[R] Put short string labels vertically near tick marks on bottom axis

[Hurr]

A month ago I was considering the forum topic
“Label axis tick marks with a simple function of axis value”
and haven’t had time to work much on it.
Since then I have written a little program that makes 
period labels for the frequency axis, but I don’t know how to attach them.
I expected the following code to work.
Later there will be more requirements like 
1) labels should be vertical
2) the bottom of the labels should line up with the ticks
3) requirements beyond today’s consideration

horAxisLims=c(0,7200)
verData=c(1,365,809,1252,1753,2191,2922,3409,3896,4383,4819,5255,5691,6128,6564,7000)
horData=c(1,300,800,1200,1700,2100,2900,3400,3800,4300,4800,5200,5600,6100,6500,7000)
#not at tics 
horTicLocs=c(1,365,809,1252,1753,2191,2922,3409,3896,4383,4819,5255,5691,6128,6564,7000)
horLabels=c(”1Yr”,”1Da”,”10.8Hr”,”7Hr”,”5Hr”,”4Hr”,”3Hr”,”2.57Hr”,”2.25Hr”,”2Hr”,”1.82Hr”,”1.67Hr”,”1.54Hr”,”1.43Hr”,”1.34Hr”,”1.25Hr”)
plot(horData, verData,xaxt='n',xlim= horAxisLims)
axis(1,tick=TRUE,at= horTicLocs, labels= horLabels) 




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