NAME¶
tabfunc - convert table to functions for rcalc, etc.
SYNOPSIS¶
tabfunc [
-i ] func1 [func2 ..]
DESCRIPTION¶
Tabfunc reads a table of numbers from the standard input and converts it
to an expression suitable for
icalc(1), rcalc(1) and their
cousins. The input must consist of a M x N matrix of real numbers, with
exactly one row per line. The number of columns must always be the same in
each line, separated by whitespace and/or commas, with no missing values. The
first column is always the independent variable, whose value indexes all of
the other elements. This value does not need to be evenly spaced, but it must
be either monotonically increasing or monotonically decreasing. (I.e. it
cannot go up and then down, or down and then up.) Maximum input line
width is 4096 characters and the maximum number of data rows is 1024. Input
lines not beginning with a numerical value will be silently ignored.
The command-line arguments given to
tabfunc are the names to be assigned
to each column.
Tabfunc then produces a single function for each column
given. If there are some columns which should be skipped, the dummy name
"0" may be given instead of a valid identifier. (It is not necessary
to specify a dummy name for extra columns at the end of the matrix.)
The
-i option causes
tabfunc to produce a description that will
interpolate values in between those given for the independent variable on the
input.
EXAMPLE¶
To convert a small data table and feed it to rcalc for some calculation:
-
- rcalc -e `tabfunc f1 f2 < table.dat` -f com.cal
AUTHOR¶
Greg Ward
SEE ALSO¶
cnt(1),
icalc(1),
neaten(1),
rcalc(1),
rlam(1),
total(1)
