Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Extract data from a plot image
ResourceFunction["ExtractPlotImageData"][img] converts the plot image img to a normalized set of points. | |
ResourceFunction["ExtractPlotImageData"][img,{xscale,yscale}] scales the results by xscale and yscale. |
Extract data from a plot image:
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An x-Ray diffraction (XRD) pattern of low-density polyethylene (LDPE) converted to a list of points:
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Create a Sin plot:
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Convert the plot into a list of points such that the points are rescaled:
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You can use ExtractPlotImageData on data consisting of points:
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The x- and y-scales can be arbitrarily manipulated. Take for example this UV-Vis spectroscopy graph of ZnO nanoparticles:
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The extracted data can be interpolated:
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On sets of points, FindFormula can be used to detect what relationship is found in the data:
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Content in the image other than the curve is treated as data. Here, the "(a)" distorts the average pixel height:
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