*To*: debian-user@lists.debian.org*Subject*: Re: shell wrappers for trig and other mathematical functions*From*: mick crane <mick.crane@gmail.com>*Date*: Wed, 02 Oct 2019 07:32:02 +0100*Message-id*: <[🔎] b55b9a7210f71aba94aa663a4df0576c@gmail.com>*Reply-to*: mick.crane@gmail.com*In-reply-to*: <[🔎] CAOphiz+_06DQtoP0NOzbR4BuvMu9oCpY79AFt5zHdYih9puquQ@mail.gmail.com>*References*: <[🔎] CAOphizJnMAXDnLRaMNRUGpC2A7W6S03nJGXb2Pgk53wF71WRzw@mail.gmail.com> <[🔎] bf98c73f-4937-1352-8664-538c89a37954@holgerdanske.com> <[🔎] CAOphiz+_06DQtoP0NOzbR4BuvMu9oCpY79AFt5zHdYih9puquQ@mail.gmail.com>

On 2019-10-02 05:18, Dan Hitt wrote:

On Tue, Oct 1, 2019 at 8:58 PM David Christensen<dpchrist@holgerdanske.com>wrote:On 10/1/19 8:32 PM, Dan Hitt wrote: > I'm half-way looking for some shell wrappers for common trig functions like > sin, cos, exp, log, and others. > > I'm aware of bc, but it seems cumbersome. > > I would like to just type 'sin 1' and get the sine (of 1 radian), Perl one-liners are an option: 2019-10-01 19:25:59 dpchrist@tinkywinky ~ $ perl -e 'print sin 1' 0.841470984807897 > or type 'log 2' 2019-10-01 20:48:52 dpchrist@tinkywinky ~ $ perl -e 'print log 2' 0.693147180559945 > and get the natural or maybe common log of 2. (Probably any such > program should do something intelligent when faced with multiple or zero > arguments, such as computing the sine or log of each, so that they could be > chained together. And maybe such a program would pay attention to > environment variables or optional command line arguments to tune its > behavior.) > > These kinds of programs would be super-easy to write in just about any > language (i guess perhaps even just as bash functions which shell out to bc > for at least some of the simpler functions) but before i actually do > something like that, i wonder if somebody has already done it, whether > there exist any standards or good ideas, etc. (Because if somebody has a > good, thoughtful exp program, for example, then it could be cookie-cutter > copied to a bunch of other functions.) > > There is a precedent of sorts in Paul Rubin's factor program, which is just > oh-so-handy when you're wondering how an integer factors, but don't want to > start up some heavy-weight system just to find out. 2019-10-01 20:49:17 dpchrist@tinkywinky ~ $ apt-cache search libmath-prime-util-perllibmath-prime-util-perl - utilities related to prime numbers,includingfast sieves and factoring > Thanks in advance for any pointers or advice! :) > > dan DavidHi David, Thanks so much for your reply, including the apt-cache searching part. It does look like a way to quickly get values for sine (or any other function in perl).However, i would like to dispense entirely with the 'perl -e' and'print'part. I really would like stand-alone programs. This would absolutely minimize any typing, and if the programs had a set of good conventions,then they would provide a model for writing others if the functions iwantare not already available in perl (or other interpreter). Thanks again for the suggestion and example!! :) dan

think Perl inbuilt functions are only sin and cos

mick -- Key ID 4BFEBB31

**References**:**shell wrappers for trig and other mathematical functions***From:*Dan Hitt <dan.hitt@gmail.com>

**Re: shell wrappers for trig and other mathematical functions***From:*David Christensen <dpchrist@holgerdanske.com>

**Re: shell wrappers for trig and other mathematical functions***From:*Dan Hitt <dan.hitt@gmail.com>

- Prev by Date:
**Re: Authentication for telnet.** - Next by Date:
**Re: Authentication for telnet.** - Previous by thread:
**Re: shell wrappers for trig and other mathematical functions** - Next by thread:
**Re: shell wrappers for trig and other mathematical functions** - Index(es):