未使用的参数问题

Unused argument issue

我正在使用下面的简单代码,但出现错误:“func(time, state, parms, ...) 错误:未使用的参数 (state, parms)”。看起来每当我使用“function(koff_WT)”函数时都会出现此错误,否则模型运行良好。 有什么建议可能出了什么问题吗?

library(deSolve)
kon_WT = 1e-4         
kd_WT = 0.01        
koff_WT = kon_WT*kd_WT 
R_WT = 1000       

Complex <- function(koff_WT) {
 function (t,y,parms){
  with(as.list(y,parms), {
    
    dC_WT <-  koff_WT*RL_WT -kon_WT*R_WT*C_WT 
    dRL_WT <- kon_WT*R_WT*C_WT - koff_WT*RL_WT   #nM
    dR_WT <-  koff_WT*RL_WT -kon_WT*R_WT*C_WT 
        
    return(list(c(dC_WT, dRL_WT, dR_WT)))
  })
  }
}

yini <- c(C_WT = 0.1, RL_WT = 0, R_WT= R_WT)
times <- seq(0,40000,100)      
Out <- ode(y = yini, times = times, func=Complex, parms=NULL)

Output <- data.frame(Out)
Result <- Complex(koff_WT =1) ; Result

Complex() 是一个 factory,即 returns 是 ode 所期望类型的函数。所以你需要用 func=Complex(...) 调用 ode 而不是 func=Complex.

Out <- ode(y = yini, times = times, 
      func=Complex(koff_WT=1), parms=NULL)

原始代码有几个问题,#1 已经由 Ben Bolker 展示(我只是把它放在单独的一行),#2 在 with 函数中缺少 c(),#3 参数太大值,使模型立即下降。 #1 和#2 是编程问题,#3 是建模决策。最后一点代码化妆品以提高可读性。

library(deSolve)
kon_WT  <- 1e-4         
kd_WT   <- 0.01        
koff_WT <- kon_WT * kd_WT 
R_WT    <- 1 # 1000                  # (3) R_WT was too high

Complex <- function(koff_WT) {
  function (t, y, parms){
    with(as.list(c(y,parms)), {      # (2) note c() to combine the vectors
      
      dC_WT <-  koff_WT * RL_WT     - kon_WT  * R_WT * C_WT 
      dRL_WT <- kon_WT  * R_WT*C_WT - koff_WT * RL_WT   #nM
      dR_WT <-  koff_WT * RL_WT     - kon_WT  * R_WT * C_WT 
      
      return(list(c(dC_WT, dRL_WT, dR_WT)))
    })
  }
}

yini <- c(C_WT = 0.1, RL_WT = 0, R_WT = R_WT)
times <- seq(0, 40000, 100)

model <- Complex(koff_WT) # (1) Complex is a factory (or closure), returning a function

Out <- ode(y = yini, times = times, func = model, parms = NULL)

plot(Out)