summarySE | R Documentation |

Gives count, mean, standard deviation, standard error of the mean, and confidence interval (default 95%).

summarySE(data = NULL, measurevar, groupvars = NULL, na.rm = FALSE, conf.interval = 0.95, .drop = TRUE)

`data` |
a data frame |

`measurevar` |
the name of a column that contains the variable to be summariezed |

`groupvars` |
a vector containing names of columns that contain grouping variables |

`na.rm` |
a boolean that indicates whether to ignore NA's |

`conf.interval` |
the percent range of the confidence interval (default is 95%) |

`.drop` |
should combinations of variables that do not appear in the input data be preserved (FALSE) or dropped (TRUE, default) |

a data frame with count, mean, standard deviation, standard error of the mean, and confidence interval (default 95%).

http://www.cookbook-r.com/Graphs/Plotting_means_and_error_bars_(ggplot2)

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