tachi-hi

# 
# makefile for TeX document whose version number is managed manually 
# e.g.
#   document_v1.tex  document_v2.tex ...
# 

LATEX = latex
BIBTEX = bibtex
DVIPDF = dvipdf
RM = rm -f

tachi-hi

# Given matrix V, and decompose it as 
# V ~ W %*% H

NMF.EUC <- function(V, r, n){
 W <- matrix(runif(nrow(V)*r), nrow(V), r)
 H <- matrix(runif(ncol(V)*r), r, ncol(V))
 d <- c(0)
 for(i in 1:n){
  W <- W * (V %*% t(H)) / (W %*% H %*% t(H))
  H <- H * (t(W) %*% V) / (t(W) %*% W %*% H)

tachi-hi

#!/usr/bin/bash

# >> ls *.xls
# xxx_v1.xls  xxx_v10.xls  xxx_v2.xls  xxx_v3.xls
# 
# we'd like to find the latest version.

ls *.xls | sed -e 's/.*_v\([0-9]*\).*/\1/g' | sort -n | tail -n 1 

# or