pkg/R/plot.R

   1 # extractParam
   2 #
   3 # Extract successive values of a projection of the parameter(s)
   4 #
   5 # @inheritParams plotHist
   6 #
   7 extractParam <- function(mr, x=1, y=1)
   8 {
   9   # Obtain L vectors where L = number of res lists in mr
  10   lapply( mr, function(mr_list) {
  11     sapply(mr_list, function(m) m[x,y])
  12   } )
  13 }
  14
  15 #' plotHist
  16 #'
  17 #' Plot histogram
  18 #'
  19 #' @param mr Output of multiRun(), list of lists of functions results
  20 #' @param x Row index of the element inside the aggregated parameter
  21 #' @param y Column index of the element inside the aggregated parameter
  22 #'
  23 #' @examples
  24 #' \donttest{
  25 #' β <- matrix(c(1,-2,3,1),ncol=2)
  26 #' mr <- multiRun(...) #see bootstrap example in ?multiRun : return lists of mu_hat
  27 #' μ <- normalize(β)
  28 #' for (i in 1:2)
  29 #'   mr[[i]] <- alignMatrices(res[[i]], ref=μ, ls_mode="exact")
  30 #' plotHist(mr, 2, 1) #second row, first column}
  31 #' @export
  32 plotHist <- function(mr, x, y)
  33 {
  34   params <- extractParam(mr, x, y)
  35   L = length(params)
  36   # Plot histograms side by side
  37   par(mfrow=c(1,L), cex.axis=1.5, cex.lab=1.5, mar=c(4.7,5,1,1))
  38   for (i in 1:L)
  39     hist(params[[i]], breaks=40, freq=FALSE, xlab="Parameter value", ylab="Density")
  40 }
  41
  42 #' plotBox
  43 #'
  44 #' Draw boxplot
  45 #'
  46 #' @inheritParams plotHist
  47 #'
  48 #' @examples
  49 #' #See example in ?plotHist
  50 #' @export
  51 plotBox <- function(mr, x, y, xtitle="")
  52 {
  53   params <- extractParam(mr, x, y)
  54   L = length(params)
  55   # Plot boxplots side by side
  56   par(mfrow=c(1,L), cex.axis=1.5, cex.lab=1.5, mar=c(4.7,5,1,1))
  57   for (i in 1:L)
  58     boxplot(params[[i]], xlab=xtitle, ylab="Parameter value")
  59 }
  60
  61 #' plotCoefs
  62 #'
  63 #' Draw coefs estimations + standard deviations
  64 #'
  65 #' @inheritParams plotHist
  66 #' @param params True value of parameters matrix
  67 #' @param idx List index to process in mr
  68 #'
  69 #' @examples
  70 #' #See example in ?plotHist
  71 #' @export
  72 plotCoefs <- function(mr, params, idx, xtitle="Parameter")
  73 {
  74   L <- nrow(mr[[1]][[1]])
  75   K <- ncol(mr[[1]][[1]])
  76
  77   params_hat <- matrix(nrow=L, ncol=K)
  78   stdev <- matrix(nrow=L, ncol=K)
  79   for (x in 1:L)
  80   {
  81     for (y in 1:K)
  82     {
  83       estims <- extractParam(mr, x, y)
  84       params_hat[x,y] <- mean(estims[[idx]])
  85 #      stdev[x,y] <- sqrt( mean( (estims[[idx]] - params[x,y])^2 ) )
  86       # HACK remove extreme quantile in estims[[i]] before computing sd()
  87       stdev[x,y] <- sd( estims[[idx]] ) #[ estims[[idx]] < max(estims[[idx]]) & estims[[idx]] > min(estims[[idx]]) ] )
  88     }
  89   }
  90
  91   par(cex.axis=1.5, cex.lab=1.5, mar=c(4.7,5,1,1))
  92   params <- as.double(params)
  93   o <- order(params)
  94   avg_param <- as.double(params_hat)
  95   std_param <- as.double(stdev)
  96   matplot(cbind(params[o],avg_param[o],avg_param[o]+std_param[o],avg_param[o]-std_param[o]),
  97     col=1, lty=c(1,5,3,3), type="l", lwd=2, xlab=xtitle, ylab="")
  98
  99   #print(o) #not returning o to avoid weird Jupyter issue... (TODO:)
 100 }
 101
 102 #' plotQn
 103 #'
 104 #' Draw 3D map of objective function values
 105 #'
 106 #' @param N Number of starting points
 107 #' @param n Number of points in sample
 108 #' @param p Vector of proportions
 109 #' @param b Vector of biases
 110 #' @param β Regression matrix (target)
 111 #' @param link Link function (logit or probit)
 112 #'
 113 #' @export
 114 plotQn <- function(N, n, p, β, b, link)
 115 {
 116   d <- nrow(β)
 117   K <- ncol(β)
 118   io <- generateSampleIO(n, p, β, b, link)
 119   op <- optimParams(K, link, list(X=io$X, Y=io$Y))
 120   # N random starting points gaussian (TODO: around true β?)
 121   res <- matrix(nrow=d*K+1, ncol=N)
 122   for (i in seq_len(N))
 123   {
 124     β_init <- rnorm(d*K)
 125     par <- op$run( c(rep(1/K,K-1), β_init, rep(0,K)) )
 126     par <- op$linArgs(par)
 127     Qn <- op$f(par)
 128     res[,i] = c(Qn, par[K:(K+d*K-1)])
 129   }
 130   res #TODO: plot this, not just return it...
 131 }