sample.NumUnit = map[string][]string{key: unit}
		} else {
			sample.NumUnit[key] = unit
		}
	}
}

// RemoveNumLabel removes all numerical labels associated with the specified key for all
// samples in the profile.
func (p *Profile) RemoveNumLabel(key string) {
	for _, sample := range p.Sample {
		delete(sample.NumLabel, key)
		delete(sample.NumUnit, key)
	}
}