reduce size of x-axis labels

pdb-plotting/src/main/java/org/lucares/recommind/logs/GnuplotSettings.java

@@ -10,23 +10,23 @@ public class GnuplotSettings {
 	private int width = 1600;
 	private String timefmt = "%Y-%m-%dT%H:%M:%S";
 
-	// set format x "%m-%d\n%H:%M"
+	// set format for x-axis
 	private String formatX = "%Y-%m-%d %H:%M:%S";
 
-	// set datafile separator ","
+	// set datafile separator
 	private String datafileSeparator = ",";
 
-	// set xlabel "Time"
+	// set xlabel
 	private String xlabel = "Time";
 
-	// set ylabel "Traffic"
+	// set ylabel
 	private String ylabel = "Duration in ms";
 
 	// set output "datausage.png"
 	private final Path output;
 
-	// set xtics rotate by 80
-	private int rotateXAxisLabel = -80;
+	// set xtics rotate by 10 degree
+	private int rotateXAxisLabel = -10;
 	private AxisScale yAxisScale;
 
 	public GnuplotSettings(final Path output) {

pdb-plotting/src/main/java/org/lucares/recommind/logs/Plotter.java

@@ -109,7 +109,8 @@ public class Plotter {
 			final GnuplotSettings gnuplotSettings = new GnuplotSettings(outputFile);
 			gnuplotSettings.setHeight(height);
 			gnuplotSettings.setWidth(width);
-			gnuplotSettings.setFormatX(getFormatX(minDate, maxDate));
+			defineXAxis(gnuplotSettings, minDate, maxDate);
+
 			gnuplotSettings.setYAxisScale(plotSettings.getYAxisScale());
 			gnuplot.plot(gnuplotSettings, dataSeries);
 
@@ -125,20 +126,29 @@ public class Plotter {
 		}
 	}
 
+	private void defineXAxis(final GnuplotSettings gnuplotSettings, final OffsetDateTime minDate,
+			final OffsetDateTime maxDate) {
+
+		String formatX;
+		int rotateX;
+		if (minDate.until(maxDate, ChronoUnit.WEEKS) > 1) {
+			formatX = "%Y-%m-%d";
+			rotateX = 0;
+		} else {
+
+			formatX = "%Y-%m-%d %H:%M:%S";
+			rotateX = gnuplotSettings.getRotateXAxisLabel();
+		}
+
+		gnuplotSettings.setFormatX(formatX);
+		gnuplotSettings.setRotateXAxisLabel(rotateX);
+	}
+
 	private String uniqueDirectoryName() {
 		return OffsetDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd_HH_mm_ss")) + "_"
 				+ UUID.randomUUID().toString();
 	}
 
-	private String getFormatX(final OffsetDateTime minDate, final OffsetDateTime maxDate) {
-
-		if (minDate.until(maxDate, ChronoUnit.WEEKS) > 1) {
-			return "%Y-%m-%d";
-		}
-
-		return "%Y-%m-%d %H:%M:%S";
-	}
-
 	private void sortAndLimit(final List<DataSeries> dataSeries, final PlotSettings plotSettings) {
 
 		final Limit limitBy = plotSettings.getLimitBy();