[JpGraph] La courbe sort du graphique lorsque toutes les données sont négatives

**[ZiP]** · 27/12/2008, 10h10

Bonjour,

Pour mon site de météorologie, j'utilise JPGraph pour créer mes différents graphiques cependant lorsque les données sont toutes négatives comme maintenant la courbe sort de sa zone pour aller jusqu'en au de l'image à travers le titre du graphique comme par exemple :

Voici mon code avec les données extraites de MySQL sous forme de tableau vous permettant de tester mon code en remplaçant juste l'emplacement de la librairie JPGraph en début de script :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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<?php
	include('configuration.php');
	include(PATH_JPGRAPH.'jpgraph.php');
	include(PATH_JPGRAPH.'jpgraph_date.php');
	include(PATH_JPGRAPH.'jpgraph_regstat.php');
	include(PATH_JPGRAPH.'jpgraph_line.php');
 
	function FormatXLabel($valeur)
	{
		return date("H:i\nd/m",$valeur);
	}
 
	function FormatYLabel($valeur)
	{
		return sprintf("%01.1f",$valeur);
	}
 
	//----------------------------------------------------------------------------------------------------
 
	$pointderosee_datax = array(1230281400,1230281460,1230281520,1230281580,1230281640,1230281700,1230281760,1230281820,1230281880,1230281940,1230282000,1230282060,1230282120,1230282180,1230282240,1230282300,1230282360,1230282420,1230282480,1230282540,1230282600,1230282660,1230282720,1230282780,1230282840,1230282900,1230282960,1230283020,1230283080,1230283140,1230283200,1230283260,1230283320,1230283380,1230283440,1230283500,1230283560,1230283620,1230283680,1230283740,1230283800,1230283860,1230283920,1230283980,1230284040,1230284100,1230284160,1230284220,1230284280,1230284340,1230284400,1230284460,1230284520,1230284580,1230284640,1230284700,1230284760,1230284820,1230284880,1230284940,1230285000,1230285060,1230285120,1230285180,1230285240,1230285300,1230285360,1230285420,1230285480,1230285540,1230285600,1230285660,1230285720,1230285780,1230285840,1230285900,1230285960,1230286020,1230286080,1230286140,1230286200,1230286260,1230286320,1230286380,1230286440,1230286500,1230286560,1230286620,1230286680,1230286740,1230286800,1230286860,1230286920,1230286980,1230287040,1230287100,1230287160,1230287220,1230287280,1230287340,1230287400,1230287460,1230287520,1230287580,1230287640,1230287700,1230287760,1230287820,1230287880,1230287940,1230288000,1230288060,1230288120,1230288180,1230288240,1230288300,1230288360,1230288420,1230288480,1230288540,1230288600,1230288660,1230288720,1230288780,1230288840,1230288900,1230288960,1230289020,1230289080,1230289140,1230289200,1230289260,1230289320,1230289380,1230289440,1230289500,1230289560,1230289620,1230289680,1230289740,1230289800,1230289860,1230289920,1230289980,1230290040,1230290100,1230290160,1230290220,1230290280,1230290340,1230290400,1230290460,1230290520,1230290580,1230290640,1230290700,1230290760,1230290820,1230290880,1230290940,1230291000,1230291060,1230291120,1230291180,1230291240,1230291300,1230291360,1230291420,1230291480,1230291540,1230291600,1230291660,1230291720,1230291780,1230291840,1230291900,1230291960,1230292020,1230292080,1230292140,1230292200,1230292260,1230292320,1230292380,1230292440,1230292500,1230292560,1230292620,1230292680,1230292740,1230292800,1230292860,1230292920,1230292980,1230293040,1230293100,1230293160,1230293220,1230293280,1230293340,1230293400,1230293460,1230293520,1230293580,1230293640,1230293700,1230293760,1230293820,1230293880,1230293940,1230294000,1230294060,1230294120,1230294180,1230294240,1230294300,1230294360,1230294420,1230294480,1230294540,1230294600,1230294660,1230294720,1230294780,1230294840,1230294900,1230294960,1230295020,1230295080,1230295140,1230295200,1230295260,1230295320,1230295380,1230295440,1230295500,1230295560,1230295620,1230295680,1230295740,1230295800,1230295860,1230295920,1230295980,1230296040,1230296100,1230296160,1230296220,1230296280,1230296340,1230296400,1230296460,1230296520,1230296580,1230296640,1230296700,1230296760,1230296820,1230296880,1230296940,1230297000,1230297060,1230297120,1230297180,1230297240,1230297300,1230297360,1230297420,1230297480,1230297540,1230297600,1230297660,1230297720,1230297780,1230297840,1230297900,1230297960,1230298020,1230298080,1230298140,1230298200,1230298260,1230298320,1230298380,1230298440,1230298500,1230298560,1230298620,1230298680,1230298740,1230298800,1230298860,1230298920,1230298980,1230299040,1230299100,1230299160,1230299220,1230299280,1230299340,1230299400,1230299460,1230299520,1230299580,1230299640,1230299700,1230299760,1230299820,1230299880,1230299940,1230300000,1230300060,1230300120,1230300180,1230300240,1230300300,1230300360,1230300420,1230300480,1230300540,1230300600,1230300660,1230300720,1230300780,1230300840,1230300900,1230300960,1230301020,1230301080,1230301140,1230301200,1230301260,1230301320,1230301380,1230301440,1230301500,1230301560,1230301620,1230301680,1230301740,1230301800,1230301860,1230301920,1230301980,1230302040,1230302100,1230302160,1230302220,1230302280,1230302340,1230302400,1230302460,1230302520,1230302580,1230302640,1230302700,1230302760,1230302820,1230302880,1230302940,1230303000,1230303060,1230303120,1230303180,1230303240,1230303300,1230303360,1230303420,1230303480,1230303540,1230303600,1230303660,1230303720,1230303780,1230303840,1230303900,1230303960,1230304020,1230304080,1230304140,1230304200,1230304260,1230304320,1230304380,1230304440,1230304500,1230304560,1230304620,1230304680,1230304740,1230304800,1230304860,1230304920,1230304980,1230305040,1230305100,1230305160,1230305220,1230305280,1230305340,1230305400,1230305460,1230305520,1230305580,1230305640,1230305700,1230305760,1230305820,1230305880,1230305940,1230306000,1230306060,1230306120,1230306180,1230306240,1230306300,1230306360,1230306420,1230306480,1230306540,1230306600,1230306660,1230306720,1230306780,1230306840,1230306900,1230306960,1230307020,1230307080,1230307140,1230307200,1230307260,1230307320,1230307380,1230307440,1230307500,1230307560,1230307620,1230307680,1230307740,1230307800,1230307860,1230307920,1230307980,1230308040,1230308100,1230308160,1230308220,1230308280,1230308340,1230308400,1230308460,1230308520,1230308580,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230366360,1230366420,1230366480,1230366540,1230366600,1230366660,1230366720,1230366780,1230366840,1230366900,1230366960,1230367020,1230367080,1230367140,1230367200,1230367260);
	$pointderosee_datay = 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	//----------------------------------------------------------------------------------------------------
 
	$pointderosee = new Graph(540,350);
	$pointderosee->SetAlphaBlending();
	$pointderosee->SetFrame(true,'white',1);
	$pointderosee->SetMarginColor('white');
	$pointderosee->SetMargin(65,5,45,75);
	$pointderosee->SetScale("datlin");
	$pointderosee->title->Set('TITLE');
	$pointderosee->subtitle->Set('SUBTITLE');
	$pointderosee->xaxis->SetLabelFormatCallback('FormatXLabel');
	$pointderosee->xaxis->SetTextLabelInterval(2);
	$pointderosee->xaxis->SetPos('min');
	$pointderosee->xgrid->Show();
	$pointderosee->xaxis->scale->SetTimeAlign(MINADJ_1);
	$pointderosee->yaxis->SetLabelFormatCallback('FormatYLabel');
	$pointderosee->yaxis->title->Set("Point de rosée (°C)");
	$pointderosee->yaxis->SetTitleMargin(50);
 
	if( count($pointderosee_datay) < 1 )
	{
		$pointderosee_datax[0] = $date_debut;
		$pointderosee_datay[0] = 0;
		$pointderosee_datax[1] = $date_fin;
		$pointderosee_datay[1] = 0;
	}	
 
	$pointderosee_spline = new Spline($pointderosee_datax,$pointderosee_datay);
	list($pointderosee_newx,$pointderosee_newy) = $pointderosee_spline->Get(50);
	$pointderosee_courbe = new LinePlot($pointderosee_newy,$pointderosee_newx);
 
	$pointderosee_courbe->SetColor('#458B00');
	$pointderosee_courbe->SetFillColor('darkolivegreen3@0.4');
 
	$pointderosee->Add($pointderosee_courbe);
 
	$pointderosee->Stroke();
?>

Je n'arrive pas à régler ce problème afin que la courbe reste dans sa zone, pouvez-vous m'aider ?

Merci,
Mathieu

**faraudch** · 30/12/2008, 22h15

Bonjour,
Je pense que la couleur dépasse car le zéro de l'axe des Y n'est pas affiché et SetFillColor rempli à partir de zéro.
Je te propose 2 solutions :
Afficher la valeur Y=0 en modifiant ton SetScale de la façon suivante :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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	if ((max($pointderosee_datay)<0)){
		$max_value=0;
	}
	else 	$max_value=max($pointderosee_datay);
	$pointderosee->SetScale("datlin",min($pointderosee_datay),$max_value);

ou alors en "coloriant" l'autre côté de la courbe si toutes les valeurs sont négatives, après SetFillColor tu rajoutes :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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	$pointderosee_courbe->SetFillColor('darkolivegreen3@0.4');
	if ((max($pointderosee_datay)<0)){
		$pointderosee_courbe->SetFillFromYMin();
	}

Dis nous si une des 2 réponses te convient.

Bonne fêtes de fin d'année.

**[ZiP]** · 30/12/2008, 22h39

Bonjour,

La première solution semble fonctionner à merveille.

Je l'ai mise en test sur les courbes 24h de température et point de rosée.

Bonnes fêtes de fin d'année !

Merci,
Mathieu

[JpGraph] La courbe sort du graphique lorsque toutes les données sont négatives

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