resample_down {alkahest} | R Documentation |

## Downsample

### Description

Downsample

### Usage

```
resample_down(x, y, ...)
## S4 method for signature 'numeric,numeric'
resample_down(x, y, by)
## S4 method for signature 'ANY,missing'
resample_down(x, y, by)
```

### Arguments

`x` , `y` |
A |

`...` |
Currently not used. |

`by` |
An |

### Value

Returns a `list`

with two components `x`

and `y`

.

### Author(s)

N. Frerebeau

### See Also

Other resampling methods:
`resample_bin()`

,
`resample_interpolate()`

### Examples

```
## X-ray diffraction
data("XRD")
## Plot spectrum
plot(XRD, type = "l", xlab = expression(2*theta), ylab = "Count")
## Bin by 3
XRD_bin_mean <- resample_bin(XRD, by = 3, f = mean)
XRD_bin_min <- resample_bin(XRD, by = 3, f = min)
plot(XRD, type = "l", xlim = c(25, 35),
xlab = expression(2*theta), ylab = "Count")
lines(XRD_bin_mean, type = "l", col = "red")
lines(XRD_bin_min, type = "l", col = "green")
## Downsample by 10
XRD_down <- resample_down(XRD, by = 10)
plot(XRD, type = "l", xlim = c(20, 40),
xlab = expression(2*theta), ylab = "Count")
lines(XRD_down, type = "l", col = "red")
## Linearly interpolate
XRD_approx <- resample_interpolate(XRD, from = 20, to = 40, by = 0.02)
plot(XRD, type = "l", xlim = c(20, 40),
xlab = expression(2*theta), ylab = "Count")
lines(XRD_approx, type = "l", col = "red")
```

[Package

*alkahest*version 1.1.1 Index]