day_length_matrix.RdCompute a matrix of monthly average day length
day_length_matrix(year, month, extent, nrows, ncols)
| year | year for computation. Must be >= 1900 |
|---|---|
| month | month for computation |
| extent | vector of |
| nrows | number of rows (latitudes) in generated matrix |
| ncols | number of columns (longitudes) in generated matrix |
a matrix of specified dimensions, where each cell represents the day length as a fraction of 24 hours