---
title: logarithmicBins() function
description: >
  `logarithmicBins()` generates a list of exponentially separated float values.
menu:
  flux_v0_ref:
    name: logarithmicBins
    parent: universe
    identifier: universe/logarithmicBins
weight: 101

introduced: 0.19.0
---

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`logarithmicBins()` generates a list of exponentially separated float values.

Use `linearBins()` to generate bin bounds for `histogram()`.

##### Function type signature

```js
(count: int, factor: float, start: float, ?infinity: bool) => [float]
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### start
({{< req >}})
First value to return in the list.



### factor
({{< req >}})
Multiplier to apply to subsequent values.



### count
({{< req >}})
Number of values to return.



### infinity

Include an infinite value at the end of the list. Default is `true`.




## Examples

### Generate a list of exponentially increasing values

```js
logarithmicBins(
    start: 1.0,
    factor: 2.0,
    count: 10,
    infinity: true,
)// Returns [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, +Inf]


```