r - Error in eval(expr, envir, enclos) (from unknown!7788Kmk#8) -

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error in eval(expr, envir, enclos) (from unknown!7788kmk#8)

im getting error:

error in eval(expr, envir, enclos) (from unknown!7788kmk#8) : object 'nickname' not found.

code

 |                            | nickname |   d7li |   x |  |----------------------------+----------+--------+-----|  | dd\_ol\_dhofar132b111@5012 | ol1a     |   24.2 |  48 |  | dd\_ol\_dhofar132b111@5013 | ol1a     |   22.5 |  91 |   # dataset       d7li.ol1a <- subset(tbl,subset=(nickname=="ol1a"))$d7li      x.ol1a    <- subset(tbl,subset=(nickname=="ol1a"))$x      xlim       <- c(0, 750)       ylim       <- c(-30, 30)       legend <- c( "dhofar132" )       col    <- c("red")       pch    <- c(16,17)      par(mar=c(2,2,0,0))      plot(1,0,type="n",xlim=xlim,ylim=ylim,log="x")     lines(d7li.ol1a , x.ol1a ,pch=pch[1],col=col[1])     legend("topleft",legend,pch=15,col=col)

the column "nickname" not exist in data.frame tbl. can find out column names using colnames(tbl). copy name exactly. lyzander mentioned, r case sensitive.

also, using:

d7li.ol1a <- subset(tbl,subset=(nickname=="ol1a"), select = "d7li")

this not better. way use subset.


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