.. meta::
    :description: Code snippets extract Numpy array channel getNDArray

How to extract a Numpy Array from a Channel
===========================================

In this example we access the Channel numpy array.


First create a example channel::

    from ORSModel import Channel
    channel = Channel()
    #set it sizes, since we use the default voxel size, the channel is for now 100 meter cube
    channel.setXYZTSize(100,100,100,1)
    channel.setXSpacing(0.01)
    channel.setYSpacing(0.01)
    channel.setZSpacing(0.01)
    #now the channel is 1 meter cube
    #initilize it for float32 data
    channel.initializeDataForFLOAT()
    #publish it so that it is visible in the Object properties list
    channel.publish()

And access it NDArray::

    array = channel.getNDArray()
    #modify it data
    array[::2,::2,::2] = 1
    #tell the channel that it data was modified (this can trigger event)
    channel.setDataDirty()