search for: feed_day

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Did you mean: feed_days
2013 Mar 02
3
if value is in vector, perform this function
...possible t values, do this command, else, do this command" if that makes sense. Here's what I have (and it doesn't work): params = c(1, 0.15, 0.164, 1) init = c(1.5, 0.05) t=seq(1,60, by=0.5) #all time values, experiment ran for 60 days #feeding sequence - every "3.5 days" feed_days = seq(1,60,by=3.5) Daphnia <- function(t,x,params){ C_D = x[2]; C_A = 0; for(t %in% feed_days){ if t == TRUE { C_A = 1.5 } else{ C_A = 0 }} gamma = params[1]; m_D = params[2]; K_q = params[3]; q_max = params[4]; M_D = m_D * C_D I_A = (C_D * q_max * C_A) / (K_q + C_A) r_D = ga...