The reason is that you typically get many datasets when loading results and the calls thus return a list
On 26 Sep 2015, at 15:22, Huaiming Guo hmguo@buaa.edu.cn wrote:
Dear Michele, Thank you very much. It works now. I am a bit curious why [0] should be added. It is hard to figure it out.
Sincerely, Huaiming Guo
发件人: comp-phys-alps-users-bounces@lists.phys.ethz.ch [mailto:comp-phys-alps-users-bounces@lists.phys.ethz.ch] 代表 Michele Dolfi 发送时间: 2015年9月26日 20:34 收件人: comp-phys-alps-users@lists.phys.ethz.ch 主题: Re: [ALPS-users] About the class DataSet
Dear Huaiming,
From the “[“ at the beginning of your output, I think that your magnetization variable is a list of DataSet objects. (maybe a list with only one entry) This is quite common in pyalps, since most functions operate on list of datasets, and return list of datasets.
To access the data the following should work: magnetization[0].x magnetization[0].y
Regards, Michele
-- ETH Zurich Michele Dolfi Institute for Theoretical Physics HIT G 32.4 Wolfgang-Pauli-Str. 27 8093 Zurich Switzerland
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On 26 Sep 2015, at 08:05, Huaiming Guo <hmguo@buaa.edu.cn mailto:hmguo@buaa.edu.cn> wrote:
Dear All, I have a question about the dataset class. Suppose I have a variable “magnetization” in class dataset (see below). I prefer the data form as the following, X(1), y(1) X(2), y(2)…. I want to know how I use the x of magnetization. I tried magnetization.x or magnetization.y, but it does not give me results. Many thanks for the reply.
Sincerely, Huaiming
class DataSet(ResultProperties):
magnetization [x=[ 0. 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1. 1.2 1.4 1.6 1.8 2. 2.2 2.4 2.5] y=[0.000125981483652 +/- 0.000122322506977 0.00860528601563 +/- 0.000365690783567 0.0222620599739 +/- 0.00089047889358 0.0370211267606 +/- 0.000570927849528 0.048406793936 +/- 0.000429342486559 0.0584663763909 +/- 0.0004796634673 0.0728869134363 +/- 0.000659369158556 0.0893286949981 +/- 0.000587776900735 0.101889483066 +/- 0.000593519471563 0.1160502693 +/- 0.000825142408233 0.133805849632 +/- 0.00057575130612 0.165816585036 +/- 0.000469748080503 0.208087821355 +/- 0.000521162407847 0.258726150393 +/- 0.000553055778572 0.331226556639 +/- 0.000601625820527 0.434736729908 +/- 0.000675053120055 0.491099090239 +/- 0.0003387686197 0.499313131313 +/- 8.51581569713e-05 0.499728317659 +/- 5.31002968192e-05] props={'observable': 'Magnetization Density', 'local_S': 0.5, 'THERMALIZATION': 100.0, 'J': 1.0, 'SWEEPS': 100.0, 'L': 20.0, 'LATTICE': 'chain lattice', 'hdf5_p ath': '/simulation/results/Magnetization Density', 'xlabel': 'h', 'T': 0.08, 'yl abel': 'Magnetization Density', 'MODEL': 'spin', 'label': ''}]