| 2xtoNaN8 | Changes missing_values into NaNs. Uses either missing_value or valid_range flags. Outputs are both real*4 or both real*8. |
| abrat | Ratio of alpha to beta |
| abs | Returns the absolute value of a variable or a constant |
| add | Adds the last two items on the stack |
| add_variable | adds a variable to a dataset |
| addGRID | Adds a single-valued independent variable |
| addGRIDlast | Adds a single-valued independent variable as the slowest-varying independent variable |
| average | Calculates the average |
| beta | |
| BofA=C | Converts a variable A to a variable B using a table B(C=A) and linear interpolation. Out of range values beyond half a grid step are NaN |
| BofA=C-bounded | Converts a variable A to a variable B using a table B(C=A) and linear interpolation. Out of range values are pegged to the extreme values |
| boxAverage | Calcuates the box average. Commonly used for creating seasonal averages. Note: function should only be used with continuous data domain (see example below). |
| :c | Defines a numeric constant with units and (optionally) other attributes |
| changetruncation | Changes variable truncations to nsp |
| classify | Classifies data into categories, i.e. labels ranges of values. |
| CofA=B | Converts a variable A to a variable B using a table B(C) and linear interpolation. Out of range values beyond half a grid step are NaN |
| CofA=Bbounded | Converts a variable A to a variable B using a table B(C) and linear interpolation. Out of range values are pegged to the extreme values |
| constantdata | Returns constant data |
| correlate | Calculates the Pearson Product-Moment Correlation coefficient of two variables over specified grids (i.e., independent variables) |
| cos | Calculates the cosine of a number or variable (given in radians) |
| cosd | Calculates the cosine of a number or variable (given in degrees) |
| :cressman | Performs a cressman objective analysis to create gridded data from station data |
| datarank | Ranks data over a selected independent variable(s) |
| definite-integral | Returns integral evaluated between two limits |
| dekadalAverage | converts daily data to dekadal by averaging |
| dens | Unecso '81 density (insitu) of seawater |
| densa | Unecso '81 density (insitu) of seawater minus 1 |
| depth | Depth from pressure, ignoring density anomaly |
| detrend-bfl | detrends with a best-fit-line |
| differences | Calculates pairwise differences along specified grid(s) |
| distrib | Gives the distributions of values for a given variable d(x,y,z,t) by returning a new variable f(d) which gives the number of occurrences of data points nearest the values d_i which are equally spaced from min to max in steps of step |
| distrib1D | Returns the frequency distribution of a set of data for a specified range and step interval. Commonly used to create histograms. |
| distrib2D | Returns bivariate counts |
| div | Divides the last two items on the stack. |
| dominant_class | returns class with the highest weight |
| eexp | Calculates base e to the power of a variable or constant |
| eigenvalues | Calulates eigenvalues of a matrix |
| eigrs | Computes eigenvalues and eigenvectors, returns low to high (but indexes the hightest one as 1 |
| evengridAverage | Regrids a variable to a new grid by averaging |
| Explicit:endLoop | Ends an explicit integration loop |
| FillNaN | Modifies a variable so that if it has a missing data flag the missing data is filled in. |
| flagge | Flags data values greater than or equal to a specified threshold |
| flaggt | Flags data values greater than a specified threshold |
| flagle | Flags data values less than and equal to a specified threshold |
| flaglt | Flags data values less than a specified threshold |
| Fourier_transform | Computes fouriertransform |
| gaussianinv | Converts random data uniformly distributed on to gaussian data |
| gaussiantlat | Returns gaussian grid with n points |
| gautotsp | Converts lon/lat to spectral coefficients |
| gautotspUV | Converts lon/lat to spectral coefficients using spectral harmonics for velocity |
| georect | Defines a lat/lon rectangle |
| ginverse | Computes the (transposed) generalized inverse with the ivar1 grids as the first dimentsion of the matrix and the ivar2 grids as the second dimension of the matrix |
| GRID | Regrids a variable onto a newly-defined, evenly-spaced grid (i.e., independent variable) |
| gridtomatch | Returns variable1 regridded to match variable2 |
| gridtomatchnamed | |
| grouptogrid | combines variables into a single variable |
| integral | Takes integral with respect to independent variable |
| integrate | Takes integral with respect to independent variable starting with initial value |
| integrateddistrib1D | Returns the cumulative frequency distribution of a set of data for a specified range and step interval. |
| integrateddistrib2D | Computes the normalized distribution and then integates it, thus the values will range from zero to one. The variable is marked so that contours will be at 66\% and 96\% widths as well as at the median. |
| invertontogrid | Inverts onto surfaces |
| invlaplacian | Applies inverse laplacian to variable in spectral coordinates |
| isolines | Computes isolines from a gridded dataset. Should be changed to output a geometry |
| k-means136 | K-means cluster analysis using AS 136 seeded with varimax structures, see APPL. STATIST. (1979) VOL.28, NO.1 |
| L4cycle:endLoop | Ends a Lorenz 4-cycle scheme integration loop |
| laggedcovariance | Computes lagged covariance $C(E,E,S,L)$. If Tgrid is a variable, uses the first grid as the time grid |
| laplacian | Applies Laplacian to variable in spectral coordinates |
| ln | Calculates the natural log of a number or variable |
| lnratios | Takes pairwise ln ratios along grid of variable |
| log | Calculates the logarithm of a number or variable, with base 10 |
| mag | Calculates the vector magnitude |
| maskbybin | Bins data into bins from lo to high by step, returning a mask with an additional grid (the bins) that is either NaN or 1 |
| maskge | Masks out data values greater than or equal to a specified threshold |
| maskgt | Masks out data values greater than a specified threshold |
| maskle | Masks out data values less than or equal to a specified threshold |
| masklt | Masks out data values less than a specified threshold |
| masknotrange | Masks out all values of a variable not included in the indicated range. Commonly used to select stations within a particular lat/lon range (see Live Example). |
| maskrange | Masks out all values of a variable included in the indicated range. |
| matchtruncation | Changes second variable to match truncation of the first |
| matrixinverse | Calculates matrix inverse of variable using the first array of independent variables as the first dimension and the second array of independent variables for the second dimension. At the moment, assumes the matrix is compressed symmetric |
| max | Returns the maximum of two variables or two numbers |
| maxover | Returns the maximum value of a variable over a selected grid(s) |
| meansqover | Changes second stream to match truncation of the first |
| median | Computes the median |
| medianover | Calculates the median value (i.e., 50th percentile) of a variable over selected grids (i.e., independent variables) |
| min | Returns the minimum of two variables or two numbers |
| minover | Returns the minimum value of a variable over a selected grid(s) |
| mod | Returns the modulus of two variables or two numbers |
| monthlyAverage | Converts daily data to monthly data by averaging |
| mul | Multiplies the last two items on the stack. |
| mulavg | Multiplies and averages over a set of independent variables |
| mulsum | Returns A*B multiplied and summed along independent variables. If independent variable is an array of independent variables, sums over all of them |
| normalize | Divides var1 by var2. Points less than minimum in var2 become NaN in the output |
| normalizeddistrib1D | Returns the normalized frequency distribution of a set of data for a specified range and step interval. |
| normalizeddistrib2D | Computes the distribution of A vs B (see distrib2D) and then renormalizes by the integral along B. This new variable has the property that the integral along B is 1 |
| openquery | Opens a query |
| openqueryby | Opens a query indexed by indexvar |
| pairsums | Pairwise sums along independent variable of variable. This is the variable equivalent of integralgrid |
| partial | Takes partial derivative of variable along grid |
| partialeast | Applies zonal derivative to variable in spectral coordinates |
| partialnorth | Applies meridional derivative to variable in spectral coordinates |
| pentadAverage | Converts daily data to pentad (i.e., five-day) data by averaging |
| percentileover | Replaces data values with their percentile, based on non-parametric methods. |
| potemp | Calculates the potential temperature |
| pressure | Computes hydrostatic pressure by integrating from the surface |
| products | Takes pairwise products along independent variable of variable |
| randomdata | Returns a variable of random numbers |
| RANGE | Identifies continuous range of values in one grid (i.e., independent variable) for which data will be selected. |
| RANGEEDGES | Identifies continuous range of values in one grid (i.e., independent variable) for which data will be selected. |
| RANGESPAN | Samples variable along one coordinate. Works by creating a child object of the variable |
| rankcorrelate | Calculates the Spearman rank correlation coefficient of two variables over specified grids (i.e., independent variables) |
| rasterize | rasterizes a geometry to match a gridded variable |
| ratios | Takes pairwise ratios along independent variable of variable |
| readgrib | Reads data from GRIB files |
| readthredds | Reads a dataset from THREDDS server |
| regridAverage | Regrids a variable by averaging. Indicated grids of one variable are regridded to match those of another variable. The function is commonly used when comparing multiple variables that are dependent on different spatial grids (see correlation example below). |
| regridLB | Regrids variable2 to match variable1 by using left bounds, i.e. grid is ordered, variable2's grid is a subset of variable1's grid, the values of the variable1 grid are bounded by the values of the variable2 grid, and the variable2 values that are on the left of that pair are used as the matching values |
| regridLinear | Regrids by averaging |
| removeGRID | Removes a single-valued grid (i.e. independent variable) from a variable |
| renameGRID | Assigns new name to an existing grid (i.e., independent variable) |
| REORDER | Reorders variable so that the chunk for the variable has n dimensions and is ordered with the fastest varying dimension corresponding to ivar1, the second to ivar2, ect |
| replacebypercentile | Calculates specified percentiles, based on non-parametric methods. |
| replaceGRID | Replaces a grid (i.e., independent variable) |
| replaceNaN | Replaces missing values in a variable with a selected value (or variable) |
| RESCALE | Rescales data by multiplying by a scalar and then adding a scalar |
| rmsaover | Returns the root mean square averaged over selected grids (i.e., independent variables) with the mean removed |
| rmsover | Returns the root mean square averaged over selected grids (i.e., independent variables) |
| rotatedata | Rotates a variable onto a new grid (X'Y') |
| runningAverage | Calculates the running average |
| SAMPLE | Samples variable along ivar1 according to ivar2 |
| sample-along | Samples variable1 along grid using variable2=grid |
| SAMPLE_MISSING | samples variable by keeping only what is missing from a second variable |
| SAMPLELB | Samples variable along ivar1 according to ivar2, returning lowest value in ivar1 greater than or equal to value in ivar2 |
| SAMPLEUB | Samples variable along ivar1 according to ivar2, returning highest grid value in ivar1 it value in ivar2 |
| SCALE | scales stream so that it has attributes scale_factor and add_offset |
| seasonalAverage | computes seasonal Average over time |
| SELECT | Selects values of a grid based on values of the indicated variable. Commonly used to select stations - station ids (grid) selected based on lat/lon (variables) values (see Live Example). |
| selectbyNaN | Replaces missing_values in variable2 with variable1. Documentation carried primarily from variable1, however, making it a bit different that a reversed replaceNaN |
| setmissing_value | Changes the missing value flag for missing data to value |
| shiftdata | Shifts data to create lagged versions of the data. Commonly used to calculate lag correlations. |
| shiftdatashort | Shifts data to create lagged versions of the data. Commonly used to calculate lag correlations. |
| shiftGRID | Shifts a grid (i.e., independent variable) by a specified number of grid points |
| sin | Calculates the sine of a number or variable (given in radians) |
| sind | Calculates the sine of a number or variable (given in degrees) |
| SM121 | Applies two-dimensional 121 smoothing to a variable |
| sort_by | sorts dataset variables by replacing grid with rank, rank being calculated from variable. |
| splitstreamgrid | Splits grid (i.e., independent variable) into two grids. Commonly-used to create climatologies (see live example below). |
| sqrt | Calculates the square root of a number or variable |
| sqrtsgn | Calculates the square root of a number or variable. The sign (+/-) of argument is preserved in the result. |
| standardize | Standardizes a set of data by removing its mean and dividing the result by its standard deviation |
| STEP | Identifies interval at which data will be selected along one grid (i.e., independent variable). Commonly used with runningAverage to create and select single season averages. |
| sub | Subtracts the item on the top of stack from the item below it. |
| sum | Returns the sum of a dataset or variable over a specified grid |
| svd | Computes singular value decomposition |
| toNaN | Changes missing_values into NaNs. Uses either missing_value or valid_range flags. output is real*4 |
| toNaN8 | Changes missing_values into NaNs. Uses either missing_value or valid_range flags. output is real*4 or real*8 |
| toS | Interpolates onto surfaces |
| transit | Given a variable D(X,Y) and a ship track X(S), Y(S), returns D(S). |
| tsptogau | Converts spectral coefficients to lon/lat |
| tsptogauR | Converts spectral coefficients to lon/lat |
| tsptogauUV | Converts spectral coefficients to lon/lat using spectral harmonics for velocity |
| unitconvert | Converts units |
| unitmatrix | creates a unit matrix |
| unsplitstreamgrid | Combines two grids (i.e., independent variables) that were created by the splitstreamgrid function (i.e., undoes splitstreamgrid) |
| use_as_grid | uses a 1D variable to replace the independent variable on which it depends |
| VALUES | Identifies values along one grid (i.e., independent variable) for which data will be selected |
| varimax | performs varimax rotation on the results of svd |
| :weaver | Performs a simplified weaver objective analysis |
| weighted-average | Computes weighted average |
| width96 | Computes the 96 percentile widths |
| yearly-anomalies | Calculates anomalies based on climatology of all selected years |
| yearly-climatology | Calculates a monthly climatology |
| yearlyAverage | converts daily data to yearly by averaging |
| zeropointwidth | zeros pointwidth of an grid (independent variable) within a variable. |
