rmarkdown中scatter3D画图太大

如果在rmarkdown中使用scatter3D画图过大，可以考虑调整画布大小或者调整点的大小。可以尝试使用`width`和`height`参数来调整画布大小，例如：

scatter3D(x = x, y = y, z = z, colvar = colvar, pch = 16,
          type = "h", main = "Scatterplot Matrix",
          xlab = "x", ylab = "y", zlab = "z",
          xlim = c(-10, 10), ylim = c(-10, 10), zlim = c(-10, 10),
          phi = 20, theta = -40, bty = "g",
          size = 0.7, cex = 1.2, ticktype = "detailed",
          width = 800, height = 600)

如果调整画布大小仍然不能解决问题，可以尝试调整点的大小。可以使用`size`参数来调整点的大小，例如：

scatter3D(x = x, y = y, z = z, colvar = colvar, pch = 16,
          type = "h", main = "Scatterplot Matrix",
          xlab = "x", ylab = "y", zlab = "z",
          xlim = c(-10, 10), ylim = c(-10, 10), zlim = c(-10, 10),
          phi = 20, theta = -40, bty = "g",
          size = 0.2, cex = 1.2, ticktype = "detailed",
          width = 800, height = 600)

调整点的大小可以使图形更紧凑，从而减小图形的大小。