<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.--> <html> <head> <title>GrADS Functions</title> <link href="GrADS.css" rel="stylesheet" type="text/css"> </head> <body bgcolor="e0f0ff" text="#000000"> <center><h3> </h3> <h3> </h3> <h3>GrADS Functions Sorted by Attribute</h3> </center> <p class="plaintext"> <font size=+1>Mathematical Operations</font> <br><code><a href="gradfuncabs.html">abs()</a> </code>Returns the absolute value <br><code><a href="gradfunccdiff.html">cdiff()</a> </code>Performs a centered difference operation <br><code><a href="gradfuncexp.html">exp()</a> </code>Calculates the exponential <br><code><a href="gradfuncgint.html">gint()</a> </code>General integral <br><code><a href="gradfunclog.html">log()</a> </code>Calculates the natural logarithm <br><code><a href="gradfunclog10.html">log10()</a> </code>Calculates the logarithm base 10 <br><code><a href="gradfuncpow.html">pow()</a> </code>Raises the values of <code><i>arg1</i></code> to the power of <code><i>arg2</i></code> <br><code><a href="gradfuncsqrt.html">sqrt()</a> </code>Calculates the square root <br><code><a href="gradfuncvint.html">vint()</a> </code>Calculates a mass-weighted vertical integral in mb pressure coordinates <p class="plaintext"> <font size=+1>Trigonometric Functions</font> <br><code><a href="gradfunccos.html">cos()</a> </code>Calculates the cosine <br><code><a href="gradfuncacos.html">acos()</a> </code>Calculates the inverse cosine <br><code><a href="gradfuncsin.html">sin()</a> </code>Calculates the sine <br><code><a href="gradfuncasin.html">asin()</a> </code>Calculates the inverse sine <br><code><a href="gradfunctan.html">tan()</a> </code>Calculates the tangent <br><code><a href="gradfuncatan2.html">atan2()</a> </code>Calculates the inverse tangent <p class="plaintext"> <font size=+1>Averaging and Summing</font> <br><code><a href="gradfuncaave.html">aave()</a> </code>Calculates an areal average over an X-Y region (latitude-weighted) <br><code><a href="gradfuncamean.html">amean()</a> </code>Calculates an areal average over an X-Y region (not latitude-weighted) <br><code><a href="gradfuncasum.html">asum()</a> </code>Calculates the sum over an X-Y region (grid weighted) <br><code><a href="gradfuncasumg.html">asumg()</a> </code>Calculates the sum over an X-Y region (not grid weighted) <br><code><a href="gradfuncatot.html">atot()</a> </code>Calculates the sum over an X-Y region (grid and latitude weighted) <br><code><a href="gradfuncave.html">ave()</a> </code>Calculates an average over any dimension <br><code><a href="gradfuncgint.html">gint()</a> </code>General integral <br><code><a href="gradfuncmean.html">mean()</a> </code>Calculates an average over any dimension (not latitude weighted) <br><code><a href="gradfuncsum.html">sum()</a> </code>Calculates the sum over any dimension (grid weighted) <br><code><a href="gradfuncsumg.html">sumg()</a> </code>Calculates the sum over any dimension (not grid weighted) <br><code><a href="gradfunctmave.html">tmave()</a> </code>Calculates a time averag while applying a mask <br><code><a href="gradfuncvint.html">vint()</a> </code>Calculates a mass-weighted vertical integral in mb pressure coordinates <p class="plaintext"> <font size=+1>Correlation and Regression</font> <br><code><a href="gradfuncscorr.html">scorr()</a> </code>Calculates the spatial correlation over an X-Y domain <br><code><a href="gradfunctcorr.html">tcorr()</a> </code>Produces a spatial map of temporal correlation coefficients <br><code><a href="gradfuncsregr.html">sregr()</a> </code>Calculates the linear least-squares regression over an X-Y domain <br><code><a href="gradfunctregr.html">tregr()</a> </code>Calculates the least-squares regression over the time domain <p class="plaintext"> <font size=+1>Meteorological Calculations</font> <br><code><a href="gradfunctvrh2q.html">tvrh2q()</a> </code>Calculates specific humidity given virtual temperature and relative humidity <br><code><a href="gradfunctvrh2t.html">tvrh2t()</a> </code>Calculates temperature given virtual temperature and relative humidity <br><code><a href="gradfuncv<int.html">vint()</a> </code>Calculates a mass-weighted vertical integral in mb pressure coordinates <p class="plaintext"> <font size=+1>Vector Operations</font> <br><code><a href="gradfunchcurl.html">hcurl()</a> </code>Calculates the vertical component of the curl <br><code><a href="gradfunchdivg.html">hdivg()</a> </code>Calculates the horizontal divergence using finite differencing <br><code><a href="gradfuncmag.html">mag()</a> </code>Calculates the wind speed given u,v components <br><code><a href="gradfuncskip.html">skip()</a> </code>Sets alternating data values to missing <p class="plaintext"> <font size=+1>Grid Operations</font><br><code><a href="gradfuncamax.html">amax()</a> </code>Returns the maximum grid value over an X-Y region <br><code><a href="gradfuncamaxlocx.html">amaxlocx()</a> </code>Returns the the X location of the maximum grid value over an X-Y region <br><code><a href="gradfuncamaxlocy.html">amaxlocy()</a> </code>Returns the the Y location of the maximum grid value over an X-Y region <br><code><a href="gradfuncamin.html">amin()</a> </code>Returns the minimum grid value over an X-Y region <br><code><a href="gradfuncaminlocx.html">aminlocx()</a> </code>Returns the the X location of the minimum grid value over an X-Y region <br><code><a href="gradfuncaminlocy.html">aminlocy()</a> </code>Returns the the Y location of the minimum grid value over an X-Y region <br><code><a href="gradfuncatot.html">atot()</a> </code>Calculates the sum over an X-Y region (grid and latitude weighted) <br><code><a href="gradfunccdiff.html">cdiff()</a> </code>Performs a centered difference operation <br><code><a href="gradfuncfndlvl.html">fndlvl()</a> </code>Finds the vertical level at which a given value occurs in a variable <br> <code><a href="gradfunclterp.html">lterp()</a> </code>ßPerforms bi-linear interpolation between two grids <br><code><a href="gradfuncmax.html">max()</a> </code>Returns the maximum value over a given grid dimension <br><code><a href="gradfuncmaxloc.html">maxloc()</a> </code>Returns the grid location of the maximum value <br><code><a href="gradfuncmin.html">min()</a> </code>Returns the minimum value over a given grid dimension <br><code><a href="gradfuncminloc.html">minloc()</a> </code>Returns grid location of the minimum value <br><code><a href="gradfuncskip.html">skip()</a> </code>Sets alternating data values to missing <br><code><a href="gradfuncsmth9.html">smth9()</a> </code>Performs a 9 point smoothing operation on gridded data <p class="plaintext"> <font size=+1>Station Data</font> <br><code><a href="gradfunccoll2gr.html">coll2gr()</a> </code>Creates a grid from a collection of station data <br><code><a href="gradfuncgr2stn.html">gr2stn()</a> </code>Grid-to-station interpolator <br><code><a href="gradfuncoabin.html">oabin()</a> </code>Bins station observations into grid cells <br><code><a href="gradfuncoacres.html">oacres()</a> </code>Returns a gridded result that represents station data <br><code><a href="gradfuncs2g1d.html">s2g1d()</a> </code>Converts a station timeseries to a 1D grid <br><code><a href="gradfuncstnave.html">stnave()</a> </code>Calculates a time average of station data <br><code><a href="gradfuncstnmin.html">stnmin()</a> </code>Returns the minimum value over a time series of station data <br><code><a href="gradfuncstnmax.html">stnmax()</a> </code>Returns the maximum value over a time series of station data <p class="plaintext"> <font size=+1>Special Purpose</font> <br><code><a href="gradfuncconst.html">const()</a> </code>Changes missing or non-missing values <br><code><a href="gsf.html">gsfallow()</a> </code>Enables the dynamic loading of script functions <br><code><a href="gsf.html">gsfpath()</a> </code>Specifies the private path directory list where script functions are located <br><code><a href="gradfuncmaskout.html">maskout()</a> </code>Sets certain data values to missing <br><code><a href="gradfunctloop.html">tloop()</a> </code>Reconstructs a time series after doing calculations at fixed times <br><code><a href="gradfunceloop.html">eloop()</a> </code>Reconstructs an E-varying result after doing calculations with the ensemble dimension fixed </body> </html>
