On 17 Mar 2016, at 14:27 , ALBERTO VIEIRA FERREIRA MONTEIRO
<[email protected]> wrote:
> Peter Dalgaard wrote:
>
>> I don't think so. I'll give you that it should either be the (number of
>> lines - 1)*spacing
>> or (number of linefeeds)*spacing, but it's correct to count the height of
>> "M" only on the top line.
>>
>> -pd
>>
>> It is correct as written
>>
> Ah, ok, I see now. The "line spacing" is not the line spacing, but the
> inter-line spacing plus
> the height of "M":
>
> "Note that the ‘height’ of a string is determined only by the number of
> linefeeds ("\n") it contains: it is the (number of linefeeds - 1) times the
> line spacing plus the height of "M" in the selected font. For an expression
> it is the height of the bounding box as computed by plotmath. Thus in both
> cases it is an estimate of how far above the final baseline the typeset
> object extends. (It may also extend below the baseline.) The inter-line
> spacing is controlled by cex, par("lheight") and the ‘point size’ (but not
> the actual font in use)"
>
> It's still confusing... Specially since there's no way to get the inter-line
> spacing except by running
>
> strheight("M\nM") - 2 * strheight("M")
>
> Alberto Monteiro
>
>
You still don't get it. It goes like this:
> strheight("M\nM") - strheight("M")
[1] 0.06733925
>
> (strheight("M\nM\nM") - strheight("M"))/2
[1] 0.06733925
>
> (strheight("M\nM\nM\nM") - strheight("M"))/3
[1] 0.06733925
which appears to be identical to par("cxy")[2].
--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: [email protected] Priv: [email protected]
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