jpgraph does´t work. There is no lineplot. But a dark window with a small square.

Werner Werni335

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Jun 27, 2019, 7:35:10 AM6/27/19

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I wanted to creat a grph within jpgraph but instead the graph it shows a dark window with a little square in it. The logfile tells me that there is an error in the file jpgraph.php in line 4025. Must be an cache error.

Has anybody had the same problem? Is ther a solution?

Thank you for your help.

SEMPERVIVUM1412

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Jun 27, 2019, 7:37:52 AM6/27/19

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Shurely there is a solution but in order to find and fix the error one has to view your code. Please post it.

David Martin

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Jun 27, 2019, 7:38:27 AM6/27/19

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Please post enough of your code and data to allow us to try and replicate your problem. Without being able to see the failure and the code that causes the failure all we can do is take wild guesses.

Werner Werni335

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Jun 27, 2019, 7:40:11 AM6/27/19

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<?php

require '/usr/share/jpgraph/jpgraph.php';

require '/usr/share/jpgraph/jpgraph_line.php';

require '/usr/share/jpgraph/jpgraph_bar.php';

$ydata = array(11,3,8,7,5,1,9,13,5,7,15);

$xdata = array(1,2,3,4,5,6,7,8,9,10,11);

#

#$graph->clearTheme();

$graph = new Graph(350,250);

$graph->SetScale('intlin');

#

$graph->img->SetMargin(40,20,20,40);

$graph->title->Set("Werner");

$graph->xaxis->title->Set("id");

$graph->yaxis->title->Set("hallo");

$graph->yaxis->SetColor("blue");

#

$lineplot=new LinePlot($xdata,$ydata);

$lineplot->SetStepStyle();

$lineplot->SetColor( "blue" );

$lineplot->SetWeight(0);

#

$graph->Add($lineplot);

#

$graph->xaxis->SetPos("min");

#

$graph->Stroke();

###### Plot Ende

#

$erg->free();

$db->close();

#

?>

Werner Werni335

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Jun 27, 2019, 7:40:47 AM6/27/19

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Sorry. Of course you are right. Thank you for your help!

Werner Werni335

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Jun 27, 2019, 7:45:09 AM6/27/19

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I forgot to tell that it is running on a Raspberry pi 3 ModelB+

SEMPERVIVUM1412

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Jun 27, 2019, 7:59:08 AM6/27/19

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After having adjusted the paths this code works fine for me. Which version of jpgraph are you using? The manual says:

Please note that it is not possible to run the "3.x.y" series on PHP7.0. If you need to run on PHP7.0 then you must use the 4.x version of the library.

Werner Werni335

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Jun 27, 2019, 8:01:00 AM6/27/19

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Thank you a lot! How can I get the version i am running?

SEMPERVIVUM1412

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Jun 27, 2019, 8:02:59 AM6/27/19

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Obviously in gpgrap.php this is indicating the version:

// Version info
define('JPG_VERSION','4.2.6');

David Martin

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Jun 27, 2019, 8:03:23 AM6/27/19

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Near the top of jpgraph.php you will see the define that shows the version.

define('JPG_VERSION','4.2.0');

David Martin

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Jun 27, 2019, 8:03:59 AM6/27/19

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Your code works just fine with version 4.2.0 of JPGraph.

Werner Werni335

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Jun 27, 2019, 8:07:07 AM6/27/19

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If I punsh in define('...... then I always get a syntax error

Werner Werni335

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Jun 27, 2019, 8:07:59 AM6/27/19

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How can I install this jpgraph version?

David Martin

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Jun 27, 2019, 8:08:45 AM6/27/19

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I'm not at all sure what you mean but that is something you should not touch. It's part of the package and tells you what the version is.

David Martin

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Jun 27, 2019, 8:15:54 AM6/27/19

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Download a copy from https://jpgraph.net/download/

Werner Werni335

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Jun 27, 2019, 8:18:15 AM6/27/19

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I am running php7 version. And jpgraph4.2.7

David Martin

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Jun 27, 2019, 8:24:21 AM6/27/19

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As am I and your code works just fine. PHP 7.3.6 and JPGraph 4.2.7.

SEMPERVIVUM1412

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Jun 27, 2019, 8:33:58 AM6/27/19

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The system requirements say:

The PHP installation must have the low level graphic primitive library "GD"

I recommend to check this.

Werner Werni335

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Jun 27, 2019, 8:51:09 AM6/27/19

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how can I do that? It seems that there is nothing simular:

Werner Werni335

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Jun 27, 2019, 8:51:56 AM6/27/19

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it has a gd.ini file

SEMPERVIVUM1412

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Jun 27, 2019, 8:53:12 AM6/27/19

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phpinfo() will tell you.

https://jpgraph.net/download/manuals/chunkhtml/ch03s02.html

Werner Werni335

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Jun 27, 2019, 9:12:13 AM6/27/19

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OK. Thank you. It seems that the GD is working.

SEMPERVIVUM1412

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Jun 27, 2019, 9:17:02 AM6/27/19

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Then I'm helpless. Is the code you posted complete or did you simplify something?

Werner Werni335

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Jun 27, 2019, 9:18:39 AM6/27/19

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Thank you anyway. I am at least a bit closer to a solution.

Thankx!!

David Martin

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Jun 27, 2019, 9:50:44 AM6/27/19

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In your code you have

$erg->free();
$db->close();

near the end of the file. Since those weren't defined in what you posted take them out or comment them out and see if works. As a couple of us have said, the code you posted, without those 2 lines of course, is working just fine.

If you are doing DB queries to get the data make sure that the results from the queries are actually what you think they are using

var_dump($variable_name);

Werner Werni335

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Jun 27, 2019, 10:14:45 AM6/27/19

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Thank you. I still have the problem. It is that I can not install the jpgraph-4.2.7.tar.gz on the rasoberry. I don´t know how i can install this package?

Werner Werni335

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Jun 27, 2019, 10:15:40 AM6/27/19

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It says "use GD version that comes with PHP and not the standalone version" How?

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