[R] Plotting numeric values against non numeric items

[lse1986]

Hi i want do a line graph.

My y axis contains numeric values. My x axis contains non numeric
statements.

This is what i want the graph to look like.

When i try to plot this graph on R it comes up with the following error
message:

"Error in plot.window(...) : need finite 'xlim' values
In addition: Warning messages:
1: In xy.coords(x, y, xlabel, ylabel, log) : NAs introduced by coercion
2: In min(x) : no non-missing arguments to min; returning Inf
3: In max(x) : no non-missing arguments to max; returning -Inf"

Any help would be much appreciated. Thanks in advance.

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