__init__ (self, prefix, fieldName, beginDump, endDump)Initialize the FDM object. Here prefix is the path to the data
files, up to and excluding the underscore preceding the dataset name.
fieldName is the name of the field to analyze to obtain
frequencies. beginDump and endDump are the first and one
greater than the last dump numbers to use.
setPointsRandom (self, npts)Select npts random field points to use in the analysis. Components will also be chosen randomly.
setPointsUniform (self, npts, component = None)Here, npts is a tuple giving the number of points to use in each
spatial direction; points will be placed on a uniform grid. If
component (an integer) is given, only that component will be
used. If component is omitted, the component will be chosen from
among all field components in a round-robin fashion.
readAndCompute (self)This reads the data specified and performs the bulk of the FDM analysis. However, computeModes must be called to compute a requested number of modes.
computeModes (self, nmodes)This computes the (complex) frequencies of nmodes modes.
constructModes (self, fieldName, compl = real)Construct the field fieldName for the previously
computed modes. compl can be either real or
imag. Eigenmode fields will be written to files named
Eigenmode_*fieldName*[I]_modenum.h5 in the same
directory as the data. The letter I is appended to the
field name for imaginary fields, and modenum is the
mode index, starting with 0, ordered from low to high
frequency.
displayModes (self)Display the computed mode information in a convenient format. This gives the number of the mode, the frequency, the inverse Q and the SVD value which allows the user to understand where the reliable mode calculations stop.
import FDM
extr = FDM.FDM("modeExtract2s", "elecField", 2, 14)
extr.setPointsUniform((10, 10), None)
extr.readAndCompute()
extr.computeModes(2)
extr.constructModes("elecField")
extr.displayModes()