Re: [PHP-DB] how to reverse a hudge multidimensional array?
This seems quite familiar for me. Does this has to do whit chaos? Anyway, i think i'm getting the idea, but it would be a better to see the whole code. (at least for me) good luck, andrés thx again for helping me In fact i think the solution you gave me isn t not much faster as the while loop i use for the moment... and the execution speed is my only problem... well in fact i think i haven t be very clear with the goal i need to get. let me detail this to you frm the beginning to the end... -- PHP Database 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-DB] how to reverse a hudge multidimensional array?
[5] : 5 (max length with a 1 million row table about 25 indexes, so this array should be quite small) =...alternatively, change the SQL (above) to SELECT...INTO a temporary table. Then perform another SELECT...COUNT()...GROUP on that resultset to get a result that lists the number of occurences, and the number of naffair values/couples that occur with that frequency. This is a situation where sub-SELECTs would be a valuable feature! Just to go to the very end of my need, even if its not useful: then i divide the values by their index (i gonna tell you what for) so the final result is : $suite[1] : 2 /1 2 $suite[2] : 6 /2 3 $suite[3] : 3 /3 1 $suite[4] : unset / $suite[5] : 5 /5 1 (as the previous array was small this one is too ;o)) =I think I got lost in this last step... Well you know everything : now it will be easier for me to tell you what i want to calculate : THE NUMBER OF COUPLES of naffaire/ncpte that have an occurence of 1, that have an occurrence of 2, of 3, of 4 =continuing on with the second SQL, to achieve this, use ORDER BY to sort the results. so thereare only 2 long processes : the while loop (it won t be much shorter if i use a for loop) and the array_count_values (this one is a single instruction so i trust php developpers for the optimization of their code ;o) ) =whereas for processing large volumes of data, I would prefer to rely upon the RDBMS - and remember, a temporary table should be constructed entirely in RAM (just like a PHP array) so there's no disk-speed/time penalty to be paid! You will have understand my prob now : the very very big loss of time in my algorythm is the while loop... That s why i would like to do the same whithout using any kind of loop before the array_count_values, before this instruction, the array is far too big. I would win a lot of execution time help please i m sure there must be a solution but i m lost... =is the db on an Internet-accessible server that I could reach? =Whats the number of distinct naffaire values? How many different frequencies result? ie How many records/array elements do you have returned at each step? Hope i managed to be clear. =see comment above. =Regards, =dn Thanx for your help Etienne - Original Message - From: DL Neil [EMAIL PROTECTED] To: Etienne DURAND [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 11:47 PM Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array? Bon soir Etienne, Like I say, Inverting an array is a chore, it's far easier to invert the pointers... but if you must do it:- For loop to control the first dimension using $i For loop to control the second dimension using $j $temp = $array[ $i ][ $j ]; $array[ $i ][ $j ] = $array[ $j ][ $i ]; $array[ $j ][ $i ] = $temp; Ok? =dn thx a lot for your answer, in fact i only have to return one of the 15 datas, so it makes one column... anyway, i already coded a solution with a while. My question was just to know if it was possible to do it without repeating 100 times the same processing. In fact i begin to believe that it is not possible to reverse the 2 dimensions of an array... If you have a solution for me i m interested, even if it takes a lot of processor ressources because i will have a dedicated server and there wont be more than 30 users, not at the same time (that s for a stat intranet)... just to correct my unprecision again, there will be 1M datas to process not 15 because the array i ve to process is the result of my mysql query and that this query will only return a single column of datas (count(*) ) Helll :) Etienne - Original Message - From: DL Neil [EMAIL PROTECTED] To: Etienne Durand [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 10:44 AM Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array? Etienne, Well i hope someone will be able to give me a solution... Here s my problem: I'm working with a hudge mysql table (about 15 columns and 100 rows...) in fact i ve got to count the number of couples `ncompte`/`naffaire` in the table and finaly calculate the number of couples that appear once, twice here is the query i do: $result = mysql_query(SELECT count(*) FROM datas GROUP BY `ncompte`, `naffaire`); its result like something like this: count(*) naffaire ncompte 4 affaire1 compte1 4 affaire2 compte2 1 affaire3 compte3 2 affaire4 compte4 1 affaire5 compte5 (plus many more) my final result should
Re: [PHP-DB] how to reverse a hudge multidimensional array?
Etienne,
Well i hope someone will be able to give me a solution...
Here s my problem:
I'm working with a hudge mysql table (about 15 columns and 100 rows...)
in fact i ve got to count the number of couples `ncompte`/`naffaire` in the
table and finaly calculate the number of couples that appear once, twice
here is the query i do:
$result = mysql_query(SELECT count(*) FROM datas GROUP BY `ncompte`,
`naffaire`);
its result like something like this:
count(*) naffaire ncompte
4 affaire1 compte1
4 affaire2 compte2
1 affaire3 compte3
2 affaire4 compte4
1 affaire5 compte5
(plus many more)
my final result should be:
$result[1] :2
$result[2] :1
$result[4] :2
I manage to do this quite easily but i use a while instruction...
while($row = mysql_fetch_array($result)) {
array_push($suite, $row[count(*)]);
}
As my table is very long the while takes a lot of time to complete...
So my question is : Is there a solution to return my array as follow :
1 2 3 1 4 7
4 5 6 ===2 5 8 ???
7 8 9 3 6 9
It would allow me to not have to use this long long while
So if someone could telle me how to modify my query or what instructions to
use to do that...
=there are various functions in PHP to 'reverse' arrays, but I must confess that I
have never used them.
Regardless, if there is one to suit your purpose, it will surely consume CPU time to
achieve the swap-over of
15M items.
=your example my final result should be: talks of enumerated arrays, so I shall
assume this is the way you
always use them.
=you want to somehow achieve:
array[1][1] = array [1][1];
array[1][2] = array [2][1];
array[1][3] = array [3][1];
etc
(you know that you can't do the above, right!?)
=thereafter the array would be processed by using a mechanism such as two nested FOR
loops to iterate through
the row/column elements of the array, eg
for ( i=1; i15; i++ );
for ( j=1; j100; j++ );
process( array[i][j] );
etc
=can you leave the array where it is, and adjust the way the iterations are managed?
Instead of proceeding
methodically by counting 'up', count 'down', eg
for ( i=15; i0; i-- );
for ( j=100; j0; j-- );
process( array[i][j] );
etc
=Regards,
=dn
--
PHP Database 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-DB] how to reverse a hudge multidimensional array?
thx a lot for your answer,
in fact i only have to return one of the 15 datas, so it makes one column...
anyway, i already coded a solution with a while. My question was just to
know if it was possible to do it without repeating 100 times the same
processing.
In fact i begin to believe that it is not possible to reverse the 2
dimensions of an array...
If you have a solution for me i m interested, even if it takes a lot of
processor ressources because i will have a dedicated server and there wont
be more than 30 users, not at the same time (that s for a stat intranet)...
just to correct my unprecision again, there will be 1M datas to process not
15 because the array i ve to process is the result of my mysql query and
that this query will only return a single column of datas (count(*) )
Helll :)
Etienne
- Original Message -
From: DL Neil [EMAIL PROTECTED]
To: Etienne Durand [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 10:44 AM
Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array?
Etienne,
Well i hope someone will be able to give me a solution...
Here s my problem:
I'm working with a hudge mysql table (about 15 columns and 100
rows...)
in fact i ve got to count the number of couples `ncompte`/`naffaire` in
the
table and finaly calculate the number of couples that appear once,
twice
here is the query i do:
$result = mysql_query(SELECT count(*) FROM datas GROUP BY `ncompte`,
`naffaire`);
its result like something like this:
count(*) naffaire ncompte
4 affaire1 compte1
4 affaire2 compte2
1 affaire3 compte3
2 affaire4 compte4
1 affaire5 compte5
(plus many more)
my final result should be:
$result[1] :2
$result[2] :1
$result[4] :2
I manage to do this quite easily but i use a while instruction...
while($row = mysql_fetch_array($result)) {
array_push($suite, $row[count(*)]);
}
As my table is very long the while takes a lot of time to complete...
So my question is : Is there a solution to return my array as follow :
1 2 3 1 4 7
4 5 6 ===2 5 8 ???
7 8 9 3 6 9
It would allow me to not have to use this long long while
So if someone could telle me how to modify my query or what instructions
to
use to do that...
=there are various functions in PHP to 'reverse' arrays, but I must
confess that I have never used them.
Regardless, if there is one to suit your purpose, it will surely consume
CPU time to achieve the swap-over of
15M items.
=your example my final result should be: talks of enumerated arrays, so
I shall assume this is the way you
always use them.
=you want to somehow achieve:
array[1][1] = array [1][1];
array[1][2] = array [2][1];
array[1][3] = array [3][1];
etc
(you know that you can't do the above, right!?)
=thereafter the array would be processed by using a mechanism such as two
nested FOR loops to iterate through
the row/column elements of the array, eg
for ( i=1; i15; i++ );
for ( j=1; j100; j++ );
process( array[i][j] );
etc
=can you leave the array where it is, and adjust the way the iterations
are managed? Instead of proceeding
methodically by counting 'up', count 'down', eg
for ( i=15; i0; i-- );
for ( j=100; j0; j-- );
process( array[i][j] );
etc
=Regards,
=dn
--
PHP Database 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-DB] how to reverse a hudge multidimensional array?
Bon soir Etienne,
Like I say, Inverting an array is a chore, it's far easier to invert the pointers...
but if you must do it:-
For loop to control the first dimension using $i
For loop to control the second dimension using $j
$temp = $array[ $i ][ $j ];
$array[ $i ][ $j ] = $array[ $j ][ $i ];
$array[ $j ][ $i ] = $temp;
Ok?
=dn
thx a lot for your answer,
in fact i only have to return one of the 15 datas, so it makes one column...
anyway, i already coded a solution with a while. My question was just to
know if it was possible to do it without repeating 100 times the same
processing.
In fact i begin to believe that it is not possible to reverse the 2
dimensions of an array...
If you have a solution for me i m interested, even if it takes a lot of
processor ressources because i will have a dedicated server and there wont
be more than 30 users, not at the same time (that s for a stat intranet)...
just to correct my unprecision again, there will be 1M datas to process not
15 because the array i ve to process is the result of my mysql query and
that this query will only return a single column of datas (count(*) )
Helll :)
Etienne
- Original Message -
From: DL Neil [EMAIL PROTECTED]
To: Etienne Durand [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 10:44 AM
Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array?
Etienne,
Well i hope someone will be able to give me a solution...
Here s my problem:
I'm working with a hudge mysql table (about 15 columns and 100
rows...)
in fact i ve got to count the number of couples `ncompte`/`naffaire` in
the
table and finaly calculate the number of couples that appear once,
twice
here is the query i do:
$result = mysql_query(SELECT count(*) FROM datas GROUP BY `ncompte`,
`naffaire`);
its result like something like this:
count(*) naffaire ncompte
4 affaire1 compte1
4 affaire2 compte2
1 affaire3 compte3
2 affaire4 compte4
1 affaire5 compte5
(plus many more)
my final result should be:
$result[1] :2
$result[2] :1
$result[4] :2
I manage to do this quite easily but i use a while instruction...
while($row = mysql_fetch_array($result)) {
array_push($suite, $row[count(*)]);
}
As my table is very long the while takes a lot of time to complete...
So my question is : Is there a solution to return my array as follow :
1 2 3 1 4 7
4 5 6 ===2 5 8 ???
7 8 9 3 6 9
It would allow me to not have to use this long long while
So if someone could telle me how to modify my query or what instructions
to
use to do that...
=there are various functions in PHP to 'reverse' arrays, but I must
confess that I have never used them.
Regardless, if there is one to suit your purpose, it will surely consume
CPU time to achieve the swap-over of
15M items.
=your example my final result should be: talks of enumerated arrays, so
I shall assume this is the way you
always use them.
=you want to somehow achieve:
array[1][1] = array [1][1];
array[1][2] = array [2][1];
array[1][3] = array [3][1];
etc
(you know that you can't do the above, right!?)
=thereafter the array would be processed by using a mechanism such as two
nested FOR loops to iterate through
the row/column elements of the array, eg
for ( i=1; i15; i++ );
for ( j=1; j100; j++ );
process( array[i][j] );
etc
=can you leave the array where it is, and adjust the way the iterations
are managed? Instead of proceeding
methodically by counting 'up', count 'down', eg
for ( i=15; i0; i-- );
for ( j=100; j0; j-- );
process( array[i][j] );
etc
=Regards,
=dn
--
PHP Database 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]
--
PHP Database 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-DB] how to reverse a hudge multidimensional array?
is far too
big.
I would win a lot of execution time help please i m sure there must be a
solution but i m lost...
Hope i managed to be clear.
Thanx for your help
Etienne
- Original Message -
From: DL Neil [EMAIL PROTECTED]
To: Etienne DURAND [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 11:47 PM
Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array?
Bon soir Etienne,
Like I say, Inverting an array is a chore, it's far easier to invert the
pointers...
but if you must do it:-
For loop to control the first dimension using $i
For loop to control the second dimension using $j
$temp = $array[ $i ][ $j ];
$array[ $i ][ $j ] = $array[ $j ][ $i ];
$array[ $j ][ $i ] = $temp;
Ok?
=dn
thx a lot for your answer,
in fact i only have to return one of the 15 datas, so it makes one
column...
anyway, i already coded a solution with a while. My question was just to
know if it was possible to do it without repeating 100 times the
same
processing.
In fact i begin to believe that it is not possible to reverse the 2
dimensions of an array...
If you have a solution for me i m interested, even if it takes a lot of
processor ressources because i will have a dedicated server and there
wont
be more than 30 users, not at the same time (that s for a stat
intranet)...
just to correct my unprecision again, there will be 1M datas to process
not
15 because the array i ve to process is the result of my mysql query and
that this query will only return a single column of datas (count(*) )
Helll :)
Etienne
- Original Message -
From: DL Neil [EMAIL PROTECTED]
To: Etienne Durand [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 10:44 AM
Subject: Re: [PHP-DB] how to reverse a hudge multidimensional array?
Etienne,
Well i hope someone will be able to give me a solution...
Here s my problem:
I'm working with a hudge mysql table (about 15 columns and 100
rows...)
in fact i ve got to count the number of couples
`ncompte`/`naffaire` in
the
table and finaly calculate the number of couples that appear once,
twice
here is the query i do:
$result = mysql_query(SELECT count(*) FROM datas GROUP BY
`ncompte`,
`naffaire`);
its result like something like this:
count(*) naffaire ncompte
4 affaire1 compte1
4 affaire2 compte2
1 affaire3 compte3
2 affaire4 compte4
1 affaire5 compte5
(plus many more)
my final result should be:
$result[1] :2
$result[2] :1
$result[4] :2
I manage to do this quite easily but i use a while instruction...
while($row = mysql_fetch_array($result)) {
array_push($suite, $row[count(*)]);
}
As my table is very long the while takes a lot of time to
complete...
So my question is : Is there a solution to return my array as follow
:
1 2 3 1 4 7
4 5 6 ===2 5 8 ???
7 8 9 3 6 9
It would allow me to not have to use this long long while
So if someone could telle me how to modify my query or what
instructions
to
use to do that...
=there are various functions in PHP to 'reverse' arrays, but I must
confess that I have never used them.
Regardless, if there is one to suit your purpose, it will surely
consume
CPU time to achieve the swap-over of
15M items.
=your example my final result should be: talks of enumerated arrays,
so
I shall assume this is the way you
always use them.
=you want to somehow achieve:
array[1][1] = array [1][1];
array[1][2] = array [2][1];
array[1][3] = array [3][1];
etc
(you know that you can't do the above, right!?)
=thereafter the array would be processed by using a mechanism such as
two
nested FOR loops to iterate through
the row/column elements of the array, eg
for ( i=1; i15; i++ );
for ( j=1; j100; j++ );
process( array[i][j] );
etc
=can you leave the array where it is, and adjust the way the
iterations
are managed? Instead of proceeding
methodically by counting 'up', count 'down', eg
for ( i=15; i0; i-- );
for ( j=100; j0; j-- );
process( array[i][j] );
etc
=Regards,
=dn
--
PHP Database 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]
--
PHP Database 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]
[PHP-DB] how to reverse a hudge multidimensional array?
Well i hope someone will be able to give me a solution...
Here s my problem:
I'm working with a hudge mysql table (about 15 columns and 100 rows...)
in fact i ve got to count the number of couples `ncompte`/`naffaire` in the
table and finaly calculate the number of couples that appear once, twice
here is the query i do:
$result = mysql_query(SELECT count(*) FROM datas GROUP BY `ncompte`,
`naffaire`);
its result like something like this:
count(*) naffaire ncompte
4 affaire1 compte1
4 affaire2 compte2
1 affaire3 compte3
2 affaire4 compte4
1 affaire5 compte5
(plus many more)
my final result should be:
$result[1] :2
$result[2] :1
$result[4] :2
I manage to do this quite easily but i use a while instruction...
while($row = mysql_fetch_array($result)) {
array_push($suite, $row[count(*)]);
}
As my table is very long the while takes a lot of time to complete...
So my question is : Is there a solution to return my array as follow :
1 2 3 1 4 7
4 5 6 ===2 5 8 ???
7 8 9 3 6 9
It would allow me to not have to use this long long while
So if someone could telle me how to modify my query or what instructions to
use to do that...
thx
Etienne
--
PHP Database 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]
