Turn one-lined 2D Numpy Array (1,x) into 1D Array (1,)
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im trying to plot a histogram with matplotlib.
Therefore, i need to convert my one-line 2D Array (e.g. (1,4) - 2D - [[1,2,3,4]]) into a 1D Array (e.g. (1,) - 1D -[1,2,3,4]). How can i do this?

Thanks. 