Common grads Functions

Grads functions are classified into two types,

The first type is the calculation of lattice/site data, which is called an analysis function;

Another type is used in Script Programming (GS). The latter type is called a script function.

The first type of analysis function is divided into two sub-classes: lattice analysis and site analysis:

1) lattice Analysis

Absolute Value ABS (expr)

Cosine/arccosine cos (expr) ACOs (expr)

SINE/arcsin (expr) asin (expr)

Tangent/arc tangent Tan (expr) atan2 (expr1, expr2) [expr1/expr2]

Exponential exp (expr)

Log (expr) log10 (expr)

Power Function POW (expr1, expr2) expr1expr2

String Length of the right triangle/Full wind speed MAG (u_expr, v_expr) SQRT (u * u + V * V)

Square Root SQRT (expr)

Weighted/unweighted average ave (expr, dim_expr1, dim_expr2, tincr, {|-B}) mean ()

Weighted/unweighted region average aave (expr, {xdim1, xdim2, ydim1, ydim2 | global | G}) amean ()

Average tmave (undefine_or_weight_expr, expr, texpr1, texpr2)

Weighted/unweighted regions and asum (expr, {xdim1, xdim2, ydim1, ydim2 | global | G}) asumg ()

Weighted vertical integral (ps_expr, expr, top)

Common Point Gint (expr)

Max (expr, dim1, dim2, tincr) min ()

Maxloc (expr, dim1, dim2, tincr) minloc ()

Spatial correlation/regression scorr (expr1, expr2, {xdim1, xdim2, ydim1, ydim2 | global | G}) sregr ()

Time Correlation/regression tcorr (expr1, expr2, tdim1, tdim2) tregr ()

Constant const (expr, const, {|-u |-})

Remove maskout (expr, mask_expr)

Hop point SKIP (expr, skip_x, skip_y)

Weighted 9-Point Smoothing smth9 (expr) 1-D 3-Point Smoothing

Central difference cdiff (expr, dim)

Time loop tloop (expr)

Extreme Value position maxloc (expr, dim1, dim2, tincr) minloc ()

Feature value position findlvl (expr, expr_to_find, lev1, lev2)

Functions of physical quantity calculation in meteorology:

Virtual temperature, relative humidity ratio wet tvrh2q (TV _expr, rh_expr) g/g

Virtual temperature, relative humidity temperature tvrh2t (TV _expr, rh_expr) degk

Vertical Vortex hcurl (u_expr, v_expr)

Central difference calculation horizontal divergence hdivg (expr1, expr2)

Full wind speed MAG (u_expr, v_expr)

2) site analysis

Insert from grid point to site gr2stn (grid_expr, {stn_expr | Lon, lat},-)

Collect and generate the lattice field coll2gr (cnum, {num |-u })

Cressman interpolation oacres (grid_expr, stn_expr, radii, 1st_guess)

Grid average oabin (grid_expr, stn_expr, {-f |-c })

Time average stnave (expr, dexpr1, dexpr2,-M count)

Minimum value of time series stnmin (expr, dexpr1, dexpr2,-M count)

Maximum value of time series stnmax (expr, dexpr1, dexpr2,-M count)

Convert to 1-D lattice sequence s2g1d (expr)

All mathematical functions abs, cos, ACOs, sin, asin, tan, atan2, exp, log, log10, pow, Mag, SQRT

Second, script functions include:

Abs, log, log10: math_abs, math_log, math_log10

Sin, cos, Tan: math_sin, math_cos, math_tan

Asin, ACOs, atan2: math_asin, math_acos, math_atan

Math_sinh, math_cosh, math_tanh

Math_asinh, math_acsh, math_atanh

Pow, SQRT: math_pow, math_sqrt, math_exp

Integer: math_nint, math_int

Remainder: math_fmod, math_mod

String processing functions: math_strlen, valnum, wrdpos, strlen

Sublin, subwrd, substr

Numeric format conversion function: math_format

File operation functions: read, write, close

Common grads Functions