This thread is about Reading graphical and tabular data with Excel video.
This is added to complement the Excel tips section in the site help.
This video can also be viewed on YouTube:

I was thinking about this, and decided that it was indeed a useful thing to be able to do. The attached spreadsheet is a rough example of an enhanced implementation of what you're showing in the tutorial.

It's set up to take advantage of image editing programs (like paint) that show a readout of pixel coordinates as you move the pen over the image. One fills in the table with pixel coordinates (D3:E5) & (D8:E27), and the min, max scale values (B3:C5). It then automatically remaps the coordinates to match the graph rather than the image, and scales them to their intended values. Fairly handy for accurately pulling chart values from an image.

For interpolation you can enter a trial x value (B8), and it will calculate the matching y value, using several types of curve fitting. Fairly handy for getting additional values without going back to the image.

MajorMagee you are to be commended once again for your hard work. In particular a special commendation for the formula in cell C17 - the 7th order polynomial curve fit - certainly not be be attempted after a few beers.

Your use of 'paint' programs for data input is also very innovative.

After all these commendations it is only a matter of time before you become ColonelMagee! Thanks for your very useful addition.

Thanks.

You've inspired a little more refinement. This version includes some simple instructions, and can accomodate a graph where the axis origin is not at 0,0.