Standard Library
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Package std-mesh (in std.i) - functions on mesh arrays
Index of documented functions or symbols:
DOCUMENT area(y, x) returns the zonal areas of the 2-D mesh (X, Y). If Y and X are imax-by-jmax, the result is (imax-1)-by-(jmax-1). The area is positive when, say, X increases with i and Y increases with j. For example, area([[0,0],[1,1]],[[0,1],[0,1]]) is +1.
SEE ALSO: volume
DOCUMENT call, subroutine(arg1, arg2, arg3, arg4, arg5
arg6, arg7, arg8);
allows a SUBROUTINE to be called with a very long argument list
as an alternative to:
subroutine, arg1, arg2, arg3, arg4, arg5,
arg6, arg7, arg8;
Note that the statement
subroutine(arg1, arg2, arg3, arg4, arg5,
arg6, arg7, arg8);
will print the return value of subroutine, even if it is nil.
If invoked as a function, call simply returns its argument.
SEE ALSO: noop
DOCUMENT noop(x) returns X. Use to make simple variable references into expressions. The noop function is a builtin, which runs much faster than the interpreted "call" function. Also, if X is an array reference for a file handle, "call" performs the read, while "noop" does not.
SEE ALSO: call
DOCUMENT ptcen(zncen)
or ptcen(zncen, ireg)
returns point centered version of the 2-D zone centered array ZNCEN.
The result is imax-by-jmax if ZNCEN is (imax-1)-by-(jmax-1).
If the region number array IREG is specified, zones with region
number 0 are not included in the point centering operation.
Note that IREG should have dimensions imax-by-jmax; the first
row and column of IREG are ignored.
Without IREG, ptcen(zncen) is equivalent to zncen(pcen,pcen).
DOCUMENT uncen(ptcen)
or uncen(ptcen, ireg)
returns zone centered version of the 2-D zone centered array PTCEN.
The result is (imax-1)-by-(jmax-1) if PTCEN is imax-by-jmax.
If the region number array IREG is specified, zones with region
number 0 are not included in the point centering operation.
Note that IREG should have dimensions imax-by-jmax, like
the input PTCEN array; the first row and column of IREG are ignored.
Without IREG, uncen(ptcen) is equivalent to ptcen(uncp,uncp).
Do not use uncen to zone center data which is naturally point
centered -- use the zncen function for that purpose. The uncen
function is the (nearly) exact inverse of the ptcen function,
so that uncen(ptcen(zncen, ireg), ireg) will return the original
zncen array. The uncen reconstruction is as exact as possible,
given the finite precision of floating point operations.
DOCUMENT volume(r, z) returns the zonal volumes of the 2-D cylindrical mesh (R, Z). If R and Z are imax-by-jmax, the result is (imax-1)-by-(jmax-1). The volume is positive when, say, Z increases with i and R increases with j. For example, volume([[0,0],[1,1]],[[0,1],[0,1]]) is +pi.
SEE ALSO: area
DOCUMENT zncen(ptcen)
or zncen(ptcen, ireg)
returns zone centered version of the 2-D point centered array PTCEN.
The result is (imax-1)-by-(jmax-1) if PTCEN is imax-by-jmax.
If the region number array IREG is specified, zones with region
number 0 are not included in the point centering operation.
Note that IREG should have dimensions imax-by-jmax, like
the input PTCEN array; the first row and column of IREG are ignored.
Without IREG, zncen(ptcen) is equivalent to ptcen(zcen,zcen).