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automeris-io / WebPlotDigitizer

Computer vision assisted tool to extract numerical data from plot images.
https://automeris.io
GNU Affero General Public License v3.0
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WebPlotDigitizer returns NaN values #75

Closed juliengrouillet closed 8 years ago

juliengrouillet commented 8 years ago

WebPlotDigitizer returns NaN values for the attached log-scale horizontal bar chart. Plot type is set to 2D bar chart and the axes are calibrated using 0 and 10000 as the two reference points. Log scale is checked. Am I doing something wrong?

![plot](https://cloud.githubusercontent.com/assets/8081876/18268857/eac2547c-7425-11e6-963c-8a64deb9bee1.png ![water consumption 1]%28https://cloud.githubusercontent.com/assets/8081876/18268870/045787ea-7426-11e6-9a06-ea7d23fb7828.JPG%29)

Thanks for your help!

ankitrohatgi commented 8 years ago

I am not able to see the plot, but a log scale axis can never have a "0" value. Are you sure your scale isn't 1 to 10000?

Dutch-Piet commented 1 year ago

Hi - the same NaN issue occurred for me when digitizing data from a graph with a logarithmic Y-Axis. I have put the value for Y2 in as "1,000,000,000" resulting in NaN values in the data set. However, when "tweaking" the XY axis, I then put the Y2 Value in as "1000000000" (i.e. no comma's) and the issue resolved. Hope this helps.