title: How to Abbreviate Number of Fields in RPART
body: <p>Please take a look at the following RPART code in R:</p>
  
  <pre><code>fit&lt;-rpart(SCR_ADULT_SILVER ~
    HCC1+HCC2+HCC3+HCC4+HCC5+HCC6+HCC7+HCC8+HCC9+HCC10+HCC11+HCC12+HCC13+HCC14+HCC15+HCC16+
    HCC17+HCC18+HCC19+HCC20+HCC21+HCC22+HCC23+HCC24+HCC25+HCC26+HCC27+HCC28+HCC29+HCC30+HCC31,
    method="anova",
    control=rpart.control(minsplit=210,cp=0.001,usesurrogate=0),
    data=Adult)
  </code></pre>
  
  <p>How may I specify all of the variables that begin with HCC are my variables of interest without spelling all of them out?</p>