Estimados usuarios de R:

Soy nuevo en R, le ruego disculpa por mi *Ignorancia*.

Estoy corriendo la siguiente instruccion,

ggsave(paste('img/',plotName,'.png', sep='')


 y   resulta el error:

ggsave(paste('img/',plotName,'.png', sep='')


Saving 7.32 x 4.87 in image

Error in grDevices::png(..., width = width, height = height, res = dpi,  :
  unable to start png() deviceIn addition: Warning messages:1: In
grDevices::png(..., width = width, height = height, res = dpi,  :
  unable to open file 'img/StreetRobberyKde2d.png' for writing2: In
grDevices::png(..., width = width, height = height, res = dpi,  :
  opening device failed



Estoy corriendo el código de aqui:

http://www.r-bloggers.com/visualizing-baltimore-2-vacant-property-and-some-more-crime/

ing 7.32 x 4.87 in image Error in grDevices::png(..., width = width, height
= height, res = dpi, : unable to start png() device In addition: Warning
messages: 1: In grDevices::png(..., width = width, height = height, res =
dpi, : unable to open file 'img/BurglaryKde2d.png' for writing 2: In
grDevices::png(..., width = width, height = height, res = dpi, : opening
device failed


Por favor, agradezco ayuda.



PD: Tengo Windows 7, 32 bits; vesion R 3.0.1



Saludos,

linis.

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