http://imagej.273.s1.nabble.com/ij-gui-Plot-enhancement-request-tp3694518p3694523.html
Thank you Jerome and Michael for your help on this one. I missed those
> Hi Jerome,
>
> you are right!
>
> Sorry, I had overlooked the last few lines of Plot.addPoints
> responsible for this feature so I thought it was impossible.
>
> Michael
> ________________________________________________________________
>
> On 13 Nov 2008, at 14:44, Jerome Mutterer wrote:
>
>> 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
>>>>>
>>>>>
>
>