Function to save pheatmaps to disk while showing them on screen

pheatmap::pheatmap accepts a parameter called filename which saves the pheatmap to disk. However, then the heatmap is not shown on screen. This function is a workaround to show the heatmap on screen and save it to disk.

Usage

save_pheatmap(x, filename, dev = png, width = 2000, height = 2000, res = 150)

Arguments

filename: the output file path. The page number is substituted if a C integer format is included in the character string, as in the default. (Depending on the platform, the result should be less than PATH_MAX characters long, and may be truncated if not. See postscript for further details.) Tilde expansion is performed where supported by the platform. An input with a marked encoding is converted to the native encoding on an error is given.
dev: name of the device to save the pheatmap. e.g. "png" or "pdf"
width: the width of the device.
height: the height of the device.
res: The nominal resolution in ppi which will be recorded in the bitmap file, if a positive integer. Also used for units other than the default, and to convert points to pixels.