Construct histogram

head(blood)

pat , bidil race bf1 bf 2
1 1 0 1 286 279
2 2 1 1 262 259
3 3 0 1 275 278
4 4 0 1 262 262
5 5 0 1 271 276
6 6 1 1 309 293

Please take a look at the homework policy and then modify your question. Showing what you have tried and what, specifically, you are stuck on would be very helpful.

FAQ: Homework Policy

try ?hist in the R console

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