Does anybody know how to solve this error?
postscript(file= "file.ps", family = "Helvetica", font = "Helvetica")
plot.igraph(g, layout=layout.circle, vertex.label.font=2)
dev.off()
error in text.default(x, y, labels = labels, col = label.color, family
= label.family, :
family 'serif' not included in PostScript device
Regards Knut
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