You can use package num-utils for simple manipulations...
For more serious maths, see this link...this link... It describes several options, eg.
- R / Rscript (GNU R statistical computation and graphics system)
- octave (mostly Matlab compatible)
- bc (The GNU bc arbitrary precision calculator language)
An example of numprocess
echo "123.456" | numprocess /+33.267,%2.33777/ # 67.0395291239087 A programs for dealing with numbers from the command line The 'num-utils' are a set of programs for dealing with numbers from the Unix command line. Much like the other Unix command line utilities like grep, awk, sort, cut, etc. these utilities work on data from both standard in and data from files. Includes these programs: * numaverage: A program for calculating the average of numbers. * numbound: Finds the boundary numbers (min and max) of input. * numinterval: Shows the numeric intervals between each number in a sequence. * numnormalize: Normalizes a set of numbers between 0 and 1 by default. * numgrep: Like normal grep, but for sets of numbers. * numprocess: Do mathematical operations on numbers. * numsum: Add up all the numbers. * numrandom: Generate a random number from a given expression. * numrange: Generate a set of numbers in a range expression. * numround: Round each number according to its value. Here is a bash hack...It adds leading 0's to the integer to make a string left-to-right comparison meaningful. This particular piece of code requires that both min and val actually have a decimal point and at least one decimal digit.
min=12.45 val=10.35 MIN=0; VAL=1 # named array indexes, for clarity IFS=.; tmp=($min $val); unset IFS tmp=($(printf -- "%09d.%s\n" ${tmp[@]})) [[ ${tmp[VAL]} < ${tmp[MIN]} ]] && min=$val echo min=$min output:
min=10.35 
