Which of the following sort a dataframe by the order of the elements in B?

R - Quiz(MCQ)

x[rev(x$B),]

x[order(x$B),]

x[ordersort(x$B),]

x[rev(order(x$B)),]

Correct Answer : x[rev(order(x$B)),]

Explanation : x[rev(order(x$B)),] sort the dataframe in reverse order.

Recently Updated in R Questions

_____ is simplest class of analytics.

Predictive

Prescriptive

Summarization

Descriptive

Correct Answer : Descriptive

Explanation : Descriptive is the simplest class of analytics. Predictive analytics can only forecast what might happen in the future because all predictive analytics are probabilistic in nature.

Which of the following involves predicting a categorical response?

Classification

Clustering

Regression

Summarization

Correct Answer : Classification

Explanation : Classification techniques are widely used in data mining to classify data.

________ is proprietary tool for predictive analytics.

EDR

SAS

SSAS

Correct Answer : SAS

Explanation : SAS (Statistical Analysis System) is a software suite developed by SAS Institute for advanced analytics.

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Machine Learning

Artificial Intelligence