[R] Error: unexpected string constant

[paogeomat]

I want to analize some points location using the ppp, but i have this
problem:

Datos=read.table("puntos_texto.txt",dec=".",sep="\t",header=T)
> summary(Datos)
       id               y                 x          
 Min.   :   1.0   Min.   :1013581   Min.   :1177842  
 1st Qu.: 821.2   1st Qu.:1014442   1st Qu.:1179658  
 Median :1641.5   Median :1014455   Median :1179670  
 Mean   :1641.8   Mean   :1014465   Mean   :1179652  
 3rd Qu.:2462.8   3rd Qu.:1014473   3rd Qu.:1179680  
 Max.   :3283.0   Max.   :1015575   Max.   :1180213  
> danta=ppp(Datos$x,Datos$y,c(min(Datos$x)1177842,max(Datos$x)1180213),c(min(Datos$y)1013581,max(Datos$y)1015575))
Error: inesperado constante numérica en
"danta=ppp(Datos$x,Datos$y,c(min(Datos$x)1177842"
> danta=ppp(Datos$x,Datos$y,c(min(Datos$x)"1177842",max(Datos$x)"1180213"),c(min(Datos$y)"1013581",max(Datos$y)"1015575"))
Error: inesperado string constante en
"danta=ppp(Datos$x,Datos$y,c(min(Datos$x)"1177842""

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