> For the complete documentation index, see [llms.txt](https://docs.unblinked.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unblinked.com/analytics/create-chart/function/3.-how-to-visualize-data/line-and-bar-chart.md).

# Line & Bar Chart

Once you get to the visualization tab with the function code results, you can see the line & bar is activated by default. 

Each **series** corresponds to a function. For example, if you set 5 functions, then you will see 5 series of lines constitute a chart. The `X-axis` of the chart is **time** and the `Y-axis` is **value**(or any other column of which the values are the numbers).

{% hint style="warning" %}
Line & bar type assumes that every function result is a time-series with **time** and **value** columns only. If your function result has columns other than time and value, we advise you to use **table** type instead. 
{% endhint %}

***

## Series options

Series options are the configures applied to each function.

### Line or Bar

![](/files/D67Tl1B8MRTwkVGA3MLH)

You can choose to display each function as a chart, and you can choose the chart type (**line** or **bar**).

### Z-index

![](/files/715GY0R96GDRevhcJR2q)

You can choose the order of the chart displayed. The larger the z-index, the more forward the chart is displayed.

### Y-index

![](/files/30A9XRcnahe4o62MJwf1)

You can choose which Y-axis the function belongs to. The functions with the same Y-index will share the same Y-axis. This option is available only when [multiple Y-axis](#multiple-y-axis) option is activated. It can be chosen from 1 to 3.

***

## Common options

Common options are the options that affects the chart and every series.

### Line Stack

![](/files/5F5GQV7bgiu3lEwyOnSx)

Line stack is a chart setting that stacks multiple lines on top of each other. When line stack is turned on, all lines are stacked.

### Bar Stack

![](/files/0TnvXCKHFiQ8eiM7QIcJ)

Bar stack is a chart setting that allows you to stack multiple bars on top of each other. When bar stack is turned on, all bars are stacked.

### Multiple Y-axis

![](/files/wsDOYLFtdamZJYNcXpD0)

Multiple Y-axis is a chart setting that allows you to plot multiple Y-axes on the same chart. This is useful for comparing the values of different variables on the same scale.

### Hide Y-axis

![](/files/LesEbOeJWtGCfZAcROi4)

Hide Y-axis is a chart setting that allows you to hide one or more Y-axes on a chart. This is useful for when you only want to focus on a specific variable, or when you want to simplify the chart.

### Line Width

![](/files/xf9DdYH5URkNlJMYZASa)

You can adjust the width of the line chart.

### Bar Width

![](/files/tEzDTZV3s1UJa7xiblel)

You can adjust the width of the bar chart.