amaxlocx()
This function returns the X location of maximum grid value over a spatial domain. The syntax is:
amaxlocx(expr, xdim1, xdim2, ydim1, ydim2)
where:
expr
any valid grads grid expression
xdim1
starting X or LON dimension expression
xdim2
ending X or LON dimension expression
ydim1
starting Y or LAT dimension expression
ydim2
ending Y or LAT dimension expression
For the X location of the global maximum, a shorthand may be used:
amaxlocx(expr, global)
or
amaxlocx(expr, g)
is the same as
amaxlocx(expr, lon=0, lon=360, lat=-90, lat=90)
Usage Notes
- This function will only work with grads version 2.0.2 or later.
-
This function is more efficient that using nested
maxloc
andmax
functions. -
Related function
amaxlocy
will return the Y location of the maximum grid value. -
Use the
amax
function to retrieve the maximum value over the grid. - If more than one grid box contains the maximum value, the location returned will be the first one encountered as the grid is scanned. The grid is scanned by rows from south to north, and each row is scanned from west to east.
-
A similar set of functions exists for finding the minimum over an area:
amin
,aminlocx
, andaminlocy
.