RAnEnExtra::pixelsFromXs convert x and y to pixel index
pixelsFromXs(x, y, xgrids.total, start)
| x | a vector of x coordinates of the pixels starting from 1 |
|---|---|
| y | a vector of y coordinates of the pixels starting from 1 |
| xgrids.total | total number of x. |
| start | the counting start of pixels. |
the index of the pixel
convert x and y coordinates index to pixels index. Assume that x and y coordinates index are counting from 1. Pixels start counting from the argument start, and they are counted row-wise.