In the past, I have used two programs to extract datapoints from a graph. The typical use case is to save the coordinates extracted from a pdf or png graph, so that you can use them for calculations or to overlay on your graphs.
1. DataThief: A shareware program that is cross platform. It is written in Java and works on Windows, MacOS, and Linux.
2. Engauge Digitizer: This is also cross platform. I have written a little bit about using it here.
In the past month, I discovered WebPlotDigitizer.
It is completely web-based, so on doesn't have to "install" it. This means, it is completely blind to the underlying operating system. The interface overall seems much spiffier, but I haven't taken it out for a serious test drive.
1. DataThief: A shareware program that is cross platform. It is written in Java and works on Windows, MacOS, and Linux.
2. Engauge Digitizer: This is also cross platform. I have written a little bit about using it here.
In the past month, I discovered WebPlotDigitizer.
It is completely web-based, so on doesn't have to "install" it. This means, it is completely blind to the underlying operating system. The interface overall seems much spiffier, but I haven't taken it out for a serious test drive.
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