Hello everybody,
i have the following function, which i want to solve for b
i=1,..,n, and n is the length of t and t is the last element of t, if
you do cumsum() before.
(t_n*exp(-b*t_n)*sum_{i=1}^{n} f_i) / (1-exp(-b*t_n)) - (sum_{i=1}^{n}
(f_i*(t_i*exp(-b*t_i)-t_{i-1}*exp(-b*t_{i-1}))) /
Dear Colleagues,
As a novice I was trying to calculate Shannon diversity index using
diversity function in vegan package and kept having same error message.
Error in sum(..., na.rm = na.rm) : invalid 'mode' of argument
My dataset is from microarray and have abundant missing values, so
On Wed, 2005-08-10 at 08:13 -0400, Kang, Sang-Hoon wrote:
As a novice I was trying to calculate Shannon diversity index using
diversity function in vegan package and kept having same error message.
Error in sum(..., na.rm = na.rm) : invalid 'mode' of argument
This error (which is from sum())
