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R Calculate the mean, median and IQR for sepal length for each species in the iris dataset using ...

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Calculate the mean, median and IQR for sepal length for each species in the iris dataset using plyr
functions. Do this in a single top-level call.

math   Statistics-And-Probability   
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Answer #1

>plyr-IRISI,1 > plyr [1 5.1 4.9 4.7 4.6 5.0 5.4 4.6 5.0 4.4 4.9 5.4 4.8 4.8 4.3 5.8 5.7 5.4 5.1 [191 5.7 5.1 5.4 5.1 4.6 5.1

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