mhchart | R Documentation |

To compare the maternity histories among several human populations, this kind of graph is useful, inspired by Wood JW (1994) "Dynamics of Human Reproduction", Aldine de Gruyter, New York.

`mhchart(LIST, XLIM=c(15,45), COL="black", FILL="white", BWD=1, ...)`

`LIST` |
The list of groups with their maternity histories from first birth to the last birth. Usually the first childbirth age is estimated as median by Kaplan-Meier method, the second childbirth age was given by adding the median of first birth intervals to the first childbirth age by Kaplan-Meier method, and so on. |

`XLIM` |
The limit of x axis, which means the range of reproductive ages. Default is 15 and 45. |

`COL` |
The border color. Default is black. |

`FILL` |
The painting color. Default is white. |

`BWD` |
The line width of the boxes. Default is 1. |

`...` |
Other parameters handed to barplot() to draw axes and background. |

No value is returned.

Minato Nakazawa minatonakazawa@gmail.com https://minato.sip21c.org/

```
Developing <- c(18, 21, 24, 27, 30, 33.5, 37)
Hutterite <- c(23, 25, 27, 29, 31, 33, 35, 37, 39)
Gainj <- c(27, 31, 35, 39)
Japan <- c(29, 34)
x <- list(
Developing=Developing,
Hutterite=Hutterite,
Gainj=Gainj,
Japan=Japan)
mhchart(rev(x), COL="blue", FILL="pink", BWD=2, XLIM=c(15, 45),
main="Maternity histories for selected populations",
xlab="Maternal age (years)")
```

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