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我在PHP中使用jpg圖形實現了一個多圖:第一個和第二個plot在左邊具有相同的比例尺,第三個plot具有不同的比例或值範圍,該軸位於右側。 隨着代碼:jpgraph中的多個y軸
$width=700;
$height=500;
// Create the graph and set a scale.
// These two calls are always required
$graph = new Graph($width, $height);
$graph->SetScale("intlin"); // X and Y axis
$graph->SetY2Scale("lin"); // Y2 axis
$theme_class=new UniversalTheme;
$graph->SetTheme($theme_class);
$graph->img->SetAntiAliasing(false);
$graph->title->Set('Filled Y-grid');
$graph->SetBox(false);
$graph->xaxis->title->Set("Days");
$graph->img->SetAntiAliasing();
// Create the first line
$p1 = new LinePlot($ydata1);
$graph->Add($p1);
$p1->SetColor("#0033FF");
$p1->SetLegend('Rain');
// Create the second line
$p2 = new LinePlot($ydata2);
$graph->Add($p2);
$p2->SetColor("#33FFFF");
$p2->SetLegend('Irrigation');
// Create the third line
$p3 = new LinePlot($ydata3);
$graph->AddY2($p3);
$p3->SetColor("#000000");
$p3->SetLegend('Relative Soil Moisture');
$graph->legend->SetFrameWeight(0);
// Setup a title for the graph
$graph->title->Set($titolo);
$nome_img=substr($titolo, 0, -10);
// Display the graph
$graph->Stroke("tmp/graph_$nome_img.png");
echo "<img src=\"tmp/graph_$nome_img.png\"> ";
我只有軸左,右軸不會出現。你看到附加的immage。 有一些錯誤? 謝謝。