2 votes
1 answer
55 views
How to use ak.Array with index arrays to create a custom masked output?I have these arrays in Awkward Array: my_indices = ak.Array([[0,1],[0],[1]]) my_dummy_arr = ak.Array([[1,1],[1,1],[1,1]]) I want to generate this result: [[1,1],[1,0],[0,1]] Basically, for each sub-...
asked May 28 at 10:52 Why np.vectorize doesn't work for awkward arrays?I have a simple vectorized function (actually my real case is more complicated), as: @np.vectorize def f(x): if x > 0: return 1 else: return -1 Why it is not working with ...
asked Mar 31 at 14:300 votes
0 answers
54 views
How to Slice An Awkward Array of Records by the Length of the Record ValueI'm new to posting questions on here and to using awkward arrays. Let me know if I should re-format my question or include more information. I am using awkward/2.6.7, awkward_cpp/37, jupyterlab==3.0....
asked Mar 20 at 0:152 votes
1 answer
129 views
How can I convert the datatype of a numpy array sourced from an awkward arrayI have a numpy array I converted from awkward array by to_numpy() function, and the resulting array has the datatype: dtype=[('phi', '<f8'), ('eta', '<f8')]). I want to make it a regular tuple ...
asked Nov 22, 2024 at 12:591 vote
2 answers
341 views
Accessing elements of an awkward array that are not a passed-in indexI'm trying to access the elements of an awkward array that do not correspond to some particular set of indices. I have 3 events in total with one jet per event and some number of leptons. Each lepton ...
asked Jun 22, 2024 at 23:021 vote
0 answers
107 views
Awkward Array broadcasting and linear indexing, reshaping an Awkward ArrayI'm trying to use numpy-like syntax on an awkward.Array with variable sizes in the second dimension, but it's still confusing.. In numpy i have normals.shape # (N,3) idcs.shape # (m,k) normals[idcs]...
asked Jun 17, 2024 at 14:49 Slicing MultiIndex pandas DataframeI am working with awkward arrays and dumping information to pandas dataframe with multiindex: >>> import awkward as ak >>> import pandas as pd >>> ak_arr = ak.Array([ ... ...
asked Apr 22, 2024 at 11:062 votes
2 answers
330 views
Converting from awkward arrays into torch arraysNote: I am using awkward version 1.10.3. So, the general overview is that I have a set of data that is in awkward arrays, and I want to be able to pass this data to a simple feedforward pytorch model. ...
asked Mar 22, 2024 at 11:11 How to lazily read from parquet with awkward2I'm thinking of migrating from awkward 1 to 2. I used lazy reading from parquet file using awkward1. tree = ak.from_parquet(filename, lazy=True) # data is not read print(np.max(tree["x"]),...
asked Mar 1, 2024 at 15:001 vote
1 answer
371 views
AttributeError: module 'awkward' has no attribute 'util'Here is the code import pandas as pd import numpy as np import awkward import uproot_methods The version of pandas is 2.1.1, and the version of numpy is 1.23.1, and the version of awkward is 0.9.0, ...
asked Sep 28, 2023 at 10:06-1 votes
1 answer
102 views
Module 'awkward' has no attribute 'load'The problem poped up when I try to use function awkward.load(), but there comes the message "module 'awkward' has no attribute 'load'", and I think the problem is that the newest version of ...
asked Sep 27, 2023 at 1:181 vote
0 answers
148 views
Saving concatenated Awkward-Arrays with Different FieldsSo I have been working with some data that includes both electrons and muons. Now for this we have to find opposite-sign same-flavour dilepton pairs, i.e. e+e- or mu+mu-. However, I run into problems ...
asked Sep 8, 2023 at 13:57 To_parquet giving error: __arrow_array__() got an unexpected keyword argument 'type'I'm reading a root file using uproot and converting parts of it into a DataFrame using the arrays method. This works fine, until I try to save to parquet using the to_parquet method on the dataframe. ...
asked Aug 11, 2023 at 11:351 vote
0 answers
176 views
Using `awkward` array to keep track of two different combinations of particlesI'm building on a previous question about the best way to use awkward efficiently with combinations of particles. Suppose I have a final state of 4 muons and my hypothesis is that these come from some ...
asked Jul 28, 2023 at 18:400 votes
2 answers
439 views
Adding first, second, etc element of an awkward array togetherI am very new to awkward arrays (and python in general) and just want to know how I could add the first elements of each array in an ak.array together. E.g my_array = [[1,2,3], [4,5,6], [7,8,9].....] ...
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