Left: number and fraction of sources present in the radio-selected and/or infrared-selected samples for: all objects in the jointly-selected sample (top), only objects classified as star-forming galaxies (bottom). The grey boxes to the left (right) in each image show the fractions relevant to the infrared- (radio-) selected sample only. Right: same as for the left but including radio detections identified in convolved 3 GHz maps. These samples therefore show which objects are detected (as opposed to selected) in the infrared and/or radio (see Sect. 2.1.3).