--- ray/doc/man/man1/rcollate.1	2019/11/11 18:50:07	1.13
+++ ray/doc/man/man1/rcollate.1	2022/03/15 00:25:50	1.15
@@ -1,5 +1,5 @@
-.\" RCSid "$Id: rcollate.1,v 1.13 2019/11/11 18:50:07 greg Exp $"
-.TH RCOLLATE 1 7/8/97 RADIANCE
+.\" RCSid "$Id: rcollate.1,v 1.15 2022/03/15 00:25:50 greg Exp $"
+.TH RCOLLATE 1 9/5/2013 RADIANCE
 .SH NAME
 rcollate - resize or re-order matrix data
 .SH SYNOPSIS
@@ -9,8 +9,10 @@ rcollate - resize or re-order matrix data
 ][
 .B \-w
 ][
-.B \-f[afdb][N]
+.B \-c
 ][
+.B \-f{a|f|d|b}[N]
+][
 .B \-t
 ][
 .B "\-ic in_col"
@@ -61,6 +63,16 @@ The
 .I \-w
 option turns off non-fatal warning messages, such as unexpected EOD.
 .PP
+Normally,
+.I rcollate
+detects whether any transformation is actually taking place, and will
+reproduce the data verbatim if the input size and shape should be unaltered.
+The
+.I \-c
+opiton forces the operation to proceed, even if it appears to be a no-op,
+which can be useful to correct a misshapen input matrix or check that
+the data is the proper size.
+.PP
 The input format is assumed to be ASCII, with three white-space separated words
 (typically numbers) in each record.
 A different input format may be specified with the
@@ -163,5 +175,5 @@ without a transpose or re-ordering,
 .I rcollate
 issues a warning and simply copies its input to its standard output.
 .SH "SEE ALSO"
-cnt(1), histo(1), neaten(1), rcalc(1), rlam(1), rmtxop(1), 
+cnt(1), histo(1), neaten(1), rcalc(1), rcrop(1), rlam(1), rmtxop(1), 
 rsplit(1), tabfunc(1), total(1)