specific questions instead of just saying that you need more help.

[ahmed fares]

So my specific question how can i get data from above attached photo that represent velocity in (x axis)(traction effort in (y axis) then plott it again in matlab note iam not perfect in code so its too hard for me

[Walter Roberson]

Use the Add On Explore to install some of the File Exchange contributions you find from the above link, and try them out.

The plots are pretty simple; you could probably pretty much read them off by eye. If you want to try for higher resolution, try Image Analyst's code at https://www.mathworks.com/matlabcentral/answers/130306-how-do-i-find-the-distance-between-two-pixel-co-ordinates#answer_137530 to calibrate according to the grid lines and then to use the results to measure more precisely where the lines are.

[ahmed fares]

ok i will try and going to return back thanks