When we write vectors as matrices, we tend to write an $n$-dimensional vector vector as $n \times 1$ column matrix. We emphasize that the gradient vector is defined only for scalar-valued functions. For vector valued functions, we will stick with viewing the derivative as a matrix.
Gloomy Addiction Relapse Statistics. Drug and alcohol rehab statistics show that the percentage of people who will relapse after a period recovery ranges from 50% to 90%. This is a frightening statistic and it is often used as justification for those who wish to carry on with their addiction.
The percentage of patients with Chronic Obstructive Pulmonary Disease (COPD) who met the Proportion of Days Covered (PDC) threshold of 80 percent during the measurement period for: Long-acting inhaled bronchodilator agents.