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Calculator with "tapes"

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  Calculator with "tapes" Ken Heard <kenslists@teksavvy.com> - 2018-07-16 19:00 +0200
    Re: Calculator with "tapes" Joe <joe@jretrading.com> - 2018-07-16 19:10 +0200
      Re: Calculator with "tapes" Jude DaShiell <jdashiel@panix.com> - 2018-07-16 19:50 +0200
    Re: Calculator with "tapes" Boyan Penkov <boyan.penkov@gmail.com> - 2018-07-16 19:20 +0200
    Re: Calculator with "tapes" Nicholas Geovanis <nickgeovanis@gmail.com> - 2018-07-16 19:20 +0200
    Re: Calculator with "tapes" Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-07-16 19:50 +0200
    Calculator with "tapes" "Thomas Schmitt" <scdbackup@gmx.net> - 2018-07-16 20:00 +0200
    Re: Calculator with "tapes" Eric S Fraga <e.fraga@ucl.ac.uk> - 2018-07-16 23:10 +0200
    Re: Calculator with "tapes" Ben Caradoc-Davies <ben@transient.nz> - 2018-07-17 02:00 +0200
    Re: Calculator with "tapes" Zenaan Harkness <zenaan@freedbms.net> - 2018-07-17 02:20 +0200
      Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-17 03:10 +0200
        Re: Calculator with "tapes" Curt <curty@free.fr> - 2018-07-17 11:20 +0200
          Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-17 12:40 +0200
            Re: Calculator with "tapes" Curt <curty@free.fr> - 2018-07-17 13:40 +0200
              Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-17 14:30 +0200
                Re: Calculator with "tapes" Curt <curty@free.fr> - 2018-07-17 14:50 +0200
                  Re: Calculator with "tapes" Greg Wooledge <wooledg@eeg.ccf.org> - 2018-07-17 15:00 +0200
        Re: Calculator with "tapes" Zenaan Harkness <zenaan@freedbms.net> - 2018-07-23 04:30 +0200
          Re: Calculator with "tapes" Curt <curty@free.fr> - 2018-07-23 09:30 +0200
          Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-23 13:10 +0200
            Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-23 13:20 +0200
              Re: Calculator with "tapes" <tomas@tuxteam.de> - 2018-07-23 13:30 +0200
                Re: Calculator with "tapes" Stefan Krusche <linux@stefan-krusche.de> - 2018-07-23 13:50 +0200
            Re: Calculator with "tapes" <tomas@tuxteam.de> - 2018-07-23 13:30 +0200
    Re: Calculator with "tapes" Piotr <zaxonxp45@gmail.com> - 2018-07-17 07:30 +0200
    Re: Calculator with "tapes" John Darrah <xyllyx@gmail.com> - 2018-07-23 16:50 +0200

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#197696 — Calculator with "tapes"

Does Debian have a calculator package which has the equivalent of the 
tape produced by mechanical machines to show the entire calculation.  I 
find such "tapes" essential when for example I am adding a long list of 
numbers and need to check after the addition is done to verify that all 
the numbers were entered correctly.

Regards, Ken

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#197697

On Mon, 16 Jul 2018 12:57:58 -0400
Ken Heard <kenslists@teksavvy.com> wrote:

> Does Debian have a calculator package which has the equivalent of the 
> tape produced by mechanical machines to show the entire calculation.
> I find such "tapes" essential when for example I am adding a long
> list of numbers and need to check after the addition is done to
> verify that all the numbers were entered correctly.
> 
> Regards, Ken
> 

I use a spreadsheet for this.

-- 
Joe

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#197702

On Mon, 16 Jul 2018, Joe wrote:

> Date: Mon, 16 Jul 2018 13:06:13
> From: Joe <joe@jretrading.com>
> To: debian-user@lists.debian.org
> Subject: Re: Calculator with "tapes"
> Resent-Date: Mon, 16 Jul 2018 17:06:32 +0000 (UTC)
> Resent-From: debian-user@lists.debian.org
>
> On Mon, 16 Jul 2018 12:57:58 -0400
> Ken Heard <kenslists@teksavvy.com> wrote:
>
> > Does Debian have a calculator package which has the equivalent of the
> > tape produced by mechanical machines to show the entire calculation.
> > I find such "tapes" essential when for example I am adding a long
> > list of numbers and need to check after the addition is done to
> > verify that all the numbers were entered correctly.
> >
> > Regards, Ken
> >
>
> I use a spreadsheet for this.
>
>

dc can do this if you don't mind the command line and remember your tape
in this case is called a stack.  This is important to remember since
commands exist in dc if you use them that will destroy the stack either
immediately or slowly.  There is a command in dc to print the entire
stack which is what you will find useful too.
-- 

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#197698

[Multipart message — attachments visible in raw view] — view raw

iPython too much overhead?

On Mon, Jul 16, 2018, 12:58 Ken Heard <kenslists@teksavvy.com> wrote:

> Does Debian have a calculator package which has the equivalent of the
> tape produced by mechanical machines to show the entire calculation.  I
> find such "tapes" essential when for example I am adding a long list of
> numbers and need to check after the addition is done to verify that all
> the numbers were entered correctly.
>
> Regards, Ken
>
>

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#197699

galculator has a so-called "paper mode" on the "View" selection
that likely does what you want. It's in the Debian 8 repository,
written to GTK.
On Mon, Jul 16, 2018 at 11:58 AM Ken Heard <kenslists@teksavvy.com> wrote:
>
> Does Debian have a calculator package which has the equivalent of the
> tape produced by mechanical machines to show the entire calculation.  I
> find such "tapes" essential when for example I am adding a long list of
> numbers and need to check after the addition is done to verify that all
> the numbers were entered correctly.
>
> Regards, Ken
>

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#197701

Ken Heard <kenslists@teksavvy.com> writes:

> Does Debian have a calculator package which has the equivalent of the
> tape produced by mechanical machines to show the entire calculation.
> I find such "tapes" essential when for example I am adding a long list
> of numbers and need to check after the addition is done to verify that
> all the numbers were entered correctly.
>
> Regards, Ken

The emacs calculator mode has it.

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#197703

Hi,

if i had no other preferences, i'd use program "bc" in an xterm with
enormous scroll buffer.
Run in some shell window:

  xterm -fg black -bg wheat -sl 100000 &

and then in the newly emerged xterm shell window

  bc

(My virtual paper is of eco-friendly color. I do not let xterm start bc
 directly, because then on bc xommand "quit" the paper would vanish.)


Have a nice day :)

Thomas

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#197708

calc mode in emacs does this (and so much more).
-- 
Eric S Fraga via Emacs 27.0.50 & org 9.1.13 on Debian 9.4

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#197711

On 17/07/18 04:57, Ken Heard wrote:
> Does Debian have a calculator package which has the equivalent of the 
> tape produced by mechanical machines to show the entire calculation.  I 
> find such "tapes" essential when for example I am adding a long list of 
> numbers and need to check after the addition is done to verify that all 
> the numbers were entered correctly.
> Regards, Ken

I use a Python interpreter in a terminal or libreoffice-calc.

Kind regards,

-- 
Ben Caradoc-Davies <ben@transient.nz>
Director
Transient Software Limited <https://transient.nz/>
New Zealand

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#197713

On Mon, Jul 16, 2018 at 12:57:58PM -0400, Ken Heard wrote:
> Does Debian have a calculator package which has the equivalent of the tape
> produced by mechanical machines to show the entire calculation.  I find such
> "tapes" essential when for example I am adding a long list of numbers and need
> to check after the addition is done to verify that all the numbers were
> entered correctly.

bc FTW - so quick, so handy

First line I always run though is:
 scale=9

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#197714

Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
> bc FTW - so quick, so handy
>
> First line I always run though is:
>  scale=9

When you don't want to type this every time:

$ cat ~/.bcrc
scale=3

Regards,
Stefan

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#197720

On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
> Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
>> bc FTW - so quick, so handy
>>
>> First line I always run though is:
>>  scale=9
>
> When you don't want to type this every time:
>
> $ cat ~/.bcrc
> scale=3

Nein?

> Regards,
> Stefan
>
>
>


-- 
The superintendent and the gang bosses all turned out with revolvers in black
holsters strapped around their waists and one of them made a speech in English
and another one Sicilian saying that this was a squareshooting concern that had
always treated laborers square and if they didn’t like it they could get the hell out. 
--John Dos Passos, 1919 (second book of U.S.A. trilogy)

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#197723

Am Dienstag 17 Juli 2018 schrieb Curt:
> On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
> > Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
> >> bc FTW - so quick, so handy
> >>
> >> First line I always run though is:
> >>  scale=9
> >
> > When you don't want to type this every time:
> >
> > $ cat ~/.bcrc
> > scale=3
>
> Nein?

Hi Curt,

unfortunately I have absolutely no idea what you want to say by this response 
which translates to "No?"... :-(

Kind Regards,
Stefan

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#197726

On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
> Am Dienstag 17 Juli 2018 schrieb Curt:
>> On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
>> > Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
>> >> bc FTW - so quick, so handy
>> >>
>> >> First line I always run though is:
>> >>  scale=9
>> >
>> > When you don't want to type this every time:
>> >
>> > $ cat ~/.bcrc
>> > scale=3
>>
>> Nein?
>
> Hi Curt,
>
> unfortunately I have absolutely no idea what you want to say by this response 
> which translates to "No?"... :-(

Hi Stefan,

Yeah, it was kind of a deliberate (and obscure)
metathesis/anagram/bilingual play on words because he wants 9 (nein,
nine) and you showed 3 (when he always wants nine)!

curty@einstein:~$  echo 'scale=2; 2.777 - 1.4744' | bc
1.3026

Oops. Should read the man page I guess*.

In other words, a complete waste of everybody's time as usual (by yours
truly, of course, meaning me).

* It seems division uses the scale variable, but not addition, subtraction, or
multiplication. They use the scale of the operands. "expr / expr".


> Kind Regards,
> Stefan
>
>


-- 
The superintendent and the gang bosses all turned out with revolvers in black
holsters strapped around their waists and one of them made a speech in English
and another one Sicilian saying that this was a squareshooting concern that had
always treated laborers square and if they didn’t like it they could get the hell out. 
--John Dos Passos, 1919 (second book of U.S.A. trilogy)

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#197729

Am Dienstag 17 Juli 2018 schrieb Curt:
> On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
> > Am Dienstag 17 Juli 2018 schrieb Curt:
> >> On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
> >> > Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
> >> >> bc FTW - so quick, so handy
> >> >>
> >> >> First line I always run though is:
> >> >>  scale=9
> >> >
> >> > When you don't want to type this every time:
> >> >
> >> > $ cat ~/.bcrc
> >> > scale=3
> >>
> >> Nein?
> >
> > Hi Curt,
> >
> > unfortunately I have absolutely no idea what you want to say by this
> > response which translates to "No?"... :-(
>
> Hi Stefan,
>
> Yeah, it was kind of a deliberate (and obscure)
> metathesis/anagram/bilingual play on words because he wants 9 (nein,
> nine) and you showed 3 (when he always wants nine)!

Alright, thanks for explaining, now I get it. Yes, okay, 3/9 mismatch. I just 
quickly wanted to point out, that it is possible to store scale= in a config 
file..

Stefan

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#197732

On 2018-07-17, Stefan Krusche <linux@stefan-krusche.de> wrote:
>
> Alright, thanks for explaining, now I get it. Yes, okay, 3/9 mismatch. I just 
> quickly wanted to point out, that it is possible to store scale= in a config 
> file..

Yes, of course, we all understood that you were showing the example of
your own file--there was no confusion.


> Stefan
>
>


-- 
The superintendent and the gang bosses all turned out with revolvers in black
holsters strapped around their waists and one of them made a speech in English
and another one Sicilian saying that this was a squareshooting concern that had
always treated laborers square and if they didn’t like it they could get the hell out. 
--John Dos Passos, 1919 (second book of U.S.A. trilogy)

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#197734

People are talking about manually setting the "scale" variable in bc,
and using small values like 3 for it.

Please note that this the scale variable is NOT just used for rounding of
final results for display.  It's used for internal precision of storage
of ALL intermediate results.  Using a small scale can and will distort
your results.

I learned this the hard way.

Need an example?  OK.  Let's calculate 1.4 to the power of 50.5.

$ bc -l
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 
1.4^50.5
Runtime warning (func=(main), adr=12): non-zero scale in exponent
20248916.23976437135118764865

As the warning indicates, you can't actually use a non-integer exponent
with the ^ operator in bc -l.  But you can rewrite it with a logarithm
and an exponent.  So let's do that.

e(50.5*l(1.4))
23958840.79914949898175198920

OK, that's too many digits, so now let's do the same thing with scale=3:

scale=3
e(50.5*l(1.4))
23394230.731

The result is substantially different.  This is because the scale is
used internally, NOT just on the final result.

If you use bc, always just use "bc -l" which sets a scale of 20, and
leave it set that way.  If you need a prettier result, take the result
from bc -l and use printf to round it.  Or use a programming language
that has floating point arithmetic support.

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#197930

On Tue, Jul 17, 2018 at 03:04:41AM +0200, Stefan Krusche wrote:
> Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
> > bc FTW - so quick, so handy
> >
> > First line I always run though is:
> >  scale=9
> 
> When you don't want to type this every time:
> 
> $ cat ~/.bcrc
> scale=3

OK, so I created ~/.bcrc, setting scale to 20:

$ cat ~/.bcrc
scale=20

BUT, when I run bc, I get:

$ bc
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software
Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
scale

0
^D


What am I doing wrong here?
TIA,

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#197932

On 2018-07-23, Zenaan Harkness <zenaan@freedbms.net> wrote:
>
> BUT, when I run bc, I get:

bc -l

(like Greg said works here).


curty@einstein:~$ bc -l
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 
scale
20

curty@einstein:~$ bc
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 
scale

0

I believe 20 is the default scale, so your .bcrc might express the principle
of superfluity rather than anything else.

> $ bc
> bc 1.06.95
> Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software
> Foundation, Inc.
> This is free software with ABSOLUTELY NO WARRANTY.
> For details type `warranty'.
> scale
> 0
> ^D
>
>
> What am I doing wrong here?
> TIA,
>
>


-- 
Boris sober and Boris drunk are such different people, they’ve never even met. 
-- Sergei Dovlatov, Pushkin Hills

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#197937

Am Montag 23 Juli 2018 schrieb Zenaan Harkness:
> On Tue, Jul 17, 2018 at 03:04:41AM +0200, Stefan Krusche wrote:
> > Am Dienstag 17 Juli 2018 schrieb Zenaan Harkness:
> > > bc FTW - so quick, so handy
> > >
> > > First line I always run though is:
> > >  scale=9
> >
> > When you don't want to type this every time:
> >
> > $ cat ~/.bcrc
> > scale=3
>
> OK, so I created ~/.bcrc, setting scale to 20:
>
> $ cat ~/.bcrc
> scale=20
>
> BUT, when I run bc, I get:
>
> $ bc
> bc 1.06.95
> Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software
> Foundation, Inc.
> This is free software with ABSOLUTELY NO WARRANTY.
> For details type `warranty'.
> scale
> 0
> ^D
>
>
> What am I doing wrong here?

No idea... .bcrc saved? And readable? Sorry, can't help.
Stefan

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