title: Rcpp::not_compatible when fitting RBF
body: <p>I am attempting to fit an RBF network using the RSNNS package,
  this is my code:</p>
  
  <pre><code>library(Rcpp)
  library(RSNNS)
  library(mlbench)
  data("BreastCancer")
  BreastWithoutNA&lt;- na.omit(BreastCancer)
  inputs &lt;- BreastWithoutNA[, 2:10]
  outputs &lt;- decodeClassLabels(BreastWithoutNA[,11],valTrue = 0.9,valFalse = 0.1)
  
  
  model &lt;- rbf(inputs, outputs, size=40, maxit=1000,
               initFuncParams=c(0, 1, 0, 0.01, 0.01),
               learnFuncParams=c(1e-8, 0, 1e-8, 0.1, 0.8), linOut=TRUE)
  </code></pre>
  
  <p>when I run the line:</p>
  
  <pre><code>model &lt;- rbf(inputs, outputs, size=40, maxit=1000,
            initFuncParams=c(0, 1, 0, 0.01, 0.01),
            learnFuncParams=c(1e-8, 0, 1e-8, 0.1, 0.8), linOut=TRUE)
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>terminate called after throwing an instance of 'Rcpp::not_compatible'
  what():  not compatible with requested type
  
  This application has requested the Runtime to terminate it in an unusual way.
  Please contact the application's support team for more information.
  </code></pre>
  
  <p>could anyone help me,please?
  regards,</p>