bullseye_plot           Outputs a circular bullseye plot for a gene
                        pair. The central circle is gene B in cells
                        expressing gene A. Rings indicate neighbors
                        with gene B, where the first ring is the first
                        neighbor.
bullseye_scores         Calculates bullseye statistics for ALL gene
                        pairs. Counts the number of cells with gene B
                        in those with gene A And in their neighbors
                        Neighbor scores are cumulative and normalized
                        by window size.
correlation             Computes Pearson's correlation between pairs of
                        columns. If one matrix is provided, the output
                        is the pairwise correlations between its
                        columns. If two matrices are provided, the
                        output is the pairwise correlations between
                        their columns.
cross_expression        Computes cross-expression and co-expression
                        p-values between all gene pairs.
cross_expression_correlation
                        Computes gene-gene correlations between
                        cross-expressing cell-neighbor pairs. Cell and
                        neighbor masks are used to consider mutually
                        exclusive expression per gene pair.
expression              Example gene expression matrix
get_cooccurrence_stats
                        Calculates the number of elements common
                        between columns of two matrices. This function
                        performs a simple dot product when binarize =
                        FALSE.
locations               Example cell location matrix
rotate_coordinates      This function takes x and y coordinates and
                        rotates them counterclockwise by the specified
                        number of degrees, and mean centers the points.
smooth_cells            Smooths cells' gene expression by averaging its
                        expression by the nearest neighbors. Optionally
                        computes genes by genes Pearson's correlation
                        matrix between cells by genes and neighbors by
                        genes matrices.
spatial_enrichment      Determines whether the supplied genes show
                        spatial enrichment in cross-expression. Spatial
                        enrichment can be interpreted as delineating
                        anatomical boundaries.
tissue_expression_plot
                        Plots gene expression and cross-expression on
                        tissue by coloring cells.
