I used to have an Excel spreadsheet that did a nifty thing: you'd paste in an image... say, a scan of an old graph... and then pick out specific points on that graph. You'd pick out points on the line, and known values of the X and Y axes. Linear or log, whatever, even if the graph was warped or rotated, it'd figure out what the values were and rebuild the graph as a regular Excel graph. It was a great way to back data points out of ancient printed data. Alas, that spreadsheet disappeared with my employment.

Here's a graph that I'd love to back a single value out of.... the yield "X" of the 1963 design study. Were the Y axis linear, it'd be easy, but it's logarithmic, and that makes it more difficult. Anybody able and willing to help? Anybody have an Excel spreasheet that does what I mentioned?

Here's a graph that I'd love to back a single value out of.... the yield "X" of the 1963 design study. Were the Y axis linear, it'd be easy, but it's logarithmic, and that makes it more difficult. Anybody able and willing to help? Anybody have an Excel spreasheet that does what I mentioned?