gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] Plotshare: online interface for gnuplot

[Tait <gnu...@t4...>]

> ...
> Thanks for the tool; I look forward to using it. As for a
> wish-list... maybe syntax highlighting and line numbers in the
> gnuplot-script section? (But make sure the line numbers don't get in the
> way of being able to copy-paste the text straight into gnuplot.)

And one more wish, actually: Could you update it to use 4.4 instead of 4.2?

Since someone on the channel has asked already, you might want to put some
contact info, or a contact-me page on the website. If you don't mind
sharing your code, others may be interested.

Re: [Gnuplot-info] Plotshare: online interface for gnuplot

[Tait <gnu...@t4...>]

> Check it out -  http://www.plotshare.com http://www.plotshare.com
> ...

This looks pretty neat. Of course the first thing I did was:
	plot '-' with linespoints
	1 1
	2 1
	3 3
	4 2
	5 2.5
	6 3
	7 0
	8 1
	e

... and instead of the image I was expecting, I got:
	plot '-' with linespoints
	      ^
	"temp.plt", line 7: Bad data on line 2

	Gnuplot-Script

	set term png transparent nocrop enhanced
	set output 'Plot1.png'

	plot '-' with linespoints

	reset;

I'm not sure why it didn't work, but maybe you can fix it?

Thanks for the tool; I look forward to using it. As for a
wish-list... maybe syntax highlighting and line numbers in the
gnuplot-script section? (But make sure the line numbers don't get in the
way of being able to copy-paste the text straight into gnuplot.)

Re: [Gnuplot-info] sqrt symbol for sqrt(x+3) and sqrt(x)+3

[Thomas S. <t.s...@fz...>]

it's better to position the bar first and then the other stuff, otherwise
characters may overlap.

doesn't look good:
set title '{/Symbol @\326\140}@m{/Symbol \140}@+{/Symbol \140}3'

looks much better:
set title '{/Symbol @{\140\140\140\140}\326}m+3


Thomas Sefzick wrote:
> 
> you may position a bar
> {/Symbol \140}
> over the following character by aligning it to the actual character:
> 
> sqrt(x)+3:
> set title '{/Symbol @\326\140}x+3'
> 
> sqrt(x+3):
> set title '{/Symbol @\326\140}@x{/Symbol \140}@+{/Symbol \140}3'
> 
> 
> plotplot wrote:
>> 
>> Hello,
>> 
>> I use the Symbol font (see ps_guide.ps) with the following steps:
>> 
>> 
>> set terminal postscript eps enhanced
>> set ylabel '{/Symbol \326}x'
>> 
>> 
>> It will give sqrt sign and x.  √ x. But, the bar for the square root is
>> missing.
>> This is a problem for sqrt(x)+3 and sqrt(x+3),
>> is there any way to add the missing bar above the expression such as x?
>> 
>> Thanks.
>> tom
>> 
>> 
>> 
> 
> 

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Re: [Gnuplot-info] sqrt symbol for sqrt(x+3) and sqrt(x)+3

[Thomas S. <t.s...@fz...>]

you may position a bar
{/Symbol \140}
over the following character by aligning it to the actual character:

sqrt(x)+3:
set title '{/Symbol @\326\140}x+3'

sqrt(x+3):
set title '{/Symbol @\326\140}@x{/Symbol \140}@+{/Symbol \140}3'


plotplot wrote:
> 
> Hello,
> 
> I use the Symbol font (see ps_guide.ps) with the following steps:
> 
> 
> set terminal postscript eps enhanced
> set ylabel '{/Symbol \326}x'
> 
> 
> It will give sqrt sign and x.  √ x. But, the bar for the square root is
> missing.
> This is a problem for sqrt(x)+3 and sqrt(x+3),
> is there any way to add the missing bar above the expression such as x?
> 
> Thanks.
> tom
> 
> 
> 

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Re: [Gnuplot-info] Rotating X-Axis Labels

[Rich S. <rsh...@ap...>]

On Fri, 3 Jun 2011, BBands wrote:

> First you probably want
>    set format x "%d-%m-%Y"
> instead of
>    set format x "%d-%m-$Y"

   Oops! Thanks for catching the typo.

> and for rotation try
>    set xtics rotate

   That does it. I thought I had tried this but apparently not.

Much appreciated,

Rich

Re: [Gnuplot-info] Rotating X-Axis Labels

[BBands <bb...@gm...>]

First you probably want
    set format x "%d-%m-%Y"
instead of
    set format x "%d-%m-$Y"
and for rotation try
    set xtics rotate

>From 'help set xtics': "rotate asks gnuplot to rotate the text through
90 degrees, which will be done if the terminal driver in use supports
text rotation.  norotate cancels this. rotate by <ang> asks for
rotation by <ang> degrees, supported by some terminal types."

Best,

jab

On Fri, Jun 3, 2011 at 3:30 PM, Rich Shepard <rsh...@ap...> wrote:
>   I'm essentially new to gnuplot although I used it lightly a dozen or so years
> ago. I think it's the only tool that will allow me to plot a time series
> with dates as the labels on the x-axis tics.
>
>   While my script will be tuned to make it more presentable, the immediate
> need is to learn how to turn a date (such as 2009-05-13) 90 degrees
> counterclockwise and limit the number of labels on the x-axis range.
>
>   The plot is daily precipitation at a monitoring station over three years.
> The code is:
>
> set datafile missing "NA"
> set xdata time
> set timefmt "%Y-%m-%d"
> set format x "%d-%m-$Y"
> set nokey
> set xlabel "Date" rotate by 270
> set ylabel "Precipitation (in)"
> set title "Daily Precipitation 2008-2010: CC-OR-8"
> set size ratio -2
>
> plot "cocorahs.dat" u 1:($2) w boxes
>
>   The first few lines of the data file are:
>
> 2008-01-01 NA
> 2008-01-02 0.06
> 2008-01-03 0.60
> 2008-01-04 0.27
> 2008-01-05 0.56
> 2008-01-06 0.20
> 2008-01-07 0.44
>
>   I can provide the entire data file (all 920 lines, 15K) if desired. Please
> point me in the right direction for adjusting the x-axis labels so they are
> both readable and complete (rather than the current "05-13-%Y".
>
> Rich
>
>
> ------------------------------------------------------------------------------
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>



-- 
John Bollinger, CFA, CMT
www.BollingerBands.com

If you advance far enough, you arrive at the beginning.

[Gnuplot-info] Rotating X-Axis Labels

[Rich S. <rsh...@ap...>]

   I'm essentially new to gnuplot although I used it lightly a dozen or so years
ago. I think it's the only tool that will allow me to plot a time series
with dates as the labels on the x-axis tics.

   While my script will be tuned to make it more presentable, the immediate
need is to learn how to turn a date (such as 2009-05-13) 90 degrees
counterclockwise and limit the number of labels on the x-axis range.

   The plot is daily precipitation at a monitoring station over three years.
The code is:

set datafile missing "NA"
set xdata time
set timefmt "%Y-%m-%d"
set format x "%d-%m-$Y"
set nokey
set xlabel "Date" rotate by 270
set ylabel "Precipitation (in)"
set title "Daily Precipitation 2008-2010: CC-OR-8"
set size ratio -2

plot "cocorahs.dat" u 1:($2) w boxes

   The first few lines of the data file are:

2008-01-01 NA
2008-01-02 0.06
2008-01-03 0.60
2008-01-04 0.27
2008-01-05 0.56
2008-01-06 0.20
2008-01-07 0.44

   I can provide the entire data file (all 920 lines, 15K) if desired. Please
point me in the right direction for adjusting the x-axis labels so they are
both readable and complete (rather than the current "05-13-%Y".

Rich

[Gnuplot-info] Plotshare: online interface for gnuplot

[vertex <ben...@gm...>]

Hey guys,

about a year ago I was experimenting with new web application frameworks
(orbit for lua as a substitute for php). As a toy project I came up with a
gnuplot online interface.
The idea came to my mind when I was working with a friend on our physics
experiment analysis. I wanted to show him plots without always sending him
the plot itself or the plot file. (We are using gnuplot a lot for fitting
and stuff).

Now I am convinced that there are still a lot of bugs in the system and I
haven´t figured out a lot of security issues yet, but I want to know your
opinion about it. Maybe I can gather a list of "want to" features or
improvements that I can work into it.

Check it out -  http://www.plotshare.com http://www.plotshare.com 
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Re: [Gnuplot-info] question on postscript terminal

[<die...@t-...>]

Dear listmembers,
I found a working solution now - could have seen this earlier:

simply put a @x^{-} and this will give a x with a bar on top - because @x is interpreted as a character with zero width.

Anyway, thanks to everyone who was listening to me - probably some other person can make use of this.

Take care




Dieter Jurzitza

-----Original-Nachricht-----
> Subject: Re: [Gnuplot-info] question on postscript terminal
> Date: Mon, 30 May 2011 11:28:54 +0200
> From: "Marek W. Gutowski" <gu...@if...>
> To: "die...@t-..." <die...@t-...>

> First of all you should use 'postscript enhanced' terminal.
***************

[Gnuplot-info] question on postscript terminal

[<die...@t-...>]

Dear listmembers,
does anyone know whether there is a possibility to put a bar over a character using the postscript terminal? I would like to use the postscript equivalent of  $\bar{x}$ from TeX in order to depict an average value within my graph - but I could not find an hint on how to do this in the  documentation of the gnuplot postscript terminal, probably I missed something (or it is simply impossible ...).

Thank you very much for your efforts,
take care



Dieter Jurzitza

Re: [Gnuplot-info] Variable line spacing in titles?

[Vik R. <vi...@mi...>]

Here's an example of a way I have found to do this:

unset title
set label '{/=16 Title Line 1}'   at 6.5, 11.25 center offset 0, 2.5
set label '{/=16 Title Line 2}'   at 6.5, 11.25 center offset 0, 0.5

Best,


-Vik



On May 29, 2011, at 6:48 AM, mc...@gm... wrote:

> Thanks!
> 
> Does anybody know any details about how to variably set the line spacing in titles? Since I use the "enhanced" mode with exponents, the exponents overlap with the previous line, so I would be happy to increase the line spacing. On the other hand, inserting an empty line would be way too much.
> 
> Thank you very much and best regards!
> 
> Yukti
> 
> 
> On May 28, 2011, at 2:05 PM, gnu...@li... wrote:
> 
>> 
>> Message: 4
>> Date: Fri, 27 May 2011 15:38:32 -0400
>> From: Andres Cimmarusti
>> Subject: Re: [Gnuplot-info] Multiple line in titles
>> To: gnu...@li...
>> Message-ID: <BAN...@ma...>
>> Content-Type: text/plain; charset=UTF-8
>> 
>> Hi Yukti,
>> 
>> Well, this is not a good solution but it may work. You can set any
>> label on the plot canvas using the "set label" command, for example:
>> 
>> set label 1 "second line of the title" , at 4,4
>> 
>> This puts the text "second line of the title" starting at point (4,4)
>> on the canvas/plot area.
>> 
>> The catch is you'll have to play with the coordinates until you get it right...
>> 
>> If I find something else I'll let you know
>> 
>> Good luck
>> 
>> Andr?s
>> 
>> PS: sorry for the delayed response, I'm subscribed to digest mode and
>> only today I got your message...perhaps other people have already
>> replied that I'm unaware of
>> 
> 
> ------------------------------------------------------------------------------
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> you get blazing-fast, flexible, and affordable data protection.
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Re: [Gnuplot-info] Variable line spacing in titles?

[Hans-Bernhard B. <HBB...@t-...>]

On 29.05.2011 15:48, mc...@gm... wrote:

> Does anybody know any details about how to variably set the line
> spacing in titles? Since I use the "enhanced" mode with exponents,
> the exponents overlap with the previous line, so I would be happy to
> increase the line spacing. On the other hand, inserting an empty line
> would be way too much.

It's not entirely clear what kind of titles you're referring to.  If 
it's the titles of individual data sets, see the "height <increment>" 
option in "help set key".

[Gnuplot-info] Variable line spacing in titles?

[<mc...@gm...>]

Thanks!

Does anybody know any details about how to variably set the line spacing in titles? Since I use the "enhanced" mode with exponents, the exponents overlap with the previous line, so I would be happy to increase the line spacing. On the other hand, inserting an empty line would be way too much.

Thank you very much and best regards!

Yukti


On May 28, 2011, at 2:05 PM, gnu...@li... wrote:

> 
> Message: 4
> Date: Fri, 27 May 2011 15:38:32 -0400
> From: Andres Cimmarusti
> Subject: Re: [Gnuplot-info] Multiple line in titles
> To: gnu...@li...
> Message-ID: <BAN...@ma...>
> Content-Type: text/plain; charset=UTF-8
> 
> Hi Yukti,
> 
> Well, this is not a good solution but it may work. You can set any
> label on the plot canvas using the "set label" command, for example:
> 
> set label 1 "second line of the title" , at 4,4
> 
> This puts the text "second line of the title" starting at point (4,4)
> on the canvas/plot area.
> 
> The catch is you'll have to play with the coordinates until you get it right...
> 
> If I find something else I'll let you know
> 
> Good luck
> 
> Andr?s
> 
> PS: sorry for the delayed response, I'm subscribed to digest mode and
> only today I got your message...perhaps other people have already
> replied that I'm unaware of
> 

[Gnuplot-info] gnuplot and libgd

[Keith L. <ke...@kl...>]

gnuplot depends on libgd.  libgd.org has been down for a few
months now, and the libgd library has gotten inadequate love
and attention since Tom Boutell handed it over to Pierre Joye
and the PHP community a few years ago.

libgd is useful for some primitive kinds of graphics that are
difficult to do with gnuplot. For example, I use it to draw
graphic annotations on gnuplot images.  So besides it being a
dependency, it is a useful additional tool for gnuplot users. 
But if it goes away ...

Perhaps there are others here who would like to explore libgd,
and perhaps help maintain it.  Most serious programming is
beyond my skillset, but there may be other ways I can
contribute (documentation, etc).

Keith

-- 
Keith Lofstrom          ke...@ke...         Voice (503)-520-1993
KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs

Re: [Gnuplot-info] Problems with plot data in Windows 7

[Hans-Bernhard B. <HBB...@t-...>]

On 28.05.2011 12:46, felipe rodriguez wrote:
> *"cargasdistribuidas.gnu",line 6:warning:Skipping unreadable flie
> "C:Placasmalla.dat"*

The reason for that message is that those:

> *plot "C:\Placas\malla.dat","C:\Placas\cargasdistribuidas.dat" lt -1

are the wrong way to spell pathnames in gnuplot on Windows.  The 
backslash character has special meaning in "double quoted" strings in 
gnuplot (see "help quotes").  You want to write one of the following 
instead:

	"C:\\Placas\\malla.dat"
	'C:\Placas\malla.dat'
	"C:/Placas/malla.dat"
	'C:/Placas/malla.dat'

You might also want to consider changing to the folder you're actually 
working in, rather than running in gnuplot's installation directory, 
where you really should not be keeping your data files.  Either do that 
from the outside, before you start gnuplot, or 'cd' inside gnuplot (see 
"help cd").

Or, if you consistently keep all your files in a few fixed places, you 
might want to consider setting the GNUPLOT_LIB environment variable to 
let it find them there by default (see "help environment").

[Gnuplot-info] Problems with plot data in Windows 7

[felipe r. <fel...@gm...>]

Hi everybody, I'm try plot file data from gnuplot in Windows Seven, but, if
I have a file of data in same folder of gnuplot I haven't problem. But, if I
like plot file in the other folder I have a problem because I get
the following message:


*>load('cargasdistribuidas.gnu') *
*"cargasdistribuidas.gnu",line 6:warning:Skipping unreadable flie
"C:Placasmalla.dat"*
*"cargasdistribuidas.gnu",line 6:warning:Skipping unreadable flie
"C:Placascargasdistribuidas.dat"*
*"cargasdistribuidas.gnu",line 6:No data in plot*

The file cargasdistribuidas.gnu is:

*set yrange[] reverse*
*set title "Cargas distribuidas"
set nokey*
*plot "C:\Placas\malla.dat","C:\Placas\cargasdistribuidas.dat" lt -1
pause mouse*

I tried to change the path to C:\Users\FELIPE\Desktop instead of C:\Placas
but don't work, but if I change the line:
*plot "malla.dat","cargasdistribuidas.dat" lt -1*
And, I put the gnuplot.exe in the same folder of malla.dat and
cargasdistribuidas.dat don't problem!

Any Idea?

Thanks and Regards

-- 
----------------------------------------------------------
FELIPE RODRÍGUEZ FONTE
ESTUDIANTE DE ING.INDUSTRIAL
UNIVERSIDAD DE LAS PALMAS DE G.C
fel...@gm...

Re: [Gnuplot-info] how to change sequence in the key?

[Hans-Bernhard B. <HBB...@t-...>]

On 28.05.2011 00:15, Jon wrote:
> Just liked the color sequence and lazy to add more words to specify color
> when changing the plotting sequence.

And how else, if not by "adding more words" do you think you would be 
going to specify that non-default key sequence, then?

> The concerns is not just that, I suppose the ability to specific sequence in
> the key should be included in 'plot' command ...

And you really haven't given any good reason why.

Re: [Gnuplot-info] how to change sequence in the key?

[Jon <dev...@gm...>]

Just liked the color sequence and lazy to add more words to specify color
when changing the plotting sequence.

The concerns is not just that, I suppose the ability to specific sequence in
the key should be included in 'plot' command ...



2011/5/25 Hans-Bernhard Bröker <HBB...@t-...>

> On 25.05.2011 17:37, Jon wrote:
>
>  I specify titles in the plot command, and let them be displayed in the key
>> box. But I would like to change the sequence of the titles in the key box,
>> say, the title to the second plot be shown as the first in the key box.
>>
>
> Hmmm.... and how would the result differ from that you can get just
> changing the sequence of datasets inside the 'plot' command?
>

Re: [Gnuplot-info] Multiple line in titles

[Andres C. <aci...@gm...>]

Hi Yukti,

Well, this is not a good solution but it may work. You can set any
label on the plot canvas using the "set label" command, for example:

set label 1 "second line of the title" , at 4,4

This puts the text "second line of the title" starting at point (4,4)
on the canvas/plot area.

The catch is you'll have to play with the coordinates until you get it right...

If I find something else I'll let you know

Good luck

Andrés

PS: sorry for the delayed response, I'm subscribed to digest mode and
only today I got your message...perhaps other people have already
replied that I'm unaware of

Re: [Gnuplot-info] Align zeros in Y1 and Y2 axes

[Thomas S. <t.s...@fz...>]

you set everything except 'terminal' and 'output'.
then you do the dummy plot, calculate and set the 'y2range',
set 'terminal' and 'output', plot again.

an example:

reset
set ytics nomirror
set y2tics
set xzeroaxis
set output
# dummy plot
set terminal dumb
plot x-2 axes x1y1, x+5 axes x1y2
# now all the variables are set
# prepare for the real plot
set terminal png
set output "test.png"
# assumption: both yranges contain 'zero'
# otherwise the calculation would be more complicated
yd=GPVAL_Y_MAX-GPVAL_Y_MIN
y2d=GPVAL_Y2_MAX-GPVAL_Y2_MIN
yu=-GPVAL_DATA_Y_MIN/yd
yo=GPVAL_DATA_Y_MAX/yd
y2u=-GPVAL_DATA_Y2_MIN/y2d
y2o=GPVAL_DATA_Y2_MAX/y2d
temp=yo/yu*y2u
y2o=temp>y2o?temp:y2o
temp=yu/yo*y2o
y2u=temp>y2u?temp:y2u
set y2range [-y2u*y2d:y2o*y2d]
# do the real plot
replot
set output


acsg wrote:
> 
> Thank you for your reply.
> 
> I'm rather new to gnuplot , so I don't quite get what I am supposed to do.
> I am using a script in order to do a plot for some files. The script is as
> follows:
> 
> 
> for file in $*
> do
> gnuplot <<EOF
> set terminal png
> set output "$1.png"
> set key out vert
> set key bot center
> set title "Packet Loss Estimation for: $1"
> set timefmt "%s"
> set xdata time
> set ylabel "Time gaps (sec)"
> set y2label "Lost Packets"
> set ytics border
> set y2tics border
> set xtics rotate by 90 border offset 0,-4
> set style line 1 lt rgb "gray" lw 7
> set style line 2 lt rgb "black" lw 2
> plot "$1" using 1:2 ls 1 title "Time gaps" axes x1y1 with lines, "$1"
> using 1:3 ls 2 title "Packet Losses" axes x1y2 with impulses
> EOF
> done
> 
> I'm still confused as to where am I supposed to create the dummy plot and
> if it will affect the output that I need (in the script, marked as
> $i.png).
> 
> Thank you again for your time and help.
> 
> 
> 

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Re: [Gnuplot-info] Align zeros in Y1 and Y2 axes

[acsg <so...@cc...>]

Thank you for your reply.

I'm rather new to gnuplot , so I don't quite get what I am supposed to do. I
am using a script in order to do a plot for some files. The script is as
follows:


for file in $*
do
gnuplot <<EOF
set terminal png
set output "$1.png"
set key out vert
set key bot center
set title "Packet Loss Estimation for: $1"
set timefmt "%s"
set xdata time
set ylabel "Time gaps (sec)"
set y2label "Lost Packets"
set ytics border
set y2tics border
set xtics rotate by 90 border offset 0,-4
set style line 1 lt rgb "gray" lw 7
set style line 2 lt rgb "black" lw 2
plot "$1" using 1:2 ls 1 title "Time gaps" axes x1y1 with lines, "$1" using
1:3 ls 2 title "Packet Losses" axes x1y2 with impulses
EOF
done

I'm still confused as to where am I supposed to create the dummy plot and if
it will affect the output that I need (in the script, marked as $i.png).

Thank you again for your time and help.


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Re: [Gnuplot-info] Align zeros in Y1 and Y2 axes

[Thomas S. <t.s...@fz...>]

doing a plot sets some variables which can be useful
(see 'show variables all').

interesting for you are
GPVAL_Y_MIN
GPVAL_Y_MAX
GPVAL_Y2_MIN
GPVAL_Y2_MAX

because these are set during a plot you need to make a dummy plot
first, e.g. plotting to the text terminal:

reset
set terminal push
set terminal dumb
plot ... axes x1y1, ... axes x1y2
set terminal pop
# then adjust y2range using the above variables
...
# and plot again
replot


acsg wrote:
> 
> Hello,
> 
> I have a plot that uses one set of data for the x axis, and two different
> sets for each y1 and y2 axes. All of the axes are set to autoscale
> (because I'm using this script for over 100 different files and I can't
> know all their ranges).
> 
> I would like for the "zero" of both Y axes to be aligned and I can't seem
> to manage how to do it. I'd very much appreciate your help.
> 
> Thanks!
> 

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Re: [Gnuplot-info] I need call gnuplot from Windows SO

[Hans-Bernhard B. <HBB...@t-...>]

On 26.05.2011 13:37, felipe rodriguez wrote:

> I try run gnuplot from a fortran program in Windows SO.

I've no idea what Windows "SO" is supposed to refer to.  Ah well.

> CALL SYSTEM('gnuplot>  load"proc.txt"')

What you're really looking for is probably

	CALL SYSTEM('gnuplot proc.txt')

But make sure to check out "help batch" from inside gnuplot for the details.

Re: [Gnuplot-info] I need call gnuplot from Windows SO

[BBands <bb...@gm...>]

There are several gnuplot/FORTRAN interfaces for you to chose from
that might help.

Try "batch/interactive" in help for some ideas on invoking gnuplot.
Also the introduction, windows and files entries might be of help.

Best,

     jab

Re: [Gnuplot-info] Plotting the factorial of x?

[Thomas S. <t.s...@fz...>]

n! for non-integers - maybe the gamma() function?

set terminal ... enhanced
should give proper subscripts - if the specific terminal supports
enhanced text.


breakfast_jimmy wrote:
> 
> Well, first of all, thank you for taking the time to read this message.
> Ok, so basically, I need to plot the sum of n against n, where S_n is
> ((log(2))**n)/n!. I figured substituting x for n would work, but alas!
> Factorials obviously need to be integers. Is there any way around this? 
> Thank you.
> 
> Oh, and also, when labeling the axis as S_n, how would I set the subscript
> to display properly? Thanks in advance.
> 
> 

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