The source of mybook

[edu Gpl]

Hi
This the source of my book, all free and GPL:
- text.
- code.
- images svg, png, pdf.

 https://sourceforge.net/projects/laws-in-physics/files/source/

Best regards

Re: Invoking spreadtab.sty [UPDATE]

[Rich Shepard]

On Sat, 23 Dec 2017, Andrew Parsloe wrote:


Rich, some years ago I developed a module so that spreadtab could be used
in LyX and if instant preview  was on it allowed a kind of lightweight
interactive spreadsheeting. I used it for keeping a timesheet when I was
freelancing as an indexer.


Andrew,

  When I'm engaged as a consulting/testifying expert by litigators I need to
provide a monthly statement of withdrawals against the retainer (and
replentishment of the retainer as needed). The spreadtab and longtable
packages fill this need.


There's a link to a dropbox folder, holding a zipped archive of the module
and explanatory document, on the wiki: item 1.5 at
http://wiki.lyx.org/Layouts/Modules. The module provides a command for
turning a table built in LyX into a spreadtab table. There are a couple of
other helper commands defined too.


  Got it. Should work with the 2.2.3 version here.


Possibly the examples in the document would give you all the help you
need.


  I'll read the doc and work with it over the weekend.

Thanks very much,

Rich

Re: Invoking spreadtab.sty [UPDATE]

[Andrew Parsloe]

On 23/12/2017 10:44 a.m., Rich Shepard wrote:

On Fri, 22 Dec 2017, Rich Shepard wrote:


 Having put \usepackage{spreadtab} in the preamble, I assume that I put
the ERT \begin{spreadtab} just above the table and the ERT 
\end{spreadtab}
immediately following the table (similar to use of the \multicol 
package.)


 Is this correct?


  Apparently not; but I may well be wrong.

  Expanding my request for help with spreadtab, how do I enter 
formulae in a

cell (e.g., c2*e2) or relative references (using backets to define the
relative cell positions)?

  The spreadtab docs describe doing this in LaTeX and I'd appreciate
pointers on using this package in LyX.

TIA,

Rich
Rich, some years ago I developed a module so that spreadtab could be 
used in LyX and if instant preview  was on it allowed a kind of 
lightweight interactive spreadsheeting. I used it for keeping a 
timesheet when I was freelancing as an indexer. There's a link to a 
dropbox folder, holding a zipped archive of the module and explanatory 
document, on the wiki: item 1.5 at http://wiki.lyx.org/Layouts/Modules. 
The module provides a command for turning a table built in LyX into a 
spreadtab table. There are a couple of other helper commands defined too.


It is some time since I last looked at this -- the dropbox link is to a 
LyX 2.1 document -- so my knowledge is a bit rusty but I imagine it 
would come back. Possibly the examples in the document would give you 
all the help you need.


Andrew

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Re: Invoking spreadtab.sty [UPDATE]

[Rich Shepard]

On Fri, 22 Dec 2017, Rich Shepard wrote:


 Having put \usepackage{spreadtab} in the preamble, I assume that I put
the ERT \begin{spreadtab} just above the table and the ERT \end{spreadtab}
immediately following the table (similar to use of the \multicol package.)

 Is this correct?


  Apparently not; but I may well be wrong.

  Expanding my request for help with spreadtab, how do I enter formulae in a
cell (e.g., c2*e2) or relative references (using backets to define the
relative cell positions)?

  The spreadtab docs describe doing this in LaTeX and I'd appreciate
pointers on using this package in LyX.

TIA,

Rich

Invoking spreadtab.sty

[Rich Shepard]

  I read in Herb Voss' book ("Typesetting tables with LaTeX") that the
spreadtab package replaces the tabular environment. Reading the Tables
section of the Embedded Objects manual I see no reference to the spreadtab
package.

  Having put \usepackage{spreadtab} in the preamble, I assume that I put the
ERT \begin{spreadtab} just above the table and the ERT \end{spreadtab}
immediately following the table (similar to use of the \multicol package.)

  Is this correct?

Rich

Re: Creating a statement of account

[Rich Shepard]

On Fri, 22 Dec 2017, Dr Eberhard Lisse wrote:


my view is that you are using the wrong tool, ie typesetting to do
bookkeeping instead of letting the bookkeeping do the typesetting.


  It seems that no one read what I wrote. Yes, I used to use SQL-Ledger,
too, until it died. Now I use GnuCash.

  I am using LyX with the longtable package to _write_ a statement of
account.

  However, ...

Rich

Re: Creating a statement of account

[Dr Eberhard Lisse]

Well,

my view is that you are using the wrong tool, ie typesetting to do
bookkeeping instead of letting the bookkeeping do the typesetting.

I use SQL-Ledger which is Open Source in Perl and uses LaTeX to prepare
the invoices. I have developed a template with KOMA-Script to my liking
and haven't looked at it for years, as it merrily emails the invoises

el

On 2017-12-21 00:32 , Rich Shepard wrote:
>   I'm trying to create an account statement for clients whom I invoice
> by time and expense and I'm missing something in my efforts. The
> statement is a running explanation of payments received and charges
> against those payments.  I'm trying to use the invoice2 package, so
> far unsuccessfully.
[...]

Re: Creating a statement of account [RESOVED]L

[Joel Kulesza]

On Fri, Dec 22, 2017 at 10:47 PM, Rich Shepard 
wrote:

> On Fri, 22 Dec 2017, Joel Kulesza wrote:
>
> I tend to agree with Steve's points.
>>
>
> Joel,
>
>   I fail to understand why you and Steve think LyX/LaTeX is not suitable
> for
> producing an invoice/statement while a word processor such as LibreOffice
> is.


In my very vague statement I made no such claim that LibreOffice /
Microsoft office is suitable, but instead tried to suggest that LaTeX may
not be the right tool.  Rather, I would rely on purpose-built accounting
software to manage finances.  This software would be able to focus on the
details and complexities of the finances, rather than the details of the
output.  Those financial details could then be captured and moulded into
whatever output format, and with whatever output processor, you prefer
(LaTeX, myriad Pandoc-compatible formats, etc.).  While I wholly appreciate
LaTeX's capabilities, as a general framework lots of folks have adapted it
to uses that it, as a typesetting engine, isn't best suited.  As one goes
from typesetting toward programming, I start to ask myself whether it is
the right tool to perform the processing or just to prepare the ultimate
output.  If one has invoices that are as simple as what I demonstrated, by
all means use it.  However, not knowing your business finances, I can't
make that assessment and would prefer to err on the side of caution.

As an example: I use TikZ heavily and it isn't so long ago that I was using
it to perform a calculation within an illustration and was surprised to see
that a rather basic trigonometric function wasn't available in the version
of TeXLive I was using.  Keeping everything "in LaTeX" is ideal, but
sometimes there are weaknesses or simplifications made in available
packages that make this more troublesome/risky (how much of the solution is
rigorous versus being a functional hack?) than using an external
application.  When it comes to finances, I wish to avoid any hint of risk.


> I can produce invoices with GnuCash, but they're more parts-focused, not
> time-and-expense-focused. I used to use a spreadsheet to track retainer anc
> charges but the output is not as professional as is the output from LaTeX.
>

Using a spreadsheet, GnuCash, or some other finance-based software and then
directing its output to LaTeX for ultimate typesetting is how I would
operate.  This way you get the strength of a proper accounting program but
the elegant output of LaTeX.  The two key adages I follow in this regard
are UNIX's "do one thing, and do it well" and someone else's "use the right
tool for the right job."


> However, do you have an example .lyx file that isn't working for you and
>> an example of what you're trying to achieve (perhaps from a pre-LyX
>> interface)? Do you have a MWE, maybe without the fancy invoice2
>> components?
>>
>
>   My question was how to correctly implement the invoice2 package and the
> example you sent explains that very well. It also shows me that the
> invoice2
> package is not suitable for a statement which is a history of the project
> rather than a stand-alone invoice for a single month. Seeing this now
> answers my question.


Good.


> And, LyX does produce a nicely typeset statement which
> can run multiple pages when necessary.
>

Indeed.  I have periodically used multipage tables (manually, not with a
guiding framework like invoice2) and have been generally happy with the
result.

- Joel

Re: Creating a statement of account [RESOVED]L

[Rich Shepard]

On Fri, 22 Dec 2017, Joel Kulesza wrote:


I tend to agree with Steve's points.


Joel,

  I fail to understand why you and Steve think LyX/LaTeX is not suitable for
producing an invoice/statement while a word processor such as LibreOffice
is. I can produce invoices with GnuCash, but they're more parts-focused, not
time-and-expense-focused. I used to use a spreadsheet to track retainer anc
charges but the output is not as professional as is the output from LaTeX.


However, do you have an example .lyx file that isn't working for you and
an example of what you're trying to achieve (perhaps from a pre-LyX
interface)? Do you have a MWE, maybe without the fancy invoice2
components?


  My question was how to correctly implement the invoice2 package and the
example you sent explains that very well. It also shows me that the invoice2
package is not suitable for a statement which is a history of the project
rather than a stand-alone invoice for a single month. Seeing this now
answers my question. And, LyX does produce a nicely typeset statement which
can run multiple pages when necessary.

Thanks to both of you for responding,

Rich

Re: Creating a statement of account

[Joel Kulesza]

On Thu, Dec 21, 2017 at 7:32 AM, Rich Shepard 
wrote:

>   I'm trying to create an account statement for clients whom I invoice by
> time and expense and I'm missing something in my efforts. The statement is
> a
> running explanation of payments received and charges against those
> payments.
> I'm trying to use the invoice2 package, so far unsuccessfully.
>

Rich,

I tend to agree with Steve's points.

However, do you have an example .lyx file that isn't working for you and an
example of what you're trying to achieve (perhaps from a pre-LyX
interface)?  Do you have a MWE, maybe without the fancy invoice2 components?

- Joel