
Dear list, havig the following matrix

"Value"  "Class"
13.00    1
12.80    1
11.78    1
11.70    2
11.61    2
11.95    2
11.55    2
12.40    3
11.40    1
12.27    1
12.49    3
11.39    4
11.80    4
12.39    3
12.72    3
12.18    3
11.64    3
11.50    4
12.81    4
11.31    4
11.95    2
12.65    2
11.66    2
12.19    3
12.84    1
11.90    1
11.11    4
12.75    4

how can I specify that I want a boxplot of values for class 1 in one box and class 2 and 4 together in another box, without showing class 3?

Thanks in advance

D.

 		 	   		  
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