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POHow can I average an array of arrays in python?
 

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  1. POHow can I average an array of arrays in python?
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    <p>I have a simulation that runs over many times. Each time an array is produced and I insert it into a larger array keeping track of all the data. for example </p> <pre><code>record = [] for i in range(2): r = random.random() array = numpy.arange(20)*r array.shape = (10,2) record.append(array) record = numpy.array(record) </code></pre> <p>which produces:</p> <pre><code>[[[ 0. 0.88765927] [ 1.77531855 2.66297782] [ 3.55063709 4.43829637] [ 5.32595564 6.21361492] [ 7.10127419 7.98893346] [ 8.87659274 9.76425201] [ 10.65191128 11.53957056] [ 12.42722983 13.3148891 ] [ 14.20254838 15.09020765] [ 15.97786693 16.8655262 ]] [[ 0. 0.31394919] [ 0.62789839 0.94184758] [ 1.25579677 1.56974596] [ 1.88369516 2.19764435] [ 2.51159354 2.82554274] [ 3.13949193 3.45344112] [ 3.76739031 4.08133951] [ 4.3952887 4.70923789] [ 5.02318709 5.33713628] [ 5.65108547 5.96503466]]] </code></pre> <p>Since each <code>array</code> represents a simulation in my program. I would like to average the 2 different arrays contained within <code>record</code>. </p> <p>basically I would like an array with the same dimensions as <code>array</code> but it would be an average of all the individual runs. </p> <p>I could obviously just loop over the arrays but there is a lot of data in my actual simulations so I think it would be very costly on time </p> <p>example out put (obviously it wouldn't be zero):</p> <pre><code>average = [[0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0] [0.0, 0.0]] </code></pre>
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      1. POHow can I average an array of arrays in python?
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    1. COAre you sure `numpy.average(record, axis=0)` doesn't do what you want? That has the same dimension as `array`, and each entry is the average of the corresponding entry from the 10 simulations.
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      1. POHow can I average an array of arrays in python?
      1. USWarren Weckesser
    2. CO`record.mean(axis=0)` would also work.
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      1. POHow can I average an array of arrays in python?
      1. USWarren Weckesser
    3. CO@WarrenWeckesser -- I think you should add it as an answer...
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      1. USroot
 

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