[R] triangles point left, filled?

[Martin Ivanov]

 Dear R users,

I want to plot not only triangles point up and triangles point down,
which is easy using the "pch" argument to "points". I want to plot left and right pointing triangles as well. They must be fillable with colour.

I browsed a little in the documentation, tried rotating the up and down pointing triangles, but of no avail. Any suggestions will be appreciated.

Regards,
Martin Ivanov

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