title: x-axis labels in coreplot not displayed
body: <p>I have attached the entire code which I am using but the x-axis label is not being generated .I have no clue where it is going wrong .I am a noob in core plot .PLease Help me out .Thanks in Advance and Happy New Year.       </p>
  
  <pre><code>#import "BarPlotViewController.h"
  
  @interface BarPlotViewController ()
  
  
  
  @end
  
  
  
  @implementation BarPlotViewController
  
  
  #define BAR_POSITION @"POSITION"
  #define BAR_HEIGHT @"HEIGHT"
  #define COLOR @"COLOR"
  #define CATEGORY @"CATEGORY"
  
  #define AXIS_START 0
  #define AXIS_END 50
  
  //
  @synthesize data;
  @synthesize graph;
  @synthesize hostingView;
  
  
  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
  {
      self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
      if (self) {
  
          self.data = [NSMutableArray array];
  
          int bar_heights[] = {20,30,10,40};
          UIColor *colors[] = {
              [UIColor redColor],
              [UIColor blueColor],
              [UIColor orangeColor],
              [UIColor purpleColor]};
          NSString *categories[] = {@"Plain Milk", @"Milk + Caramel", @"White", @"Dark"};
  
          for (int i = 0; i &lt; 4 ; i++){
              double position = i*10; //Bars will be 10 pts away from each other
              double height = bar_heights[i];
  
              NSDictionary *bar = [NSDictionary dictionaryWithObjectsAndKeys:
                                   [NSNumber numberWithDouble:position],BAR_POSITION,
                                   [NSNumber numberWithDouble:height],BAR_HEIGHT,
                                   colors[i],COLOR,
                                   categories[i],CATEGORY,
                                   nil];
              [self.data addObject:bar];
  
          }
          [self generateBarPlot];
      }
      return self;
  }
  
  - (void)viewDidLoad
  {
      [super viewDidLoad];
      // Do any additional setup after loading the view from its nib.
  }
  
  - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
      // Dispose of any resources that can be recreated.
  }
  
  - (void)generateBarPlot
  {
      //Create host view
      self.hostingView = [[CPTGraphHostingView alloc]
                          initWithFrame:[[UIScreen mainScreen]bounds]];
      [self.view addSubview:self.hostingView];
  
      //Create graph and set it as host view's graph
      self.graph = [[CPTXYGraph alloc] initWithFrame:self.hostingView.bounds];
      [self.hostingView setHostedGraph:self.graph];
  
      //set graph padding and theme
      self.graph.plotAreaFrame.paddingTop = 20.0f;
      self.graph.plotAreaFrame.paddingRight = 20.0f;
      self.graph.plotAreaFrame.paddingBottom = 70.0f;
      self.graph.plotAreaFrame.paddingLeft = 70.0f;
      [self.graph applyTheme:[CPTTheme themeNamed:kCPTDarkGradientTheme]];
  
      //set axes ranges
      CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)self.graph.defaultPlotSpace;
    //  plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(AXIS_START)                                            length:CPTDecimalFromFloat((AXIS_END - AXIS_START)+5)];
  
  
   //   plotSpace.xRange                = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(-1)                                                                   length:CPTDecimalFromInt(8)];
  
  
          CPTXYAxisSet *axisSet = (CPTXYAxisSet *)self.graph.axisSet;
  
      //X labels
      int labelLocations = 0;
      NSMutableArray *customXLabels = [NSMutableArray array];
     NSArray *dates = [NSArray arrayWithObjects:@"2012-05-01", @"2012-05-02", @"2012-05-03",
               @"2012-05-04", @"2012-05-05", @"2012-05-06", @"2012-05-07", nil];
      for (NSString *day in dates) {
          CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText:day textStyle:axisSet.xAxis.labelTextStyle];
          newLabel.tickLocation   = [[NSNumber numberWithInt:labelLocations] decimalValue];
          newLabel.offset         = axisSet.xAxis.labelOffset + axisSet.xAxis.majorTickLength;
       //   newLabel.rotation       = M_PI / 4;
          [customXLabels addObject:newLabel];
          labelLocations++;
  
      }
      axisSet.xAxis.axisLabels   = [NSSet setWithArray:customXLabels];
  
      plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:
                          CPTDecimalFromFloat(AXIS_START)
                                                      length:CPTDecimalFromFloat((AXIS_END - AXIS_START)+5)];
  
  
      //set axes' title, labels and their text styles
      CPTMutableTextStyle *textStyle = [CPTMutableTextStyle textStyle];
      textStyle.fontName = @"Helvetica";
      textStyle.fontSize = 14;
      textStyle.color = [CPTColor whiteColor];
      axisSet.xAxis.title = @"Years";
      axisSet.yAxis.title = @"Expenses";
      axisSet.xAxis.titleTextStyle = textStyle;
      axisSet.yAxis.titleTextStyle = textStyle;
      axisSet.xAxis.titleOffset = 30.0f;
      axisSet.yAxis.titleOffset = 40.0f;
      axisSet.xAxis.labelTextStyle = textStyle;
      axisSet.xAxis.labelOffset = 3.0f;
      axisSet.yAxis.labelTextStyle = textStyle;
      axisSet.yAxis.labelOffset = 3.0f;
  
  
      //set axes' line styles and interval ticks
      CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
      lineStyle.lineColor = [CPTColor whiteColor];
      lineStyle.lineWidth = 3.0f;
      axisSet.xAxis.axisLineStyle = lineStyle;
      axisSet.yAxis.axisLineStyle = lineStyle;
      axisSet.xAxis.majorTickLineStyle = lineStyle;
      axisSet.yAxis.majorTickLineStyle = lineStyle;
      axisSet.xAxis.majorIntervalLength = CPTDecimalFromFloat(5.0f);
      axisSet.yAxis.majorIntervalLength = CPTDecimalFromFloat(5.0f);
      axisSet.xAxis.majorTickLength = 7.0f;
      axisSet.yAxis.majorTickLength = 7.0f;
      axisSet.xAxis.minorTickLineStyle = lineStyle;
      axisSet.yAxis.minorTickLineStyle = lineStyle;
      axisSet.xAxis.minorTicksPerInterval = 1;
      axisSet.yAxis.minorTicksPerInterval = 1;
      axisSet.xAxis.minorTickLength = 5.0f;
      axisSet.yAxis.minorTickLength = 5.0f;
  
      // Create bar plot and add it to the graph
      CPTBarPlot *plot = [[CPTBarPlot alloc] init] ;
      plot.dataSource = self;
      plot.delegate = self;
      plot.barWidth = [[NSDecimalNumber decimalNumberWithString:@"5.0"]
                       decimalValue];
      plot.barOffset = [[NSDecimalNumber decimalNumberWithString:@"10.0"]
                        decimalValue];
      plot.barCornerRadius = 5.0;
      // Remove bar outlines
      CPTMutableLineStyle *borderLineStyle = [CPTMutableLineStyle lineStyle];
      borderLineStyle.lineColor = [CPTColor clearColor];
      plot.lineStyle = borderLineStyle;
      // Identifiers are handy if you want multiple plots in one graph
      plot.identifier = @"chocoplot";
      [self.graph addPlot:plot];
  
      }
  
  -(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
  {
      if ( [plot.identifier isEqual:@"chocoplot"] )
          return [self.data count];
  
      return 0;
  }
  
  -(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
  {
      if ( [plot.identifier isEqual:@"chocoplot"] )
      {
          NSDictionary *bar = [self.data objectAtIndex:index];
  
          if(fieldEnum == CPTBarPlotFieldBarLocation)
              return [bar valueForKey:BAR_POSITION];
          else if(fieldEnum ==CPTBarPlotFieldBarTip)
              return [bar valueForKey:BAR_HEIGHT];
      }
      return [NSNumber numberWithFloat:0];
  }
  
  
  -(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
  {
      if ( [plot.identifier isEqual: @"chocoplot"] )
      {
          CPTMutableTextStyle *textStyle = [CPTMutableTextStyle textStyle];
          textStyle.fontName = @"Helvetica";
          textStyle.fontSize = 14;
          textStyle.color = [CPTColor whiteColor];
  
          NSDictionary *bar = [self.data objectAtIndex:index];
  //        CPTTextLayer *label = [[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%@", [bar valueForKey:@"CATEGORY"]]];
  
          CPTTextLayer *label = [[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%@", [bar valueForKey:@"HEIGHT"]]];
  
          label.textStyle =textStyle;
  
          return label;
      }
  
      CPTTextLayer *defaultLabel = [[CPTTextLayer alloc] initWithText:@"Label"];
      return defaultLabel;
  
  }
  
  -(void)barPlot:(CPTBarPlot *)plot barWasSelectedAtRecordIndex:(NSUInteger)index
  {
      NSLog(@"barWasSelectedAtRecordIndex %d", index);
  }
  
  -(CPTFill *)barFillForBarPlot:(CPTBarPlot *)barPlot
                    recordIndex:(NSUInteger)index
  {
      if ( [barPlot.identifier isEqual:@"chocoplot"] )
      {
          NSDictionary *bar = [self.data objectAtIndex:index];
          CPTGradient *gradient = [CPTGradient gradientWithBeginningColor:[CPTColor whiteColor]
                                                              endingColor:[bar valueForKey:@"COLOR"]
                                                        beginningPosition:0.0 endingPosition:0.3 ];
          [gradient setGradientType:CPTGradientTypeAxial];
          [gradient setAngle:320.0];
  
          CPTFill *fill = [CPTFill fillWithGradient:gradient];
  
          return fill;
  
      }
      return [CPTFill fillWithColor:[CPTColor colorWithComponentRed:1.0 green:1.0 blue:1.0 alpha:1.0]];
  
  }
  
  @end
  </code></pre>
  
  <p>Main Code for plotting x-axis labels :
  This is the code for x-axis labels:  </p>
  
  <pre><code> CPTXYAxisSet *axisSet = (CPTXYAxisSet *)self.graph.axisSet;
  
      //X labels
      int labelLocations = 0;
      NSMutableArray *customXLabels = [NSMutableArray array];
     NSArray *dates = [NSArray arrayWithObjects:@"2012-05-01", @"2012-05-02", @"2012-05-03",
               @"2012-05-04", @"2012-05-05", @"2012-05-06", @"2012-05-07", nil];
      for (NSString *day in dates) {
          CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText:day textStyle:axisSet.xAxis.labelTextStyle];
          newLabel.tickLocation   = [[NSNumber numberWithInt:labelLocations] decimalValue];
          newLabel.offset         = axisSet.xAxis.labelOffset + axisSet.xAxis.majorTickLength;
       //   newLabel.rotation       = M_PI / 4;
          [customXLabels addObject:newLabel];
          labelLocations++;
  
      }
      axisSet.xAxis.axisLabels   = [NSSet setWithArray:customXLabels];
  </code></pre>