This function allows to split a roi into different subrois for a pixel-based analysis.
splitROI(roi.data, nsplit, names=NULL)A names list of length = nsplit and where each element has the same structure as a roi.data extracted by DrawROI.
An object with roi data as in output from DrawROI() function
The number of sub-rois in which your ROI must be divided into
Optional names for roi. If omitted rois will be progressively numbered (i.e, roi1, roi2, roi3, etc.)
Gianluca Filippa <gian.filippa@gmail.com>
This function allows to split a large ROI into smaller ones. This is needed to make computationally
feasible the pixel-based analysis with large ROIs and/or high resolution images. As a general indication,
approx 10000 pixels per sub-ROI is the upper limit for a computationally feasible spatial analysis,
so set nsplit argument accordingly. The number of pixels in a ROI essentially controls the dimension of the VI.data
object you generate with extractVIs function. A large VI.data object (typically larger than 200 Mb) will fast
saturate your RAM and slow down the spatial analysis.