for loop

[sandy1028]

hi,

I am new to this forum

I have doubt in this code

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);
}
 }

Here only if the value is 0 the mark shoul be set to black.

But I am facing problem if one of the value is 0 all the fields are set to black circle.
But I need the black circle if the value is 0.

I have attached the image

[dougal85]

You are doing a comparison with the number in quotes. This means its a string.

so thats a bit like me saying $val < 'a' or something, your not doing a mathematical comparison.

How are the numbers store in your $value array?

Try removing the single quotes

[sandy1028]

hi,

Thanks for the reply...
I am facing problem if one of the value is zero all are set to black filled circle.

I just want only value which is zero to be black filled circle.

The problem is in
$lineplot->mark->

here $lineplot = new LinePlot($value);

$lineplot is the array of values.

[bpat1434]

I think your comparison sign is facing the wrong direction. On your graph, you only show positive numbers; however, your comparison asks if $val is less-than 0. Your comparison should be:

    elseif($val > 0)

[sandy1028]

is there any way to select and mark the filledcircle from the array

Suppose the filledcircle should be only at the first location
How do I mark the filledcircle

[toxic_brain]

this seems more optimized,

foreach($value as $val){
$color = $val == 0 ? 'black' : 'red' ;
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor($color);
$lineplot->mark->SetWidth(2);
 }

ur code is just to set the values. Where is outputing function calls? PLs post them so let's hav a look on dem,.

[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 black circle is marked for all the values in the array if the value is 0.

I just want the black filled circle if only the value is 0 and not 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

[bpat1434]

I still contest that your second evaluation in here:

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);
}
 }

is wrong. Look at it, and look at your graph.

You show what would be quadrant I of a plane where both X and Y are positive. So since both X and Y are positive, your comparison is wrong. You say if $val is less than 0, when it should be greater than. So the code should read:

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);
}
 }

That's not to mention since it's just one condition where you want it to be black, then just do an if()else{} not an if() elseif() like you have:

if($val == 0){
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("black");
$lineplot->mark->SetWidth(2);
 }
else{
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor("red");
$lineplot->mark->SetWidth(2);
}
 }

Hope that helps.

EDIT: After taking your exact coding and testing it out, and making my one minor change, it seems to work for me:
See it here

[sandy1028]

How will I add another condition if($val<0)

The code is working fine...
Is there any way to add the condition in
$lineplot->mark

Problem seems to be here

[bpat1434]

You can add as many conditions as you want. You could even us a switch statement...

foreach($value as $val){
	switch(true)
	{
		case $val == 0:
			$color = 'black';
		break;

	case $val < 0:
		$color = 'blue';
	break;

	default:
		$color = 'red';
	break;
}
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor($color);
$lineplot->mark->SetWidth(2);
}

[sandy1028]

How to add a condition not to fill any color when value is greater than 0

[bpat1434]

if($val > 0) { $lineplot->mark->SetFillColor('transparent'); }

although that's a guess.... you could either use the color of your background, or try the above to make it transparent. You could also try "none"....

[Weedpacket]

You could also modify the default clause of the switch statement to specify that; if $val is not less than zero, and it's not equal to zero, then .....

[sandy1028]

Actually my problem is
I $lineplot->mark is filled as black it $val==0.
Suppose $value=arrau(34,35,23,45,5)
the black is not marked.

$value=arrau(34,0,35,23,45,5)
here balck is marked for all the values

I just want the balck to be filled only at $val[1] place not for all the values

[bpat1434]

the above code does that..... There are two valid responses that do what you want. Please read them, and test them out:

Use an if() statement like you have

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);
}

Use a switch

    switch(true)
    {
        case $val == 0:
            $color = 'black';
        break;

    case $val < 0:
        $color = 'blue';
    break;

    default:
        $color = 'red';
    break;
}
$lineplot->mark->SetType(MARK_FILLEDCIRCLE);
$lineplot->mark->SetFillColor($color);
$lineplot->mark->SetWidth(2); 

Try one. Matter of fact, LOOK HERE for an example and the two contrasting codes (Note: the second block (i.e. inside the "else" statement) is the one that work as you want).

[sandy1028]

If $val > 0 I do not want to mark anything.

The mark should be filled for all the values in array.

I just want the mark where values is 0 that's it.

I do not want the mark as balck for all values.

IF there are 5 values in the array and suppose one value is 0 then for 4 values black or red or any color should not be filled.
Only where value is 0 black should be filled.

By testing I came to conclusion that I am finding problem with

$lineplot->mark

As $lineplot takes all the array.

How do I solve it

[sandy1028]

Hi,

I want the final graph to be lik this..

That is when value is 0 then the circle should be plotted.

I have attached the image.

Please help me with this

[bpat1434]

I don't think it's possible. I've been looking through the source, and it doesn't look like you can define one point to be designated, while the others aren't. That's a limitation of jpgraph. If you want help with that, ask the developers, or put in a feature request with them.

[sandy1028]

Please help me with this.

I am new to Jpgraphs

[bpat1434]

As am I. And we're not a support group for JPGraphs. For JPGraph support, please go ask at their forums here. Otherwise, you could add a feature request for this functionality here.