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					|  |  |  |             /** Queries the backend for audio feature data, draws the bar chart | 
			
		
	
		
			
				
					|  |  |  |              *  illustrating the frequencies of values, and appends the chart to | 
			
		
	
		
			
				
					|  |  |  |              *  <body></body> | 
			
		
	
		
			
				
					|  |  |  |              *  a designated parent element | 
			
		
	
		
			
				
					|  |  |  |              * | 
			
		
	
		
			
				
					|  |  |  |              *  @param audioFeature: the name of the audio feature (string) | 
			
		
	
		
			
				
					|  |  |  |              *  @param intervalEndPoints: a sorted array of 5 real numbers defining the intervals (categories) of values, | 
			
		
	
	
		
			
				
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