Hello, I am very new in R so I am so sorry for this question.
  I have the Barro-Lee data set which contains 98 countries and I want to run the regressions only for the Latin America countries, so what do you recomend? How can I delete all the other countries or how can I select the countries of Lat. Am. thank you
   
  this is the list of countries
  SHCODE     COUNTRY  NAME           WBCTRY       (1)       (2)
_________________________________________________________________

  1        Algeria                  DZA          +         +
  2        Angola                   AGO          -         -
  3        Benin                    BEN          -         +
  4        Botswana                 BWA          +         +
  5        Burkina Faso             HVO          -         -
  6        Burundi                  BDI          +         -
  7        Cameroon                 CMR          +         +
  8        Cape verde               CPV          -         -
  9        Central African Rep.     CAF          +         +
 10        Chad                     TCD          -         -
 11        Comoros                  COM          -         -
 12        Congo                    COG          -         +
 13        Egypt                    EGY          +         +
 14        Ethiopia                 ETH          +         -
 15        Gabon                    GAB          +         -
 16        Gambia                   GMB          -         +
 17        Ghana                    GHA          +         +
 18        Guinea                   GIN          -         -
 19        Guinea-Bissau            GNB          -         -
 20        Cote d'Ivoire            CIV          +         -
 21        Kenya                    KEN          +         +
 22        Lesotho                  LSO          -         +
 23        Liberia                  LBR          +         +
 24        Madagascar               MDG          +         -
 25        Malawi                   MWI          +         +
 26        Mali                     MLI          -         +
 27        Mauritania               MRT          -         -
 28        Mauritius                MUS          +         +
 29        Morocco                  MAR          +         -
 30        Mozambique               MOZ          -         -
 31        Niger                    NER          -         +
 32        Nigeria                  NGA          +         -
 33        Rwanda                   RWA          +         +
 34        Senegal                  SEN          +         +
 35        Seychelles               SYC          -         -
 36        Sierra Leone             SLE          +         +
 37        Somalia                  SOM          -         -
 38        South africa             ZAF          +         +
 39        Sudan                    SDN          +         +
 40        Swaziland                SWZ          +         +
 41        Tanzania                 TZA          +         +
 42        Togo                     TGO          +         +
 43        Tunisia                  TUN          +         +
 44        Uganda                   UGA          +         +
 45        Zaire                    ZAR          +         +
 46        Zambia                   ZMB          +         +
 47        Zimbabwe                 ZWE          +         +
 48        Bahamas, The             BHS          -         -
 49        Barbados                 BRB          +         +
 50        Canada                   CAN          +         +
 51        Costa Rica               CRI          +         +
 52        Dominica                 DMA          -         -
 53        Dominican Rep.           DOM          +         +
 54        El Salvador              SLV          +         +
 55        Grenada                  GRD          -         -
 56        Guatemala                GTM          +         +
 57        Haiti                    HTI          +         +
 58        Honduras                 HND          +         +
 59        Jamaica                  JAM          +         +
 60        Mexico                   MEX          +         +
 61        Nicaragua                NIC          +         +
 62        Panama                   PAN          +         +
 63        St.Lucia                 LCA          -         -
 64        St.Vincent & Grens.      VCT          -         -
 65        Trinidad & Tobago        TTO          +         +
 66        United States            USA          +         +
 67        Argentina                ARG          +         +
 68        Bolivia                  BOL          +         +
 69        Brazil                   BRA          +         +
 70        Chile                    CHL          +         +
 71        Colombia                 COL          +         +
 72        Ecuador                  ECU          +         +
 73        Guyana                   GUY          +         +
 74        Paraguay                 PRY          +         +
 75        Peru                     PER          +         +
 76        Suriname                 SUR          -         -
 77        Uruguay                  URY          +         +
 78        Venezuela                VEN          +         +
 79        Afghanistan              AFG          -         -
 80        Bahrain                  BHR          -         -
 81        Bangladesh               BGD          +         +
 82        Myanmar (Burma)          BUR          +         -
 83        China                    CHN          -         -
 84        Hong Kong                HKG          +         +
 85        India                    IND          +         +
 86        Indonesia                IDN          +         +
 87        Iran, I.R. of            IRN          -         +
 88        Iraq                     IRQ          +         +
 89        Israel                   ISR          +         +
 90        Japan                    JPN          +         +
 91        Jordan                   JOR          +         +
 92        Korea                    KOR          +         +
 93        Kuwait                   KWT          -         -
 94        Malaysia                 MYS          +         +
 95        Nepal                    NPL          +         +
 96        Oman                     OMN          -         -
 97        Pakistan                 PAK          +         +
 98        Philippines              PHL          +         +
 99        Saudi Arabia             SAU          -         -
100        Singapore                SGP          +         +
101        Sri Lanka                LKA          +         +
102        Syria                    SYR          -         +
103        Taiwan                   OAN          +         +
104        Thailand                 THA          +         +
105        United Arab Emirates     ARE          -         -
106        Yemen, N.Arab            YEM          -         +
107        Austria                  AUT          +         +
108        Belgium                  BEL          +         +
109        Cyprus                   CYP          +         +
110        Denmark                  DNK          +         +
111        Finland                  FIN          +         +
112        France                   FRA          +         +
113        Germany, West            DEU          +         +
114        Greece                   GRC          +         +
115        Hungary                  HUN          -         -
116        Iceland                  ISL          +         -
117        Ireland                  IRL          +         +
118        Italy                    ITA          +         +
119        Luxembourg               LUX          +         -
120        Malta                    MLT          +         +
121        Netherlands              NLD          +         +
122        Norway                   NOR          +         +
123        Poland                   POL          -         -
124        Portugal                 PRT          +         +
125        Spain                    ESP          +         +
126        Sweden                   SWE          +         +
127        Switzerland              CHE          +         +
128        Turkey                   TUR          +         +
129        United Kingdom           GBR          +         +
130        Yugoslavia               YUG          -         +
131        Australia                AUS          +         +
132        Fiji                     FJI          +         -
133        New Zealand              NZL          +         +
134        Papua New Guinea         PNG          +         +
135        Solomon Islands          SLB          -         -
136        Tonga                    TON          -         -
137        Vanuatu                  VUT          -         -
138        Western Samoa            WSM          -         -
   

 		
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 Preguntá. Respondé. Descubrí.
 Todo lo que querías saber, y lo que ni imaginabas,

 Probalo ya! 
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