---
title: Pattern.sampleModels()
---
The `Pattern.sampleModels()` method will _sample_ the pattern which means
to draft multiple variants of the same pattern, and stack them on
top of each other.
In this particular case, it will draft a variants for each of the models you pass it.
:::tip
The goal of model sampling is to verify that a pattern grades correctly up and down as sizes change.
:::
:::noteThis method is chainable as it returns the Pattern object:::
## Pattern.sampleModels() signature
```js
Pattern pattern.sampleModels(object models, string focus)
```
The `models` object you pass as the first parameter should be structured as such:
```js
{
modelName1: {
measurement1: valueInMm,
measurement2: valueInMm,
// ...
},
modelName2: {
measurement1: valueInMm,
measurement2: valueInMm,
// ...
},
// ...
}
```
The (optional) string you can pass as the second parameter should hold the
key of one of the models in the first parameter. In our example above, it
could hold `modelName2` for example.
By passing this second parameter, you can put the _focus_ on one of the models,
which will influence the render style, and make it
easier to see a comparison between a given set of measurements, and the rest.
Alternatively, you can use the `Pattern.sample()` method and set `settings.sample.focus` to the key
identifying your model in the models object.
## Pattern.sampleModels() example
```js
import { Aaron } from "@freesewing/aaron"
const Aaron = new Aaron()
// Load some public test measurements from the FreeSewing backend
const measurements = (
await (
await fetch("https://backend3.freesewing.org/curated-sets/1.json")
).json()
).measurements
const svg = aaron.sampleModels(measurements, "34").render()
```
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