NCL Index

NCL Function	Description	Python Equivalent	Notes
abs	Returns the absolute value of numeric data	abs() or numpy.abs()	example notebook
avg	Computes the average of a variable regardless of dimensionality	numpy.average() or numpy.mean()	example notebook
asin	Computes the inverse sine of numeric types	math.asin() or numpy.arcsin()	example notebook
acos	Computes the inverse cosine of numeric types	math.acos() or numpy.arccos()	example notebook
atan	Computes the inverse cosine of numeric types	math.atan() or numpy.arctan()	example notebook
atan2	Computes the inverse tangent of (y/x) for numeric types	math.atan2() or numpy.arctan2()	example notebook
area_poly_sphere	Calculates the area enclosed by an arbitrary polygon on the sphere	pyproj.Geod() and shapely.geometry.polygon.Polygon()	example notebook
cumsum	Calculates the cumulative sum	numpy.cumsum()	example notebook
clmMonTLL	Calculates long-term monthly means (monthly climatology) from monthly data	xarray.DataArray.groupby()	example notebook
clmDayTLL	Calculates long-term daily means (daily climatology) from daily data	xarray.DataArray.groupby()	example notebook
calcMonAnomTLL	Calculates monthly anomalies by subtracting the long-term mean from each point	xarray.DataArray.groupby()	example notebook
calcDayAnomTLL	Calculates daily anomalies from a daily data climatology	xarray.DataArray.groupby()	example notebook
ceil	Returns the smallest integral value greater than or equal to each input value	math.ceil() or numpy.ceil()	example notebook
cosh	Computes the hyperbolic cosine of numeric types	math.cosh() or numpy.cosh()	example notebook
css2c	Converts spherical coordinates (lat/lon) to Cartesian coordinates on a unit sphere	astropy.UnitSphericalRepresentation()	example notebook
cos	Computes the cosine of numeric types	math.cos() or numpy.cos()	example notebook
days_in_month	Calculates the number of days in a month given month and year	cftime.datetime()	example notebook
dewtemp_trh	Calculates the dew point temperature given temperature and relative humidity	geocat.comp.dewtemp()	example notebook
daylight_fao56	Compute maximum number of daylight hours as described in FAO 56	geocat.comp.meteorology.max_daylight()	example notebook
decimalPlaces	Truncates or rounds to the number of decimal places specified	round() or numpy.round()	example notebook
day_of_week	Calculates the day of the week given month, day, and year	cftime.datetime()	example notebook
exp	Computes the value of e (the base of natural logarithms) raised to the power of the input	math.exp() or numpy.exp()	example notebook
fabs	Returns the absolute value of numeric data	abs() or numpy.abs()	example notebook
floor	Returns the largest integral value less than or equal to each input value	math.floor() or numpy.floor()	example notebook
get_pi	Return pi as a type float or double	math.pi or numpy.pi	example notebook
get_d2r	Return a constant that converts degrees to radians	math.pi / 180 or numpy.pi / 180 or numpy.deg2rad()	example notebook
get_r2d	Return a constant that converts radians to degrees	180 / math.pi or 180 / numpy.pi or numpy.rad2deg()	example notebook
log	Computes the natural log of a numeric type	math.log() or numpy.log()	example notebook
log10	Computes the log base 10 of a numeric type	math.log10() or numpy.log10()	example notebook
mod	Remainder function which emulates the Fortran ‘mod’ intrinsic function	% or numpy.mod()	example notebook
month_to_season	Computes a user-specified three-month seasonal mean	geocat.comp.month_to_season()	example notebook
max	Computes the maximum value of a multi-dimensional array	max() or numpy.max()	example notebook
min	Computes the minimum value of a multi-dimensional array	min() or numpy.min()	example notebook
product	Computes the product of the input	math.prod() or numpy.prod()	example notebook
qsort	Sorts a singly dimensioned array of numbers	sorted() or numpy.sort()	example notebook
rmMonAnnCycTLL	Removes the annual cycle from monthly data	xarray.DataArray.groupby()	example notebook
round	Rounds a float or double variable to the nearest whole number	round() or numpy.round()	example notebook
sign_matlab	Mimic the behavior of Matlab’s sign function	numpy.sign()	example notebook
sqrt	Computes the square root of its input	math.sqrt() or numpy.sqrt()	example notebook
sin	Computes the sine of numeric types	math.sin() or numpy.sin()	example notebook
specxy_anal	Calculates the cross-spectra quantities of a series.	scipy.signal.periodogram(), scipy.signal.convolve(), scipy.signal.csd(), scipy.signal.coherence()	example notebook
specx_anal	Calculates the spectra of a series.	scipy.signal.periodogram(), scipy.signal.convolve()	example notebook
sum	Sums the input	sum() or numpy.sum()	example notebook
satvpr_temp_fao56	Compute saturation vapor pressure using temperature as described in FAO 56	geocat.comp.saturation_vapor_pressure()	example notebook
stdMonTLL	Calculates standard deviations of monthly means	xarray.DataArray.groupby()	example notebook
sinh	Computes the hyperbolic sine of numeric types	math.sinh() or numpy.sinh()	example notebook
sqsort	Sorts a singly dimensioned arrays of strings	sorted() or numpy.sort()	example notebook
satvpr_tdew_fao56	Compute actual saturation vapor pressure as described in FAO 56	geocat.comp.actual_saturation_vapor_pressure()	example notebook
tanh	Computes the hyperbolic tangent of numeric types	math.tanh() or numpy.tanh()	example notebook
tan	Computes the tangent of numeric types	math.tan() or numpy.tan()	example notebook

Note

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