To construct at least one cluster of data records of a scatter plot, cells representing the data records are placed in a visualization screen according to values of a first attribute and a second attribute of the data records. Visual indicators are assigned to the cells according to values of a third attribute of the data records. In response to detecting data records having a particular pair of first attribute and second attribute values, cells representing the data records having the particular pair of first attribute and second attribute values are placed in nearby positions according to similarity of values of the third attribute to form the at least one cluster of cells having similar visual indicators.