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.
What percentage of people go into remission and later get cancer again (either the same type of cancer or some other type of cancer) and thus come out of remission and become cancer patients again? What is the average âlength of life since diagnosisâ for those who come out of remission and get cancer again?