*To*: Dan Hitt <dan.hitt@gmail.com>*Cc*: David Christensen <dpchrist@holgerdanske.com>, debian-user <debian-user@lists.debian.org>*Subject*: Re: shell wrappers for trig and other mathematical functions*From*: Will Mengarini <seldon@eskimo.com>*Date*: Wed, 2 Oct 2019 04:41:56 -0700*Message-id*: <[🔎] 20191002114156.GB10977@eskimo.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>

* Dan Hitt <dan.hitt@gmail.com> [19-10/01=Tue 21:18 -0700]: > 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-perl > > libmath-prime-util-perl - utilities related to prime numbers, including > > fast sieves and factoring > > > > > > > Thanks in advance for any pointers or advice! :) > > > > > > dan > > > > > > David > > > > > Hi 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 i want > are not already available in perl (or other interpreter). > > Thanks again for the suggestion and example!! :) > > dan /pts/8 bash ~ 04:33 0$withsetf(){ "$@"; set +f;} /pts/8 bash ~ 04:33 0$perlPrint(){ perl -wle "\$,=' ';print +(do{$*})";} /pts/8 bash ~ 04:33 0$alias pp='set -f;withsetf perlPrint' /pts/8 bash ~ 04:33 0$pp sin 1 0.841470984807897 /pts/8 bash ~ 04:34 0$pp 3 * 3 9 /pts/8 bash ~ 04:34 0$pp 3 ** 3 27 /pts/8 bash ~ 04:34 0$pp .6 + 1.3 1.9 /pts/8 bash ~ 04:34 0$alias sin='pp sin' # etc, if you want -- Will Mengarini <seldon@eskimo.com> Free software: the Source will be with you, always. sh -c 'echo -n MENGARINI|sum -s|colrm 4' perl -le"print unpack '%C*',MENGARINI"

**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>

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