for loop

[sandy1028]

$value=array(23,56,23,46,3,0,56,34);
for($i=0;$i<count($value);$i++){
if($value[$i] == '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);
}
elseif($value[$i] < '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("red");
$lineplot->mark->SetWidth(2);
}

 

 

Please anyone tell me what is the problem with the code.

 

I should mark only the value '0' as black color in Jpgraphs

 

But the whole array is taking black color.

How to loop an array to take only value 0 as black circle

 

[sKunKbad]

try foreach:

 

$value=array(23,56,23,46,3,0,56,34);
foreach ($value as $x){
if($x == '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);
}elseif($x < '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("red");
$lineplot->mark->SetWidth(2);
}
}

um, i don't know if that is what you are after

[Wuhtzu]

I think you just set the color ect. one time and thats why everything is black. Each time you go through your loop you assign values to $lineplot.... Aren't you overwriting your $lineplot all the time?

 

 

[sandy1028]

In the array value[], the values onlu which are zero I should mark as balck.

 

But now all the values are taking as balck.

I am not undersatnding why it is taking as balck.

 

If I use foreach($value as $val) also it takes black for all the values

[sandy1028]

hi,

 

The black is taken even for the value greater than zero as in the attached figure

 

How can the problem be solved

 

 

[attachment deleted by admin]

[Wuhtzu]

The only problem with your code is the way you assign colors to your values ($lineplot->mark->) because your loop functions properly detecting values of 0 and <0 perfectly. This this (which is your code with an echo statement added):

 

<?php
$value=array(23,56,23,46,3,0,56,34,-3,-13);

for($i=0;$i<count($value);$i++){

if($value[$i] == '0'){

	//Echo the value
	echo $value[$i] . " black<br>";
}
elseif($value[$i] < '0'){

	//Echo the value
	echo $value[$i] . " red<br>";
}
}
?>

 

This outputs values and colors as expected. So tell us more about how you assign the colors.

[sandy1028]

But when I plot the graph the color is getting plotted for all the values in the array.

 

Do you have any idea why it is plotting black circle.

I have attached the image

 

[attachment deleted by admin]

[Wuhtzu]

Post some more code because right now it seems like you only assign the color black once and then  use it throughout the creation of your circles:

 

$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);

 

 

 

 

[sandy1028]

<?php
include ("/var/www/jpgraph-1.19/jpgraph.php");
include ("/var/www/jpgraph-1.19/jpgraph_line.php");

$value=array(23,56,34,23,54,0,23,-34,24);
$max=max($value);


$graph = new Graph(720,200,"auto");
$graph->SetScale("textlin",0,$max);
$graph->img->SetMargin(40,40,40,40);
$lineplot = new LinePlot($value);
$lineplot->SetColor("red");

foreach($value as $val){
if($val == '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);
}
elseif($val < '0'){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("red");
$lineplot->mark->SetWidth(2);
}
}
$graph->Add($lineplot);
?>

[Wuhtzu]

Does $lineplot hold an array with plots? (Value, Type, Color ect.)

 

If it does try to output / print that array using print_r() and tell us about the result. This should show what is going on....

[sandy1028]

include ("/var/www/jpgraph-1.19/jpgraph.php");
include ("/var/www/jpgraph-1.19/jpgraph_line.php");

$value=array();
$value=array(23,34,6,23,56,34,0,3,34,56,3);
$max=max($value);


$graph = new Graph(720,200,"auto");
$graph->SetScale("textlin",0,$max);
$graph->img->SetMargin(40,40,40,40);
$lineplot = new LinePlot($value);
$lineplot->SetColor("red");
$graph->xaxis-> title->Set("Time(hr)--------->" );
$graph->yaxis-> title->Set("%---------------->" );

$graph->title->SetFont(FF_FONT1,FS_BOLD);

$graph->SetMarginColor("red");
$graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD);
$graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);
//$graph->yaxis->SetLayout();
//$graph->yaxis->Pos(.4,.9,"right","right");
//$graph->legend->Pos(.01,.8,"right","center");
$lineplot->SetLegend("Value Up");
$graph->legend->SetLayout(LEGEND_HOR);
$graph->legend->Pos(.5,.9,"center","right");
$graph->legend->SetFillColor("lemonchiffon2:1.3");
// To set the y axos color and font color*****************/
$graph->yaxis->SetColor("red","black");
$graph->xaxis->SetColor("red","black");

$lineplot->SetWeight(1);
$graph->yaxis->SetFont(FF_FONT1,FS_BOLD);
$graph->yaxis->SetTitleMargin(30);
$graph->xaxis->SetTitleMargin(45);
$graph->SetBackgroundGradient('lemonchiffon','white',GRAD_MIDHOR,BGRAD_PLOT);
$graph->SetMarginColor('lemonchiffon2:1.3');
$lineplot->SetFillColor("chocolate1");

$graph->xaxis->scale->ticks->SetColor('black','black');

$graph->SetBox(true,'red',1);


$graph->SetShadow();
$graph->ygrid->SetColor('orange');

/**************** To add the filled circle if the value is 0 i.e if it is down*/

foreach($value as $val){
if($val == 0){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);
}
elseif($val < 0){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("red");
$lineplot->mark->SetWidth(2);
}
}

$graph->yaxis->SetTickSide(SIDE_LEFT);
$graph->xaxis->SetTickSide(SIDE_DOWN);

//$graph->xgrid->SetFill();
$graph->xgrid->Show();
$graph->Add($lineplot);
//$graph->Add($lineplot2);
$graph->Stroke();
?>

 

The balck circle is marked for all the values.

But I am not understanding why it is not just plotting for the value which is 0

 

The output is attached figure

 

[attachment deleted by admin]