http://imagej.273.s1.nabble.com/ij-gui-Plot-enhancement-request-tp3694518p3694522.html
> The trick is to call the contructor with two null double arrays. The
> following plugin allows listing of the data points.
>
> public class plot_test implements PlugIn {
>
> public void run(String arg) {
> if (IJ.versionLessThan("1.30c"))
> return;
>
> float[] x = {0.1f, 0.25f, 0.35f, 0.5f,
> 0.61f,0.7f,0.85f,0.89f,0.95f}; // x-coordinates
> float[] y = {2f,5.6f,7.4f,9f,9.4f,8.7f,6.3f,4.5f,1f}; //
> x-coordinates
>
> float[] x2 = {0f,1f};
> float[] y2 = {0f,1f};
>
> double[] a = null;
> double [] b =null;
>
> Plot plot = new Plot("Example Plot","X Axis","Y Axis",a,b);
> plot.setLimits(0, 1, 0, 10);
> plot.setLineWidth(2);
> plot.addPoints(x,y,PlotWindow.X);
> plot.addPoints(x2,y2,PlotWindow.LINE);
> plot.show();
> }
> }
>
>
> Jerome
>
>
> On Thu, Nov 13, 2008 at 11:41 AM, Michael Schmid
> <
[hidden email]>wrote:
>
>> Hi Woody,
>>
>> yes, I agree, the Plot class stores only one set of data, it is
>> the data
>> that you submit with the constructor. Everything that you add
>> later is
>> plotted (in the sequence that you add it) but not stored as data.
>> Finally,
>> with Plot.show() [or in a java program, plot.show()] the data
>> submitted with
>> the constructor are plotted with the current color and line type
>> settings,
>> but always as a line.
>> Plot.draw calls drawPolyline, not addPoints, so there is no way
>> out with
>> the current version of ImageJ (sorry, Jerome, your version won't
>> let you
>> list the data)
>>
>> It is not so clear what could be a good solution.
>>
>> - Storing all data and listing them in separate columns?
>> This has the disadvantage that auxiliary lines such as your
>> diagonal or a
>> horizontal line plotted to show the x axis (at y=0 for plots with
>> positive
>> and negative values) would generate extra data in the list.
>> Also, it might break existing macros or procedures relying on
>> getting only
>> one y column of data.
>>
>> - Adding a Plot.setShape(shape) method and calling addPoints
>> instead of
>> drawPolyline in Plot.draw?
>> This would perpetuate the counterintuitive problem that you have
>> to set the
>> shape, line width and color for the data passed in the constructor
>> after all
>> the other addPoints methods.
>>
>> - Passing shape, size/lineWidth and color of the initial data with
>> the
>> constructor?
>> This would add at least two very long constructors (for float and
>> double
>> arrays).
>>
>> public Plot(String title, String xLabel, String yLabel, double[]
>> xValues,
>> double[] yValues, int flags, int shape, int lineWidth, Color color)
>>
>> Also not extremely elegant...
>>
>> Any better idea?
>>
>> Michael
>> ________________________________________________________________
>>
>>
>> On 13 Nov 2008, at 08:14, Jerome Mutterer wrote:
>>
>> Unintuitively, the last serie added to a plot is drawn first. Add
>> the line
>>> reference after your data points, and the list button will list your
>>> points.
>>>
>>> Jerome.
>>>
>>> Plot.add("dots", x, y);
>>> Plot.add("line", newArray(0,x.length),newArray(0,y.length));
>>>
>>> On Thu, Nov 13, 2008 at 7:32 AM, Jeffrey B. Woodward <
>>>
[hidden email]> wrote:
>>>
>>> ImageJ'ers/Wayne,
>>>>
>>>> I am trying to use the ij.gui.Plot class to create a scatter plot.
>>>> Actually, the Plot contains both a scatter plot and a simple curve
>>>> (diagonal
>>>> line with points at [0,0] and [max,max]). The diagonal line is
>>>> just for a
>>>> visual reference; the real data points are what make up the
>>>> scatter plot.
>>>> The issue is that in doing this, I can't find a way for the user
>>>> to use
>>>> the
>>>> List button (or the Save button) to get a listing of the data
>>>> points.
>>>> This
>>>> is because the List/Save buttons seem only appear to operate on the
>>>> points
>>>> used in the constructor (in my case the endpoints of the reference
>>>> diagonal), but my data points for the scatter plot are added after
>>>> construction using the addPoints() method.
>>>>
>>>> My first thought was to supply my scatter plot points in the
>>>> constructor
>>>> and add the reference line with the addPoints() method; however,
>>>> I don't
>>>> see
>>>> any way to avoid drawing them as a polyline doing it this way --
>>>> I want a
>>>> scatter plot of those points, not a polyline!
>>>>
>>>> Hopefully I am missing something obvious in the API/source code,
>>>> but in
>>>> case if I am not, is this an enhancement that the ImageJ
>>>> community is
>>>> interested in? Should I take a crack at this myself, or is
>>>> somebody else
>>>> interested enough to do it?
>>>>
>>>> BTW: I suppose that there may be a hack/workaround for my specific
>>>> case...perhaps I could supply my points in the constructor drawn
>>>> with a
>>>> fully transparent color/invisible-ink, then add the points for my
>>>> reference
>>>> diagonal using the addPoints() method with a LINE shape and
>>>> appropriate
>>>> color, and lastly, add the scatter plot points [again] with the
>>>> addPoints()
>>>> method with a DOT shape and appropriate color. Seems ugly --
>>>> probably
>>>> doomed
>>>> to failure -- other suggestions/hacks/workarounds/free-therapy-
>>>> sessions
>>>> are
>>>> welcome.
>>>>
>>>> Many thanks,
>>>>
>>>> -Woody
>>>>
>>>>