Re: [PHP] sprintf thousand separator.
2009/2/11 João Cândido de Souza Neto j...@consultorweb.cnt.br: Hello everybody. I´d just like to know if there´s any way of defining a thousand separator to a currency value using sprintf. Use number_format instead of sprintf, it's designed to do what you want. -- Postgresql php tutorials http://www.designmagick.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
Chris, Thanks for your answer, but my real problem is to get thousand separator in jpgraph class which uses sprintf to display almost everithing; chris smith dmag...@gmail.com escreveu na mensagem news:3c1395330902110457i18cec69cy9818e08cdd3ff...@mail.gmail.com... 2009/2/11 João Cândido de Souza Neto j...@consultorweb.cnt.br: Hello everybody. I´d just like to know if there´s any way of defining a thousand separator to a currency value using sprintf. Use number_format instead of sprintf, it's designed to do what you want. -- Postgresql php tutorials http://www.designmagick.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
chris smith wrote: 2009/2/11 João Cândido de Souza Neto j...@consultorweb.cnt.br: Hello everybody. I´d just like to know if there´s any way of defining a thousand separator to a currency value using sprintf. Use number_format instead of sprintf, it's designed to do what you want. I wonder why number_format() isn't locale sensitive? /Per -- Per Jessen, Zürich (2.4°C) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
Thanks for your answer, but my real problem is to get thousand separator in jpgraph class which uses sprintf to display almost everithing; Can you format it first, and then pass it to JPGraph ? -- Richard Heyes HTML5 Canvas graphing for Firefox, Chrome, Opera and Safari: http://www.rgraph.org (Updated January 31st) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
No, I can´t, because if I do it how can jpgrhph render without numeric data? hehehe Richard Heyes rich...@php.net escreveu na mensagem news:af8726440902110523x63ce5485p6534d10063eb4...@mail.gmail.com... Thanks for your answer, but my real problem is to get thousand separator in jpgraph class which uses sprintf to display almost everithing; Can you format it first, and then pass it to JPGraph ? -- Richard Heyes HTML5 Canvas graphing for Firefox, Chrome, Opera and Safari: http://www.rgraph.org (Updated January 31st) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
Can you extend the JPGraph class, intercepting the desired method, formatting the output the way you need? 2009/2/11 João Cândido de Souza Neto j...@consultorweb.cnt.br No, I can´t, because if I do it how can jpgrhph render without numeric data? hehehe Richard Heyes rich...@php.net escreveu na mensagem news:af8726440902110523x63ce5485p6534d10063eb4...@mail.gmail.com... Thanks for your answer, but my real problem is to get thousand separator in jpgraph class which uses sprintf to display almost everithing; Can you format it first, and then pass it to JPGraph ? -- Richard Heyes HTML5 Canvas graphing for Firefox, Chrome, Opera and Safari: http://www.rgraph.org (Updated January 31st) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf thousand separator.
Ok, thanks. I´ll try to do it. As soon as I get it I´ll let you know. Thanks guys. Bruno Fajardo bsfaja...@gmail.com escreveu na mensagem news:eeb6980b0902110534p22a8c75eqd98cceaf3a150...@mail.gmail.com... Can you extend the JPGraph class, intercepting the desired method, formatting the output the way you need? 2009/2/11 João Cândido de Souza Neto j...@consultorweb.cnt.br No, I can´t, because if I do it how can jpgrhph render without numeric data? hehehe Richard Heyes rich...@php.net escreveu na mensagem news:af8726440902110523x63ce5485p6534d10063eb4...@mail.gmail.com... Thanks for your answer, but my real problem is to get thousand separator in jpgraph class which uses sprintf to display almost everithing; Can you format it first, and then pass it to JPGraph ? -- Richard Heyes HTML5 Canvas graphing for Firefox, Chrome, Opera and Safari: http://www.rgraph.org (Updated January 31st) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf problem... (with simplified code )
Sorry, this morning I have gone through everything again, and the
simplified example was wrong, but corrected it gives the right answer,
however although I'm sure I've done the same with the main script I can
not get the correct answer.
I need to round each article seperatly so that the Vat inc prince
remains the same.
So a 10.03 without vat always makes 12.00 with vat.
My test files works as it should :
?php
$total = 0;
$ht = 10.03;
$vat = 19.6;
$total += sprintf(%0.2f,$ht*($vat/100+1));
print(Total = .sprintf(%0.2f,$total));
$total += sprintf(%0.2f,$ht*($vat/100+1));
print( - Total 2 = .sprintf(%0.2f,$total));
?
Result : Total : 12 - Total 2 : 24
However the file I'm working on does not :(
The script I'm working on makes use of the fpdf php project which
automaticaly creates PDF files.
Here is the extract of code :
while ( list($code_tva, $articleHT) = each( $px ) )
{
$tva = $tab_tva[$code_tva]; // is 19.6 %
$this-SetXY(15, $y); //sets the coordinates of cell to be created in
PDF file for each item )
$this-Cell( 21.5,4, sprintf(%0.2f, $articleHT),'', '','C' ); //
inserts the item
//= $totalHT is TOTAL without VAT and
$articleHT is a table which contains the price of each item without tax
$totalHT += $articleHT; //adds all items without vat
//= $totalTTC is TOTAL with VAT
$totalTTC += sprintf(%0.2f, ($articleHT * ( 1 + $tva/100 ))); // adds
the rounded (item * 1.196) (including vat)
//= $totalTVA is TOTAL of VAT
$tmp_tva = sprintf(%0.2f,$articleHT * $tva/100); //amount of VAT of
current item
$a_tva[ $code_tva ] = $tmp_tva;
$totalTVA += $tmp_tva; //adds current item's vat to total vat
$this-SetXY(10, $y);
$this-Cell( 5,4, $code_tva, 0,0,C); //prints vat option
$this-SetXY(58, $y);
$this-Cell( 21.5,4, sprintf(%0.2f,$tmp_tva),'', '' ,'C'); //prints
the current item's vat amount
$this-SetXY(79.5, $y);
$this-Cell( 21.5,4, sprintf(%0.2f,$tva) ,'', '', 'C'); //prints the
vat percentage for item
$y+=4;
}
$this-SetXY(114,266.4);
$this-Cell(15,4, sprintf(%0.2f, $totalHT), '', '', 'R' ); //prints
the total amount excluding vat
$this-SetXY(114,271.4);
$this-Cell(15,4, sprintf(%0.2f, $totalTVA), '', '', 'R' ); //prints
total amount including vat
This is how I see it :
If I have two different items ($articleHT) at 10.03 this line ($tva =
19.6 and $articleHT = 10.03) :
$totalTTC += sprintf(%0.2f, ($articleHT * ( 1 + $tva/100 )));
Should add 12.00 to $totalTTC However it seems to add 11.99588 to
$totalTTC instead ...
In my test files it does exactly this, any idea why it would not do this
in the real file ?
Thanks again :)
lists-php a écrit :
your issue is with rounding, and whether vat is applied (rounded)
per-item or on the invoice total.
your sprintf output is simply truncating and rounding on display. you
aren't storing the rounded (up) value.
increase the decimal positions to 4 or 6 and you'll see things better.
Total = 11.995880 - Total 2 = 23.991760
the vat on 10.03 is 1.96588, which when you only display 2 positions
on display rounds up to 1.97.
if you stored the rounded value ,on a per-item basis, you'd get what
you're after.
now, the question is whether vat is applied per item or on the
invoice total.
the difference becomes more obvious with say 3 items, at 10.03. on a
(rounded) per-item basis the vat total would be 5.91. on an invoice
total it would be 5.90 (rounded up from 5.89784).
- Rick
Original Message
Date: Saturday, March 22, 2008 10:35:12 PM +0100
From: Richard [EMAIL PROTECTED]
To: PHP lists php-general@lists.php.net
Cc:
Subject: Re: [PHP] sprintf problem... (with simplified code )
Here is a simplifie version of my code :
?php
$total = 0;
$ht = 10.03;
$vat = 19.6;
$total += $ht*($vat/100+1);
print(Total = .sprintf(%0.2f, $total));
$total += $ht*($vat/100+1);
print( - Total 2 = .sprintf(%0.2f, $total));
?
I get 12.00 and 23.99 ... what should I do to get 12.00 and 24.00 ?
Richard a écrit :
Hello, I'm trying to write a invoice script but I have encountered
a slight problem.
Each product needs to be listed without tax, and at the end of the
file I need to show the VAT. In France VAT is 19.6%
So €10.03 without vat = €12.00 with vat.
So I do this :
$totalwithoutvat = 0;
$totalwithoutvat = 0;
$totalvat =0;
while ( $itemwithoutvat) = each( $px ) )
{
$totalwithoutvat += $itemwithoutvat;
$totalwithoutvat += sprintf(%0.2f, $itemwithoutvat * ( 1 +
19.6/100 )); $totalvat += sprintf(%0.2f,$itemwithoutvat *
19.6/100); }
print (Total Vat =.sprintf(%0.2f,$totalvat). - Total without
vat = .sprintf(%0.2f,$totalwithoutvat). - Total with vat =
.sprintf(%0.2f,$totalwithvat));
But I'm not sure I am using sprintf correctly, maybe I should use
a different function because :
When I have one item at 10.03, the result is : Total Vat = 1.97 -
Total without vat = 10.03 Total with vat = 12.00
but if I have two items at 10.03 the result is : Total vat
Re: [PHP] sprintf problem...
On Sat, Mar 22, 2008 at 3:37 PM, Richard [EMAIL PROTECTED] wrote: [snip=code!] When I have one item at 10.03, the result is : Total Vat = 1.97 - Total without vat = 10.03 Total with vat = 12.00 but if I have two items at 10.03 the result is : Total vat = 3.93 - Total without vat = 20.06 Total with vat = 23.99 but I need it to be : Total vat = 3.94 - Total without vat = 20.06 Total with vat = 24.00 Check your math, Richard. You're using sprintf() with the float correctly, you're just missing how it's rounding. (10.03 * 19.6) / 100 = 1.96588 (rounded to 1.97) ((10.03 * 19.6) / 100) * 2 = 3.93176 (rounded to 3.93) If you want it to come out to an even number with the VAT added, simply round the amount first, then multiply it. -- /Daniel P. Brown Forensic Services, Senior Unix Engineer 1+ (570-) 362-0283 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf problem...
Hello, I'm trying to write a invoice script but I have encountered a
slight problem.
Each product needs to be listed without tax, and at the end of the file
I need to show the VAT. In France VAT is 19.6%
So €10.03 without vat = €12.00 with vat.
So I do this :
$totalwithoutvat = 0;
$totalwithoutvat = 0;
$totalvat =0;
while ( $itemwithoutvat) = each( $px ) )
{
$totalwithoutvat += $itemwithoutvat;
$totalwithoutvat += sprintf(%0.2f, $itemwithoutvat * ( 1 + 19.6/100 ));
$totalvat += sprintf(%0.2f,$itemwithoutvat * 19.6/100);
}
print (Total Vat =.sprintf(%0.2f,$totalvat). - Total without vat =
.sprintf(%0.2f,$totalwithoutvat). - Total with vat =
.sprintf(%0.2f,$totalwithvat));
But I'm not sure I am using sprintf correctly, maybe I should use a
different function because :
When I have one item at 10.03, the result is : Total Vat = 1.97 - Total
without vat = 10.03 Total with vat = 12.00
but if I have two items at 10.03 the result is : Total vat = 3.93 -
Total without vat = 20.06 Total with vat = 23.99
but I need it to be : Total vat = 3.94 - Total without vat = 20.06 Total
with vat = 24.00
So from what I can see, sprintf only seems to work for printing and the
actual result is kept in memory, is this correct ? if so what function
should I use instead?
Thanks in advance :)
Richard
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf problem... (with simplified code )
Here is a simplifie version of my code :
?php
$total = 0;
$ht = 10.03;
$vat = 19.6;
$total += $ht*($vat/100+1);
print(Total = .sprintf(%0.2f, $total));
$total += $ht*($vat/100+1);
print( - Total 2 = .sprintf(%0.2f, $total));
?
I get 12.00 and 23.99 ... what should I do to get 12.00 and 24.00 ?
Richard a écrit :
Hello, I'm trying to write a invoice script but I have encountered a
slight problem.
Each product needs to be listed without tax, and at the end of the
file I need to show the VAT. In France VAT is 19.6%
So €10.03 without vat = €12.00 with vat.
So I do this :
$totalwithoutvat = 0;
$totalwithoutvat = 0;
$totalvat =0;
while ( $itemwithoutvat) = each( $px ) )
{
$totalwithoutvat += $itemwithoutvat;
$totalwithoutvat += sprintf(%0.2f, $itemwithoutvat * ( 1 + 19.6/100 ));
$totalvat += sprintf(%0.2f,$itemwithoutvat * 19.6/100);
}
print (Total Vat =.sprintf(%0.2f,$totalvat). - Total without vat
= .sprintf(%0.2f,$totalwithoutvat). - Total with vat =
.sprintf(%0.2f,$totalwithvat));
But I'm not sure I am using sprintf correctly, maybe I should use a
different function because :
When I have one item at 10.03, the result is : Total Vat = 1.97 -
Total without vat = 10.03 Total with vat = 12.00
but if I have two items at 10.03 the result is : Total vat = 3.93 -
Total without vat = 20.06 Total with vat = 23.99
but I need it to be : Total vat = 3.94 - Total without vat = 20.06
Total with vat = 24.00
So from what I can see, sprintf only seems to work for printing and
the actual result is kept in memory, is this correct ? if so what
function should I use instead?
Thanks in advance :)
Richard
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
On Dec 1, 2007 11:30 AM, tedd [EMAIL PROTECTED] wrote: At 7:10 AM -0500 12/1/07, Christoph Boget wrote: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? The 4th significant digit in both cases is '5' but in the first case, it's rounded down but in the second case it is rounded up. Is sprintf() basing it's decision on the value of the 3rd significant digit? If so, why? Shouldn't rounding decisions be based on subsequent digits and not preceding ones? I am using PHP 4.3.11 thnx, Christoph Actually, it's more accurate to use the preceding digit to determine rounding. What you describe is if even then round down else round up. That's more accurate than always rounding up or always rounding down. Please follow: When the digit is zero, no rounding takes place. When the digit is 1 - 4, round down. When the digit is 6 - 9, round up. Fine up to there -- but, if you always round up or down for 5, then you are introducing bias. So, if you use the even/odd value of the preceding digit to determine which way to round for 5, then it's more accurate. However, no rounding is accurate -- it's just that some methods are less error prone. Here's a demo: http://www.webbytedd.com/bbb/rounding/ My rounding method doesn't always win against php's round(), but it wins more times than not. Plus, it takes a lot of rounding to introduce the bias I found and thus for most applications using the round() function (always round down) will suffice. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php Oh, man I'm having flashbacks to a flame war that broke out on a SQL Server board I read related to bankers rounding versus traditional rounding and which was more correct or accurate. :-) Andrew -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
At 2:04 PM -0500 12/3/07, Andrew Ballard wrote: Oh, man I'm having flashbacks to a flame war that broke out on a SQL Server board I read related to bankers rounding versus traditional rounding and which was more correct or accurate. :-) Andrew There really shouldn't be a debate on which is more accurate, because that's easily enough to determine. One can argue if it makes a difference, or doing it more correctly takes too much time, or other such considerations, but how accurate is usually determined as the least amount of error produced by a given calculation method. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
On Dec 3, 2007 3:29 PM, tedd [EMAIL PROTECTED] wrote: At 2:04 PM -0500 12/3/07, Andrew Ballard wrote: Oh, man I'm having flashbacks to a flame war that broke out on a SQL Server board I read related to bankers rounding versus traditional rounding and which was more correct or accurate. :-) Andrew There really shouldn't be a debate on which is more accurate, because that's easily enough to determine. One can argue if it makes a difference, or doing it more correctly takes too much time, or other such considerations, but how accurate is usually determined as the least amount of error produced by a given calculation method. Cheers, tedd Which is more accurate? Neither - they're both wrong. :-P Uh oh. I may have ignited what I wanted to avoid. Seriously, though, you're probably right. I can't find the thread now, but I seem to recall that the bulk of the discussion centered around someone on the list arguing that the difference between each method was so small that the benefit was negligible, especially compared to the overhead of using a custom function in SQL Server to do what the client asked (to use banker's rounding) versus using the native ROUND function. After all, clients can be so irritating when they expect you to build a system the way they want it. :-) Andrew -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
The 4th significant digit in both cases is '5' but in the first case, it's rounded down but in the second case it is rounded up. Is sprintf() basing it's decision on the value of the 3rd significant digit? If so, why? Shouldn't rounding decisions be based on subsequent digits and not preceding ones? Actually, it's more accurate to use the preceding digit to determine rounding. What you describe is if even then round down else round up. That's more accurate than always rounding up or always rounding down. Please follow: When the digit is zero, no rounding takes place. When the digit is 1 - 4, round down. When the digit is 6 - 9, round up. Ok, I understand what's gong on but still not why. Fine up to there -- but, if you always round up or down for 5, then you are introducing bias. Fair point except... So, if you use the even/odd value of the preceding digit to determine which way to round for 5, then it's more accurate. My rounding method doesn't always win against php's round(), but it wins more times than not. Plus, it takes a lot of rounding to introduce the bias I found and thus for most applications using the round() function (always round down) will suffice. ...consider the following example: script language=php echo 'h3sprintf() test:brbr'; echo 'sprintf( %.03f, 0.20375000 ) = ' . sprintf( '%.03f', 0.20375000 ) . 'br'; echo 'sprintf( %.03f, 0.17318750 ) = ' . sprintf( '%.03f', 0.17318750 ) . 'br'; echo 'sprintf( %.03f, 0.15485000 ) = ' . sprintf( '%.03f', 0.15485000 ) . 'br'; echo 'sprintf( %.03f, 0.1525 ) = ' . sprintf( '%.03f', 0.1525 ) . 'br'; echo 'sprintf( %.03f, 0.12962500 ) = ' . sprintf( '%.03f', 0.12962500 ) . 'br'; echo 'sprintf( %.03f, 0.1159 ) = ' . sprintf( '%.03f', 0.1159 ) . 'br'; echo 'sprintf( %.03f, 0.1575 ) = ' . sprintf( '%.03f', 0.1575 ) . 'br'; echo 'sprintf( %.03f, 0.13387500 ) = ' . sprintf( '%.03f', 0.13387500 ) . 'br'; echo 'sprintf( %.03f, 0.1197 ) = ' . sprintf( '%.03f', 0.1197 ) . 'br'; echo 'sprintf( %.03f, 0.1525 ) = ' . sprintf( '%.03f', 0.1525 ) . 'br'; echo 'sprintf( %.03f, 0.12962500 ) = ' . sprintf( '%.03f', 0.12962500 ) . 'br'; echo 'sprintf( %.03f, 0.1159 ) = ' . sprintf( '%.03f', 0.1159 ) . 'br'; echo 'sprintf( %.03f, 0.07875000 ) = ' . sprintf( '%.03f', 0.07875000 ) . 'br'; echo 'sprintf( %.03f, 0.06693750 ) = ' . sprintf( '%.03f', 0.06693750 ) . 'br'; echo 'sprintf( %.03f, 0.05985000 ) = ' . sprintf( '%.03f', 0.05985000 ) . 'br'; echo 'sprintf( %.03f, 0.13125000 ) = ' . sprintf( '%.03f', 0.13125000 ) . 'br'; echo 'sprintf( %.03f, 0.13375000 ) = ' . sprintf( '%.03f', 0.13375000 ) . 'brbr'; echo 'h3round() test:brbr'; echo 'round( 0.20375000, 3 ) = ' . round( 0.20375000, 3 ) . 'br'; echo 'round( 0.17318750, 3 ) = ' . round( 0.17318750, 3 ) . 'br'; echo 'round( 0.15485000, 3 ) = ' . round( 0.15485000, 3 ) . 'br'; echo 'round( 0.1525, 3 ) = ' . round( 0.1525, 3 ) . 'br'; echo 'round( 0.12962500, 3 ) = ' . round( 0.12962500, 3 ) . 'br'; echo 'round( 0.1159, 3 ) = ' . round( 0.1159, 3 ) . 'br'; echo 'round( 0.1575, 3 ) = ' . round( 0.1575, 3 ) . 'br'; echo 'round( 0.13387500, 3 ) = ' . round( 0.13387500, 3 ) . 'br'; echo 'round( 0.1197, 3 ) = ' . round( 0.1197, 3 ) . 'br'; echo 'round( 0.1525, 3 ) = ' . round( 0.1525, 3 ) . 'br'; echo 'round( 0.12962500, 3 ) = ' . round( 0.12962500, 3 ) . 'br'; echo 'round( 0.1159, 3 ) = ' . round( 0.1159, 3 ) . 'br'; echo 'round( 0.07875000, 3 ) = ' . round( 0.07875000, 3 ) . 'br'; echo 'round( 0.06693750, 3 ) = ' . round( 0.06693750, 3 ) . 'br'; echo 'round( 0.05985000, 3 ) = ' . round( 0.05985000, 3 ) . 'br'; echo 'round( 0.13125000, 3 ) = ' . round( 0.13125000, 3 ) . 'br'; echo 'round( 0.13375000, 3 ) = ' . round( 0.13375000, 3 ) . 'brbr'; /script Why is the behavior of round() different to that of sprintf()? Both are rounding numbers. I'll grant you that sprintf() has more utility and does more things than round() but when you are dealing with numbers (and more specifically, when you've used a numeric type specifier in the format argument), sprintf() is doing the same type of thing to the value -- rounding. So why are they doing it differently? Is that a bug? I'm reticent to say that but it doesn't make sense to me that they would behave differently. If the general rule is to round up for 5s when preceeding is odd and round down when even, that's not occuring here when using round(). thnx, Christoph -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
At 6:08 AM -0500 12/2/07, Christoph wrote: If the general rule is to round up for 5s when preceeding is odd and round down when even, that's not occuring here when using round(). No, you're not reading what I wrote. I said MY general rule is to round up when the preceding digit is even, whereas php's round function always rounds down. As for sprint_f(), I haven't investigated that. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
2007/12/1, Christoph Boget [EMAIL PROTECTED]: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? Welcome to the world of f floating point numbers. Discrete mathematics, leave all hope, ye that enter. It's the way floating point number behave (a computational error that's more problematic that one may suspect). You'll have to live with it, or use an extension for arbitrary sized numbers (or fixed point numbers). Why we have to accept this kind of behavior? Long story short: they are excellent for computations required in 3d graphics, they are lousy for business applications... ...and we all know that computers are for playing 3d games, don't we? XD Sorry about the noise.
[PHP] sprintf() oddness
Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? The 4th significant digit in both cases is '5' but in the first case, it's rounded down but in the second case it is rounded up. Is sprintf() basing it's decision on the value of the 3rd significant digit? If so, why? Shouldn't rounding decisions be based on subsequent digits and not preceding ones? I am using PHP 4.3.11 thnx, Christoph
Re: [PHP] sprintf() oddness
Christoph Boget wrote: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? I am using PHP 4.3.11 I see the same behaviour in 5.2.4 /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
Per Jessen wrote: Christoph Boget wrote: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? most likely it's an artifact of the fact that the binary representations of those floating point values are not exact e.g. 0.1575 is represented in binary as something like 0.15751 something like that. I am using PHP 4.3.11 I see the same behaviour in 5.2.4 /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
Jochem Maas wrote: Per Jessen wrote: Christoph Boget wrote: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? most likely it's an artifact of the fact that the binary representations of those floating point values are not exact e.g. 0.1575 is represented in binary as something like 0.15751 something like that. I just tried it in plain C - same result. /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddness
At 7:10 AM -0500 12/1/07, Christoph Boget wrote: Why does sprintf( '%.03f', 0.1525 ) return 0.152 while sprintf( '%.03f', 0.1575 ) return 0.158? The 4th significant digit in both cases is '5' but in the first case, it's rounded down but in the second case it is rounded up. Is sprintf() basing it's decision on the value of the 3rd significant digit? If so, why? Shouldn't rounding decisions be based on subsequent digits and not preceding ones? I am using PHP 4.3.11 thnx, Christoph Actually, it's more accurate to use the preceding digit to determine rounding. What you describe is if even then round down else round up. That's more accurate than always rounding up or always rounding down. Please follow: When the digit is zero, no rounding takes place. When the digit is 1 - 4, round down. When the digit is 6 - 9, round up. Fine up to there -- but, if you always round up or down for 5, then you are introducing bias. So, if you use the even/odd value of the preceding digit to determine which way to round for 5, then it's more accurate. However, no rounding is accurate -- it's just that some methods are less error prone. Here's a demo: http://www.webbytedd.com/bbb/rounding/ My rounding method doesn't always win against php's round(), but it wins more times than not. Plus, it takes a lot of rounding to introduce the bias I found and thus for most applications using the round() function (always round down) will suffice. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf() oddity
What's going on here: $number = 50.1234567890; echo sprintf( '%.05f', $number ); result: 50.12346 $number = 5.1234567890; echo sprintf( '%.05f', $number ); result: 5.12305 $number = 5000.1234567890; echo sprintf( '%.05f', $number ); result: 5000.0 Why isn't it formatting the decimals properly? And apparently losing some? Running PHP 4.3.11 on Windows Server 2003 box. thnx, Chris
Re: [PHP] sprintf() oddity
You are going beyond the number of significant digits PHP can handle so it is truncating beyond that. In the second case it look sstrange, the 12305 ending, but it is probably a 'round' number if you put it in binary, but it turns funny when converted to decimal. In the last example, the precision does not even reach the decimal part. - Original Message - From: Chris Boget [EMAIL PROTECTED] To: php-general@lists.php.net Sent: Tuesday, April 18, 2006 5:19 PM Subject: [PHP] sprintf() oddity What's going on here: $number = 50.1234567890; echo sprintf( '%.05f', $number ); result: 50.12346 $number = 5.1234567890; echo sprintf( '%.05f', $number ); result: 5.12305 $number = 5000.1234567890; echo sprintf( '%.05f', $number ); result: 5000.0 Why isn't it formatting the decimals properly? And apparently losing some? Running PHP 4.3.11 on Windows Server 2003 box. thnx, Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf() oddity
On Tue, April 18, 2006 10:19 am, Chris Boget wrote: What's going on here: $number = 50.1234567890; echo sprintf( '%.05f', $number ); result: 50.12346 $number = 5.1234567890; echo sprintf( '%.05f', $number ); result: 5.12305 $number = 5000.1234567890; echo sprintf( '%.05f', $number ); result: 5000.0 Why isn't it formatting the decimals properly? And apparently losing some? Running PHP 4.3.11 on Windows Server 2003 box. PHP stores float/decimal numbers internally in 4-byte (32-bit) values using standard C float libraries. Rounding things off is guaranteed to produce results like this. Though the one that ends in .12305 is a bit odd... Still, if you NEED any sort of verifiable accuracy or especially large scale, you'll have to use a custom library that deals with decimal numbers as strings and allows you to choose arbitrary precision. You'll sacrifice speed, of course. And RAM. How much you sacrifice depends on how much accuracy you need, to some degree, but it's also just inherently slower and more resource-intensive to do all the calculations as strings. -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf and arrays.
On Wednesday 06 April 2005 18:05, Brent Baisley typed:
You want to have sprintf look at the contents of the variable instead
of the variable itself. Anytime you want to do something like this you
use the eval() function to evaluate the contents of the variable.
Woot!
$begin_string = 'htmlentities(sprintf($tmp[0],';
foreach ($p_sub_values as $k = $v) {
$mid_string[] = \$p_sub_values[$k];
}
$mid_string = join(',', $mid_string);
$end_string = '), ENT_QUOTES);';
// Eval will stick the three strings together and then execute them. Neat
trick, hint from
// [EMAIL PROTECTED]
eval (\$r = $begin_string$mid_string$end_string);
Works a treat. Thanks Brent.
--
My mind not only wanders, it sometimes leaves completely.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf and arrays.
I have a snippet of code that looks something like:
if (is_array($p_sub_values)) {
foreach ($p_sub_values as $i = $v) {
$p_sub_values_str[$i] = '$v';
}
$s = join(',', $p_sub_values_str);
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
}
$tmp[0] in this case contains a string like 'Fred likes %1$s on his %2$s',
taking advantage of positional substitution with sprintf.
The function call to this snippet can have an optional array passed. My
need/desire is to substitute each element of the array into the appropriate
position with sprintf. So far I've tried:
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
$r = htmlentities(sprintf($tmp[0], ${$s}, ENT_QUOTES);
and a few other bits and pieces, all to no avail (error is about not enough
arguments).
Is there any way to accomplish this in PHP, or do I need to roll my own
substitution code? The array can obviously be anything from a single value
to 'unlimited' (though in practice will probably be less than 5).
--
My mind not only wanders, it sometimes leaves completely.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf and arrays.
For one, you are missing a right parenthesis ) in all of your examples.
htmlentities( sprintf( $tmp[0], $s, ENT_QUOTES )
Second, the string you are trying to format only has one variable
argument: $s.
Fred likes %1$s on his %2$s
You have it numbered for ordering, but you are still ordering one
variable. I never used sprintf like that, so I'm not sure if that is a
valid way of doing it. That may be what is giving you the too few
arguments error. Typically you would do something like:
Fred likes %1$s on his %2$t
If you are using sprintf in a valid manner, then the problem is
probably in the $s argument of the sprintf function. You are only
specifying one variable to replace when you are looking to do two
replacements. The contents of $s is a single string that happens to
contains commas, it does not get evaluated as multiple arguments just
because it contains commas. Try wrapping $s in eval().
htmlentities( sprintf( $tmp[0], eval($s) ), ENT_QUOTES);
Personally, I rolled my own basic search and replace string function to
support my own templating tag system. I still use sprinf for more
fancy stuff, but for basic stuff, I rolled my own. A simplified
version is below. It accepts an associative array and a string as
parameters and returns the merged result.
$text_str = And example for {::Name::} in answer to {::Question::} on
the {::ListName::}. Hope it helps {::Name::}!;
$data_Merge['Name'] = Duncan Hill;
$data_Merge['Question'] = sprintf and arrays;
$data_Merge['ListName'] = PHP General;
echo mergeTplData($data_Merge, $text_str);
function mergeTplData($data, $str) {
$searchTags = array_keys($data);
$searchTags = '{::'.implode('::},{::',$searchTags).'::}';
$searchTags = explode(',',$searchTags);
$str = str_replace($searchTags,$data,$str);
return $str;
}
On Apr 6, 2005, at 7:23 AM, Duncan Hill wrote:
I have a snippet of code that looks something like:
if (is_array($p_sub_values)) {
foreach ($p_sub_values as $i = $v) {
$p_sub_values_str[$i] = '$v';
}
$s = join(',', $p_sub_values_str);
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
}
$tmp[0] in this case contains a string like 'Fred likes %1$s on his
%2$s',
taking advantage of positional substitution with sprintf.
The function call to this snippet can have an optional array passed.
My
need/desire is to substitute each element of the array into the
appropriate
position with sprintf. So far I've tried:
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
$r = htmlentities(sprintf($tmp[0], ${$s}, ENT_QUOTES);
and a few other bits and pieces, all to no avail (error is about not
enough
arguments).
Is there any way to accomplish this in PHP, or do I need to roll my own
substitution code? The array can obviously be anything from a single
value
to 'unlimited' (though in practice will probably be less than 5).
--
My mind not only wanders, it sometimes leaves completely.
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
Brent Baisley
Systems Architect
Landover Associates, Inc.
Search Advisory Services for Advanced Technology Environments
p: 212.759.6400/800.759.0577
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf and arrays.
On Wednesday 06 April 2005 16:40, Brent Baisley wrote: For one, you are missing a right parenthesis ) in all of your examples. htmlentities( sprintf( $tmp[0], $s, ENT_QUOTES ) Meh, syntax blip from the cut and paste. Second, the string you are trying to format only has one variable argument: $s. Fred likes %1$s on his %2$s The source array in this case has two entries. My whole aim is to pass an array of n entries, unroll the array into a string and somehow interpolate the string into the sprintf call so that life is groovy. I realise $s looks like a single variable to PHP at that point sprintf() is called, and this is what I'm trying to work around - some way to get sprintf to realise that $s is actually two strings. Ie, I need a double level of interpolation on the $s value so that sprintf($tmp[0], $s) turns into sprintf(tmp[0], $array[0], $array[1]). I'm starting to get the feeling that this will be impossible. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf and arrays.
Making life groovy has been difficult since the 60's. You want to have sprintf look at the contents of the variable instead of the variable itself. Anytime you want to do something like this you use the eval() function to evaluate the contents of the variable. On Apr 6, 2005, at 12:46 PM, Duncan Hill wrote: On Wednesday 06 April 2005 16:40, Brent Baisley wrote: For one, you are missing a right parenthesis ) in all of your examples. htmlentities( sprintf( $tmp[0], $s, ENT_QUOTES ) Meh, syntax blip from the cut and paste. Second, the string you are trying to format only has one variable argument: $s. Fred likes %1$s on his %2$s The source array in this case has two entries. My whole aim is to pass an array of n entries, unroll the array into a string and somehow interpolate the string into the sprintf call so that life is groovy. I realise $s looks like a single variable to PHP at that point sprintf() is called, and this is what I'm trying to work around - some way to get sprintf to realise that $s is actually two strings. Ie, I need a double level of interpolation on the $s value so that sprintf($tmp[0], $s) turns into sprintf(tmp[0], $array[0], $array[1]). I'm starting to get the feeling that this will be impossible. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Brent Baisley Systems Architect Landover Associates, Inc. Search Advisory Services for Advanced Technology Environments p: 212.759.6400/800.759.0577 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf and arrays.
On Wed, April 6, 2005 4:23 am, Duncan Hill said:
I have a snippet of code that looks something like:
if (is_array($p_sub_values)) {
foreach ($p_sub_values as $i = $v) {
$p_sub_values_str[$i] = '$v';
}
$s = join(',', $p_sub_values_str);
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
}
$tmp[0] in this case contains a string like 'Fred likes %1$s on his %2$s',
taking advantage of positional substitution with sprintf.
The function call to this snippet can have an optional array passed. My
need/desire is to substitute each element of the array into the
appropriate
position with sprintf. So far I've tried:
$r = htmlentities(sprintf($tmp[0], $s, ENT_QUOTES);
$r = htmlentities(sprintf($tmp[0], ${$s}, ENT_QUOTES);
As far as I know, there's no super easy way to do what you want for an
arbitrary number of arguments...
While PHP does have support for functions to take an arbitrary number of
arguments, there's no way to pass those on down to something else, like $@
in shell (and Perl?). Least not as far as I know.
and a few other bits and pieces, all to no avail (error is about not
enough
arguments).
Is there any way to accomplish this in PHP, or do I need to roll my own
substitution code? The array can obviously be anything from a single
value
to 'unlimited' (though in practice will probably be less than 5).
You could, of course, do something like:
list($a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$a10) = $tmp;
sprintf($a1, $a2, $a3, $a4, $a5, $a6, $a7, $a8, $a9, $a10);
Depending on your error reporting, you'll get messages, so you'll need to
use @ to suppress them.
I guess you could use count() and do string manipulation to build the
sprintf(...) you want and then use eval() and you could then avoid the
warnings...
Aha!
Wait a minute.
I *THINK* this will do what you want:
call_user_func_array('sprintf', $tmp);
Only I'm not sure you can use a built-in function for it...
http://php.net/call_user_func_array
Never used it, so not really sure it fits the bill.
--
Like Music?
http://l-i-e.com/artists.htm
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Sprintf?
I need to go from 1754210747 (decimal) to 17 54 21 a7 47 (hex per character) Basically, reformat the string for each character, converting it to Hex, and spacing after each two characters. Sprintf? ...Rene -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf troubles
Hey, Im trying to use sprintf to format a number and left pad it with spaces, but it doesnt want to add the spaces I can pad it with anyother char using sprintf(%'_8.2f, $val) which will left-pad the number with underscores Has anyone had any luck padding with spaces?? or is there a better way to do this?? Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf troubles
Hi, Saturday, March 27, 2004, 1:31:33 AM, you wrote: CT Hey, CT Im trying to use sprintf to format a number and left pad it with spaces, but CT it doesnt want to add the spaces CT I can pad it with anyother char using sprintf(%'_8.2f, $val) which will CT left-pad the number with underscores CT Has anyone had any luck padding with spaces?? CT or is there a better way to do this?? CT Chris If you are looking at it on a web page the spaces will be ignored unless you stick it in a pre/pre block or convert the spaces to nbs; -- regards, Tom -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf
hey I'm trying to make dynamic database queries using sprintf any way I can get around this error? $sql = SELECT * FROM Vacation where StartDate LIKE '%s/ . '\%' . /%s'; $sql = sprintf($sql, $_GET[month], $_GET[year] ); I want just a literal slash between the month and year, printf seems to complain of to few arguments I've tried escaping the meaning of the % in the example above and still get errors Thanks TYler -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sprintf
$sql = SELECT * FROM Vacation where StartDate LIKE '%s\\%s'; That should work :) Cheers, Rob. Tyler BIRD wrote: hey I'm trying to make dynamic database queries using sprintf any way I can get around this error? $sql = SELECT * FROM Vacation where StartDate LIKE '%s/ . '\%' . /%s'; $sql = sprintf($sql, $_GET[month], $_GET[year] ); I want just a literal slash between the month and year, printf seems to complain of to few arguments I've tried escaping the meaning of the % in the example above and still get errors Thanks TYler -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:robert.cummings;webmotion.com | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf() question
I read the manual page on sprintf, but I still don't understand exactly how the format string works. $money1 = 68.75; $money2 = 54.35; $money = $money1 + $money2; // echo $money will output 123.1; $formatted = sprintf(%01.2f, $money); // echo $formatted will output 123.10 How does that work? What part of the string corresponds to what? Thanks for any and all help!
Re: [PHP] sprintf() question
Experiment a bit and I'm sure you'll find it easy. One example, change this
portion
$formatted = sprintf("%01.2f", $money);
to
$formatted = sprintf("%01.3f", $money);
then see how it works...
?php
$money1 = 68.75;
$money2 = 54.35;
$money = $money1 + $money2;
echo "This is money: $money";
$formatted = sprintf("%01.3f", $money);
echo "This is formatted: $formatted";
?
HTH,
- E
I read the manual page on sprintf, but I still don't understand exactly
how the format string works.
$money1 = 68.75;
$money2 = 54.35;
$money = $money1 + $money2;
// echo $money will output "123.1";
$formatted = sprintf("%01.2f", $money);
// echo $formatted will output "123.10"
How does that work? What part of the string corresponds to what? Thanks
for any and all help!
_
$B%-%c%j%"%"%C%W$rL\;X$9$"$J$?$N%J%S%2!<%?!<(B MSN $B="?&!>?&(B
http://career.msn.co.jp/
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf precision modifiers
The manual for sprintf http://www.php.net/manual/en/function.sprintf.php gives a nice introduction to the idea of the different formatting options. But, the reader is referred to the examples to see the different ways that you can format a number. Is there a better resource than this for formatting codes in sprintf ? I think that the annotations are great, but you shouldn't have to rely on these afterthoughts for your information (I didn't see how I could limit the trailing zeroes until I got to the annotations). Something tells me that for C programmers, formatting output like this is old hat, but for those of us who are just getting our feet wet in programming, there should be a more exhaustive reference as to what can be done... is there any such reference? Thanks, Erik Erik Price Web Developer Temp Media Lab, H.H. Brown [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] sprintf()'s in if()'s
I suppose when you have so few problems you get to nitpick..
Guess my question is; why doesn't this work?
if(sprintf(%01.2f,$Result[CurrentPrice]+$Result[Increment]) =
sprintf(%01.2f,$BidAmt)) {
when this works;
if(0.30 = 1.00) {
I'll just settle with a workaround for now.
Thanks,
Chris
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] sprintf()'s in if()'s
I suppose when you have so few problems you get to nitpick..
Guess my question is; why doesn't this work?
if(sprintf(%01.2f,$Result[CurrentPrice]+$Result[Increment]) =
sprintf(%01.2f,$BidAmt)) {
when this works;
if(0.30 = 1.00) {
I'll just settle with a workaround for now.
Thanks,
Chris
The former is being treated as a string, the latter is a double/float
You probably don't need to format them when making the comparison. Just try:
if ( ($Result[CurrentPrice]+$Result[Increment]) = $BidAmt) {
jason
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]
