Description Usage Arguments Value Note Author(s) See Also Examples

This method allows computation of a truncated principal components analysis of a `matter_mat`

matrix using the implicitly restarted Lanczos method `irlba`

.

1 2 |

`x` |
A |

`n` |
The number of principal componenets to return, must be less than |

`retx` |
A logical value indicating whether the rotated variables should be returned. |

`center` |
A logical value indicating whether the variables should be shifted to be zero-centered, or a centering vector of length equal to the number of columns of |

`scale.` |
A logical value indicating whether the variables should be scaled to have unit variance, or a scaling vector of length equal to the number of columns of |

`...` |
Additional options passed to |

An object of class ‘prcomp’. See `?prcomp`

for details.

The 'tol' truncation argument found in the default `prcomp`

method is not supported. In place of the truncation tolerance in the original function, the argument `n`

explicitly gives the number of principal components to return. A warning is generated if the argument 'tol' is used.

Kylie A. Bemis

1 2 3 4 5 |

```
Loading required package: biglm
Loading required package: DBI
Attaching package: 'matter'
The following objects are masked from 'package:base':
apply, scale
Standard deviations (1, .., p=3):
[1] 1.269363 1.246694 1.187657
Rotation (n x k) = (10 x 3):
PC1 PC2 PC3
[1,] 0.22358717 -0.04384519 -0.03465806
[2,] 0.18511020 0.01905189 -0.02862531
[3,] -0.11992159 0.14134479 -0.54592323
[4,] 0.02046621 -0.40902231 -0.23137567
[5,] 0.72081289 0.07545634 -0.45209190
[6,] -0.23548406 -0.04338255 -0.09948186
[7,] 0.26021110 0.26169750 0.15836329
[8,] 0.49579071 -0.03016529 0.46863222
[9,] 0.10598111 -0.62346748 -0.28297706
[10,] 0.03418671 -0.58715764 0.32765486
```

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