harleydude Posted October 17, 2006 Share Posted October 17, 2006 I am using JPGraph to create some basic line graphs. According to the spec's i have, there can be anywhere from 1 line to 10 lines on a graph at a time depending on the SQL criteria being passed.Now, in JPGraph, you define a line like this (truncated for simplicity):[code]// Create the first line$p1 = new LinePlot($datay1);$p1->SetColor("navy");$graph->Add($p1);[/code]Note that the line is a standard variable name ($p1). To add another line you just rinse and repeat this code. NOW, since the number of lines is arbitrary, is there a way to pass a variable variable to the JPGraph and replace the $p1 with a more usable scoped variable?I was looking for something like:[code]for($i=0;$i<sizeof($chartarray);$i++){ $p=$("p".$i); $$p = new LinePlot($chartarray[$i]); // get list stored in $i position $$p->SetColor("navy"); $graph->Add($$p);}[/code]I just read some on variable variables but am not sure of how they work and this bit odf code is off the top of my head and is not tested. I will play with this some but need to know if the concept works and best way to impliment it.Thanks in advance,HD Link to comment https://forums.phpfreaks.com/topic/24204-variable-handlingmanagement/ Share on other sites More sharing options...
craygo Posted October 17, 2006 Share Posted October 17, 2006 Try this[code]$p=$("p".$i);[/code]to this[code]$p = "p".$i;[/code]Ray Link to comment https://forums.phpfreaks.com/topic/24204-variable-handlingmanagement/#findComment-110018 Share on other sites More sharing options...
harleydude Posted October 17, 2006 Author Share Posted October 17, 2006 That helps but the chart is blank...I have an array ($dt) with the following data:[code]** > y dataArray( [0] => Array ( [0] => 1.00 [1] => 1.00 [2] => 1.00 [3] => 1.00 [4] => 1.00 ) [1] => Array ( [0] => 0 [1] => 0 [2] => 0 [3] => 1.50 [4] => 1.50 ) [2] => Array ( [0] => 0 [1] => 2.47 [2] => 2.50 [3] => 2.51 [4] => 2.51 )[/code]Here is what I have for each line of the graph:[code]$graph = new Graph(350,250,"auto"); $graph->SetScale("textlin");for($i=0;$i<sizeof($dt);$i++){ $p="p".$i; $$p = new LinePlot($dt[$i]); // get list stored in $i position $graph->Add($$p);} [/code]image outputs empty indicating that jpgraph does not like the data.I have also tried this by setting $i=0 and commenting out the for loop with no success either. JPGraph does not like the $p="p".$i; varaible name.Can anyone offer help or ideas on how to fix the above code snippet? Link to comment https://forums.phpfreaks.com/topic/24204-variable-handlingmanagement/#findComment-110060 Share on other sites More sharing options...
harleydude Posted October 17, 2006 Author Share Posted October 17, 2006 Nevermind, I got it... the technique implied earlier works fine, there was an error in the code (DOH!!)Thanks for the help!! Link to comment https://forums.phpfreaks.com/topic/24204-variable-handlingmanagement/#findComment-110069 Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.