There a function for this, but it is note used a lot.

Here the doc string:

def ResultsToXY(sets,x,y,foreach=[]):
    """ combines observable x and y to build a list of DataSet with y vs x
 
    this function is used to collect data from a hierarchy of DataSet objects, to prepare plots or evaluation.
    the inner-most list has to contain one DataSet with props['observable'] = x and one props['observable'] = y,
    this will be the pair x-y used in the collection.

    The parameters are:
      sets:    hierarchy of datasets where the inner-most list must contain to pair x-y
      x:       the name of the observable to be used as x-value of the collected results 
      y:       the name of the observable to be used as y-value of the collected results 
      foreach: an optional list of properties used for grouping the results. A separate DataSet object is created for each unique set of values of the specified parameers.

    The function returns a list of DataSet objects.
    """


Best,
Michele


On 28 Mar 2017, at 15:23, Dominik Schildknecht <dominik.schildknecht@psi.ch> wrote:

Dear all,
I wanted to know if it's already implemented to plot two observables
against each other with the combination of pyalps.collectXY and
pyalps.plot.plot.
As an example I would like to be able to plot energy vs. magnetization
in an example like MC-07. This mainly arises as a question if I want to
use the exchange Monte Carlo formalism (thanks for that, it seems to
work great with very little modification to my code). There the
optimized temperature set is saved as an observable. If I still want to
be able to plot M vs. T I would need the ability to plot two observables
against each other. However it crashes in alps/lib/pyalps/tools.py in
the function collectXY at the line
   xvalue = np.array([data.props[x] for i in range(len(data.y))])
Is what I intend to do possible with collectXY?
Best,
Dominik

--
Paul Scherrer Institut
Dominik Schildknecht
PhD Student
WHGA/129
CH-5232 Villigen-PSI
Phone: +41 56 310 55 68



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