According to the documentation, writecell accepts 'Range' arguments of the following forms:
- 'Corner1', where Corner1 specifies the first cell of the region to write. The writing function writes the data starting at this cell. Example: 'Range','D2'
- 'Corner1:Corner2', where Corner1 and Corner2 are two opposing corners that define the region to write. For example, 'D2:H4' represents the 3-by-5 rectangular region between the two corners D2 and H4 on the worksheet. The 'Range' name-value pair argument is not case sensitive, and uses Excel A1 reference style (see Excel help). Example: 'Range','D2:H4'
Whereas readcell accepts those forms and others, including [r1 c1 r2 c2].
