ovrlpy.sample_expression_at_xy
==============================

.. py:function:: ovrlpy.sample_expression_at_xy(df, sampling_points_x, sampling_points_y, genes=None, KDE_bandwidth=1, min_expression = 0)

   Returns a matrix of gene expression vectors at each local maximum.

   :param df: A dataframe of coordinates that will be sampled for gene expression.
   :type df: pandas.DataFrame
   :param sampling_points_x: x-coordinates to sample gene expression at.
   :type sampling_points_x: list
   :param sampling_points_y: y-coordinates to sample gene expression at.
   :type sampling_points_y: list
   :param genes: list of genes to sample expression for.
                 Defaults to all genes in the dataframe.
   :type genes: list, optional
   :param KDE_bandwidth: Bandwidth of the Gaussian smoothing function used during the KDE.
   :type KDE_bandwidth: float, optional
   :param min_expression: A minimal expression threshold to report as local maximum regions of interest.
   :type min_expression: float, optional

   :rtype: pandas.DataFrame