# lets_plot.coord_fixed¶

lets_plot.coord_fixed(ratio=1.0, xlim=None, ylim=None, flip=False)

A fixed scale coordinate system forces a specified ratio between the physical representation of data units on the axes.

Parameters
ratiofloat

The ratio represents the number of units on the y-axis equivalent to one unit on the x-axis. ratio = 1, ensures that one unit on the x-axis is the same length as one unit on the y-axis. Ratios higher than one make units on the y-axis longer than units on the x-axis, and vice versa.

xlimlist

Limits (2 numbers) for the x axis. 1st element defines lower limit, 2nd element defines upper limit. None means no lower / upper bound - depending on the index in list.

ylimlist

Limits (2 numbers) for the y axis. 1st element defines lower limit, 2nd element defines upper limit. None means no lower / upper bound - depending on the index in list.

flipbool

Flips the coordinate system axisso that horizontal axis becomes vertical and vice versa.

Returns
FeatureSpec

Coordinate system specification.

Examples

```1import numpy as np
2from lets_plot import *
3LetsPlot.setup_html()
4n = 30
5np.random.seed(42)
6x = np.random.uniform(-1, 1, size=n)
7y = 25 * x ** 2 + np.random.normal(size=n)
8ggplot({'x': x, 'y': y}, aes(x='x', y='y')) + \
9    geom_point() + coord_fixed(ratio=.2, ylim=(7, 20))
```