http://imagej.273.s1.nabble.com/Calculating-distances-between-multiple-points-along-a-line-tp5018921p5018927.html
manipulate them".
I didn't write that is it’s somehow *unethical* or legitimate.
I perfectly agree that there are reasons to do so, e.g. for personal use
generated the plots and ask them for the numerical data.
> Hi Adrián,
>
> ImageJ has a tool for extracting data from line graphs:
> Analyze>Tools>Analyze Line Graph
>
>
https://imagej.nih.gov/ij/docs/guide/146-30.html#toc-Subsubsection-30.14.3>
> In my experience, it works best if you remove all axes etc. or put a
> rectangle around the data, well inside of the axes; it also helps to
> apply a threshold to the image (needed especially for plots that come
> from jpg-compressed figures like often seen in PDFs).
> Unfortunately, it does not accept the axis calibration with offset as
> you can set with Image>Adjust>Coordinates; and it has a bug that
> reverses the x axis in some cases (possibly related to y axis is
> calibration with y ascending in upwards direction.)
>
> [Concerning the point raised by Herbie - I consider it perfectly
> legitimate to extract data from other's work for some purposes, e.g. as
> a review of a manuscript for consistency checks, for a review article
> where you plot several sets of data that you can't get directly from the
> authors into one plot (with proper citations, etc. Of course, the
> purpose of this tool is NOT to steal data to present them as the own work!]
>
> Michael
> ________________________________________________________________
> On 19/06/2017 15:29, Adrián Villalba wrote:
>> Dear all,
>>
>> I have a graph (line graph) and i want to know he exact at the y-axis of
>> all the points of the graph. I think of tracing manually a line over the
>> line-graph. Then trace another line among the basal line of the x-axis
>> (the
>> zero in the y-axis) and then calculate the distance (in any unit, it does
>> not matter) between each point of the graph line and its parallel to the
>> basal line. It would give me the proportionality respect a reference
>> point
>> to know each value of the graph line.
>>
>> The fact is that when i try to do it on ImageJ, i can only do it manually
>> (which means a huge amount of time) do you know if there is any
>> choice/tool
>> to perform this calculation along the line-graph?
>
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