r - Save gvis Object as png image -


i wanted save gvis object .png file

gauge <-  gvisgauge(citypopularity, options=list(min=0, max=800, greenfrom=500, greento=800, yellowfrom=300, yellowto=500, redfrom=0, redto=300, width=400, height=300)) plot(gauge)  print(gauge, tag="chart", file="gauge.html")

i can save them .html file - need them saved .png file. how can save charts produced googlevis image (.png). wanted inside r.


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