Remove UTF-8 from epidemic_threshold()'s documentation

- Caused errors installing in some locales (bug report Javad)

DESCRIPTION

 Package: mapMCDA
 Title: Produce an epidemiological risk map by weighting multiple risk
         factors
-Version: 0.4.8
-Date: 2019-04-12
+Version: 0.4.9
+Date: 2019-04-24
 Authors@R: c( person("Andrea", "Apolloni", email =
         "andrea.apolloni@cirad.fr", role = c("ctb"), comment = "Animal
         mobility algorithm"), person("Elena", "Arsevska", email =

R/network.R

@@ -274,15 +274,15 @@ setMethod(
 #' network. It is computed as the inverse of the \emph{Potential for
 #' transmission} of the network: a measure of the expected number of
 #' nodes affected by an infectious node, which is a generalisation of
-#' the Basic Reproduction Number \eqn{R_0}{R₀} of an epidemy to the
+#' the Basic Reproduction Number \eqn{R_0} of an epidemy to the
 #' context of a network. It thus quantifies the potential for
 #' transmission of an infection throughout the contact network. It is
 #' computed in terms of the incoming-outgoing rates from the network's
 #' nodes: \deqn{R_0 = \beta \frac{\hat{k_\mathrm{in}
-#' k_\mathrm{out}}}{\hat{k_\mathrm{in}}},}{R₀ = \beta〈k_in*k_out〉/〈k_in〉,}
+#' k_\mathrm{out}}}{\hat{k_\mathrm{in}}},}{R_0 = \beta <k_in*k_out>/<k_in>,}
 #' where \eqn{\beta} is the transmission coefficient among animals,
 #' \eqn{k_\mathrm{in/out}}{k_in/out} are the in/out-degrees of a node
-#' and the \eqn{\hat{\cdot}}{〈·〉} symbol represents the average value
+#' and the \eqn{<·>} symbol represents the average value
 #' across all nodes in the graph.
 #'
 #' The unweighted value computed above is most appropriate for a
@@ -303,7 +303,7 @@ setMethod(
 #' @param beta numeric, between 0 and 1. Probability of transmission.
 #'
 #' @return a list the weighted and unweighted Potential for
-#'   Transmission \eqn{R_0}{R₀} and its inverse, the Epidemic
+#'   Transmission \eqn{R_0} and its inverse, the Epidemic
 #'   Threshold \eqn{q}. As an attribute named "sna", a data.frame with
 #'   the in/out-degrees of each node and their individual contribution
 #'   to R0.

man/epidemic_threshold.Rd

@@ -13,7 +13,7 @@ epidemic_threshold(x, beta = 1)
 }
 \value{
 a list the weighted and unweighted Potential for
-  Transmission \eqn{R_0}{R₀} and its inverse, the Epidemic
+  Transmission \eqn{R_0} and its inverse, the Epidemic
   Threshold \eqn{q}. As an attribute named "sna", a data.frame with
   the in/out-degrees of each node and their individual contribution
   to R0.
@@ -29,15 +29,15 @@ transmission coefficient necessary for diffusing an epidemy in a
 network. It is computed as the inverse of the \emph{Potential for
 transmission} of the network: a measure of the expected number of
 nodes affected by an infectious node, which is a generalisation of
-the Basic Reproduction Number \eqn{R_0}{R₀} of an epidemy to the
+the Basic Reproduction Number \eqn{R_0} of an epidemy to the
 context of a network. It thus quantifies the potential for
 transmission of an infection throughout the contact network. It is
 computed in terms of the incoming-outgoing rates from the network's
 nodes: \deqn{R_0 = \beta \frac{\hat{k_\mathrm{in}
-k_\mathrm{out}}}{\hat{k_\mathrm{in}}},}{R₀ = \beta〈k_in*k_out〉/〈k_in〉,}
+k_\mathrm{out}}}{\hat{k_\mathrm{in}}},}{R_0 = \beta <k_in*k_out>/<k_in>,}
 where \eqn{\beta} is the transmission coefficient among animals,
 \eqn{k_\mathrm{in/out}}{k_in/out} are the in/out-degrees of a node
-and the \eqn{\hat{\cdot}}{〈·〉} symbol represents the average value
+and the \eqn{<·>} symbol represents the average value
 across all nodes in the graph.
 
 The unweighted value computed above is most appropriate for a