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+#' @title Compute the accuracy score
+#'
+#' @param y.true vector of true labels
+#' @param y.pred vector of predicted labels
+#'
+#' @author
+#' Gerrit J.J. van den Burg, Patrick J.F. Groenen \cr
+#' Maintainer: Gerrit J.J. van den Burg <gertjanvandenburg@gmail.com>
+#'
+#' @references
+#' Van den Burg, G.J.J. and Groenen, P.J.F. (2016). \emph{GenSVM: A Generalized 
+#' Multiclass Support Vector Machine}, Journal of Machine Learning Research, 
+#' 17(225):1--42. URL \url{http://jmlr.org/papers/v17/14-526.html}.
+#'
+#' @seealso
+#' \code{\link{predict.gensvm.grid}}
+#'
+#' @export
+#'
+#' @examples
+#' x <- iris[, -5]
+#' y <- iris[, 5]
+#'
+#' fit <- gensvm(x, y)
+#' gensvm.accuracy(predict(fit, x), y)
+#'
+gensvm.accuracy <- function(y.true, y.pred)
+{
+    n <- length(y.true)
+    if (n != length(y.pred)) {
+        cat("Error: Can't compute accuracy if vector don't have the ",
+            "same length\n")
+        return
+    }
+
+    return (sum(y.true == y.pred) / n)
+}