plot_spatial_expression: Plot spatial gene expressions
In lambdamoses/novoSpaRc: Spatial Reconstruction of Tissues from scRNA-seq Data

This function can be used to plot expression of one or more genes in spatial locations. This function can be used to visualize predictions from this package, and gene expression in general as well if locations are known. Plotly-based interactive graphics can be generated, but by default, ggplot2 will be used.

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plot_spatial_expression(gene_expressions, locations, symmetry,
  transposed = FALSE, interactive = FALSE, n_col = 2, pt_size = 1,
  alpha = 1)

`gene_expressions`	Numeric vector or matrix with genes in rows and locations in columns. Matrices with genes in columns instead are also permitted, with `transposed = TRUE`.
`locations`	Data frame or numeric matrix with 1 to 3 columns specifying locations, assumed to have x in the first column, y in the second, and z in the 3rd.
`symmetry`	A string for the column name in `locations` that specifies an axis about which symmetry is present. This is useful if due to symmetry, only half of the locations are in `locations` as the other half would be the same anyway. However, if all locations are present in `locations` even though the actual tissue does have symmetry, this argument can be left missing.
`transposed`	Logical, whether the matrix in `gene_expressions` has genes in columns and locations in rows. Defaults to `FALSE`.
`interactive`	Logical, whether the plot returned should be interactive. If `TRUE`, then a Plotly-based html widget will be returned. Otherwise a `ggplot` object. Defaults to `FALSE`. When there are 3 columns in `locations`, this argument will be ignored and an interactive plot will always be returned.
`n_col`	Number of columns in multi-faceted plot when multiple genes are plotted at once.
`pt_size`	Numeric, point size.
`alpha`	Numeric, transparency of points.