[R] Conditional plot

[mnstn]

Hello All,
I have the following data set:
> all                                               
           [,1]      [,2]                           
 [1,] 297.04115 286.34645                           
 [2,] 303.94056 270.81590                           
 [3,] 297.87190 290.48009
 [4,] 305.81938 304.26238
 [5,] 294.92061  92.14025
 [6,]  72.09721 304.83084
 [7,]  66.53062 279.65700
 [8,] 218.46609 318.90179
 [9,] 306.55251 295.80110
[10,] 278.48156 269.71947
[11,] 201.24514 277.66272
[12,] 303.93334 296.89303
[13,] 295.89849  81.98786
[14,]  46.82938  74.70764

I would like to plot(all[,1],all[,2]) when all[,2]>200. The answer, I am
guessing, is embarrassingly simple but I simply cannot figure it out. Please
help me. 
Thanks.
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