我有以下代码来创建一个plot
。 在x
-和y-axes
有symbols
出现在屏幕上,在JPEG
,当我救我的情节以这种格式,而不是当我保存的情节为PDF
。
是否有替代符号我\u2030
将在我的PDF或其他解决我的问题打印? 请参阅下面的正确(JPEG格式)的例子和不正确的(PDF)地块。
plot(c(-1,1), c(-1,1), bty = "n", type= "n", las = 1, cex.lab = 1.5, cex.axis = 1.25, main = NULL,
ylab=expression(paste("Correlation Coefficient (r) for ", delta ^{15},"N"," \u0028","\u2030","\u0029")),
xlab=expression(paste("Correlation Coefficient (r) for ", delta ^{13},"C"," \u0028","\u2030","\u0029")))
axis(1, at = seq(-1.0, 1.0, by = 0.1), labels = F, pos = 0, cex.axis = 0.05, tcl = 0.25)
axis(2, at = seq(-1.0, 1.0, by = 0.1), labels = F, pos = 0, cex.axis = 0.05, tcl = 0.25)