# Readability: Harris-Jacobson indices

### Description

This is just a convenient wrapper function for `readability`

.

### Usage

1 2 3 4 5 | ```
harris.jacobson(txt.file, word.list, parameters = c(char = 6), hj1 = c(dword
= 0.094, asl = 0.168, const = 0.502), hj2 = c(dword = 0.14, asl = 0.153,
const = 0.56), hj3 = c(asl = 0.158, lword = 0.055, const = 0.355),
hj4 = c(dword = 0.07, asl = 0.125, lword = 0.037, const = 0.497),
hj5 = c(dword = 0.118, asl = 0.134, lword = 0.032, const = 0.424), ...)
``` |

### Arguments

`txt.file` |
Either an object of class |

`word.list` |
A vector or matrix (with exactly one column) which defines familiar words. For valid results the short Harris-Jacobson word list for grades 1 and 2 (english) should be used. |

`parameters` |
A numeric vector with named magic numbers, defining the relevant parameters for all formulas of the index. |

`hj1` |
A numeric vector with named magic numbers for the first of the formulas. |

`hj2` |
A numeric vector with named magic numbers for the second of the formulas. |

`hj3` |
A numeric vector with named magic numbers for the third of the formulas. |

`hj4` |
A numeric vector with named magic numbers for the fourth of the formulas. |

`hj5` |
A numeric vector with named magic numbers for the fifth of the formulas. |

`...` |
Further valid options for the main function,
see |

### Details

This function calculates the revised Harris-Jacobson readability formulas (1 to 5),
as described in their paper for the
18th Annual Meeting of the College Reading Association (Harris & Jacobson,
1974). In contrast to `readability`

,
which by default calculates all possible indices,
this function will only calculate the index values.

This formula doesn't need syllable count.

### Value

An object of class `kRp.readability-class`

.

### References

Harris, A.J. & Jacobson,
M.D. (1974). Revised Harris-Jacobson readability formulas. In *18th Annual Meeting of the College Reading Association*, Bethesda.

### Examples

1 2 3 4 | ```
## Not run:
harris.jacobson(tagged.text, word.list=harris.jacobson.wl)
## End(Not run)
``` |

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