export some grid cell values as excel

[pvgenuchten]

either have a button or documentation on the option to export a subset of grid-pixels to a excel format

x-min	y-min	x-max	y-max	Clay	Silt	Sand
0.5	3.2	0.6	3.3	0.20	0.40	0.40
0.6	3.2	0.7	3.3	0.15	0.40	0.35