Commit aac33a98 authored by Kilian Lackhove's avatar Kilian Lackhove

Merge branch 'ticket/57-interp-doc' into 'master'

Fix interp module descriptions in the user guide

Closes #57

See merge request !829
parents d07c83a4 b111201e
......@@ -162,13 +162,15 @@ possibly also Reynolds stresses) into single file;
\item \inltt{concatenate}: Concatenate a \nekpp binary output (.chk or .fld) field file into single file (deprecated);
\item \inltt{equispacedoutput}: Write data as equi-spaced output using simplices to represent the data for connecting points;
\item \inltt{extract}: Extract a boundary field;
\item \inltt{gradient}: Computes gradient of fields;
\item \inltt{homplane}: Extract a plane from 3DH1D expansions;
\item \inltt{homstretch}: Stretch a 3DH1D expansion by an integer factor;
\item \inltt{innerproduct}: take the inner product between one or a series of fields with another field (or series of fields).
\item \inltt{interpfield}: Interpolates one field to another, requires fromxml, fromfld to be defined;
\item \inltt{interppointdatatofld}: Interpolates given discrete data using a finite difference approximation to a fld file given an xml file;
\item \inltt{interppoints}: Interpolates a set of points to another, requires fromfld and fromxml to be defined, a line or plane of points can be defined;
\item \inltt{isocontour}: Extract an isocontour of ``fieldid'' variable and at value ``fieldvalue''. Optionally ``fieldstr'' can be specified for a string defiition or ``smooth'' for smoothing;
\item \inltt{interppoints}: Interpolates a field to a set of points. Requires fromfld, fromxml to be defined, and a topts, line, plane or box of target points;
\item \inltt{interpptstopts}: Interpolates a set of points to another. Requires a topts, line, plane or box of target points;
\item \inltt{isocontour}: Extract an isocontour of ``fieldid'' variable and at value ``fieldvalue''. Optionally ``fieldstr'' can be specified for a string definition or ``smooth'' for smoothing;
\item \inltt{jacobianenergy}: Shows high frequency energy of Jacobian;
\item \inltt{qualitymetric}: Evaluate a quality metric of the underlying mesh to show mesh quality;
\item \inltt{meanmode}: Extract mean mode (plane zero) of 3DH1D expansions;
......@@ -531,7 +533,7 @@ the second one contains the $a$-values, the third the $b$-values and so on.
In case of $n$-dimensional data, the $n$ coordinates are specified in the first $n$
columns accordingly.
An equivalant csv file is:
An equivalent csv file is:
# x, a, b, c
......@@ -633,6 +635,40 @@ and $cp0$ are not evaluated accordingly
This module runs in parallel for the line, plane and box extraction of points.
\subsection{Interpolate a set of points to another: \textit{interpptstopts} module}
You can interpolate one set of points to another using the following command:
FieldConvert file1.pts -m interpptstopts:topts=file2.pts file2.dat
This command will interpolate the data in \inltt{file1.pts} to a new set
of points defined in \inltt{file2.pts} and output it to
Similarly to the \textit{interppoints} module, the target point distribution
can also be specified using the \inltt{line}, \inltt{plane} or \inltt{box}
options. The optional arguments \inltt{clamptolowervalue},
\inltt{clamptouppervalue}, \inltt{defaultvalue} and \inltt{cp} are also
supported with the same meaning as in \textit{interppoints}.
One useful application for this module is with 3DH1D expansions, for which
currently the \textit{interppoints} module does not work. In this case, we can
use for example
FieldConvert file1.xml file1.fld -m interpptstopts:\
plane=npts1,npts2,x0,y0,z0,x1,y1,z1,x2,y2,z2,x3,y3,z3 \
With this usage, the \textit{equispacedoutput} module will be automatically
called to interpolate the field to a set of equispaced points in each element.
The result is then interpolated to a plane by the \textit{interpptstopts} module.
This module does not work in parallel.
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