[R] How to plot multiple variables on the same graph

[Rafael Barros de Rezende]

   How to plot multiple variables on the same graph

   Dear R users,

   I want to plot the following variables (a, b, c) on the same graph. The
   x-axis must be the variable mat and the graph must have the type = "l". How
   can I do that??

   > a
    [1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
   > b
    [1] 0.90665296 0.82473871 0.75269217 0.68917606 0.63304639 0.58332339
    [7] 0.53916690 0.49985555 0.46476916 0.37987824 0.30067069 0.20731536
   [13] 0.13927000 0.10452521 0.08362549
   > c
    [1] 0.08734889 0.15347956 0.20272682 0.23858721 0.26387711 0.28086150
    [7] 0.29135865 0.29682524 0.29842560 0.28839505 0.25944938 0.19894618
   [13] 0.13850436 0.10445517 0.08361908
   > mat
    [1]  1  2  3  4  5  6  7  8  9 12 16 24 36 48 60

   Thanks!!
   Rafael Barros de Rezende
   MPhill Economics Candidate - Curriculum Lattes:
   [1]http://lattes.cnpq.br/9826095609825249
   Cedeplar - Development and Regional Planning Center
   Face, UFMG ([2]http://www.cedeplar.ufmg.br)
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References

   1. http://lattes.cnpq.br/9826095609825249
   2. http://www.cedeplar.ufmg.br/