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Oct 31, 2019
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add a descending by value bar chart example #160

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7e15fdf
add a descending by value bar chart example
chriddyp Oct 30, 2019
8390f25
consistency
chriddyp Oct 30, 2019
73fb620
use "bar chart" instead of "bars" for better seo
chriddyp Oct 30, 2019
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26 changes: 21 additions & 5 deletions python/bar-charts.md
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Expand Up @@ -329,13 +329,15 @@ fig.show()

### Bar Chart with Sorted or Ordered Categories

Set `categoryorder` to "category ascending/descending" for the alphanumerical order of the category names or "total ascending/descending" for numerical order of values. [categoryorder](https://plot.ly/python/reference/#layout-xaxis-categoryorder) for more information.
Set `categoryorder` to `"category ascending"` or `"category descending"` for the alphanumerical order of the category names or `"total ascending"` or `"total descending"` for numerical order of values. [categoryorder](https://plot.ly/python/reference/#layout-xaxis-categoryorder) for more information. Note that sorting the bars by a particular trace isn't possible right now - it's only possible to sort by the total values. Of course, you can always sort your data _before_ plotting it if you need more customization.

This example orders the bar chart alphabetically with `categoryorder: 'category ascending'`

```python
import plotly.graph_objects as go

x=['a','b','c','d']
fig = go.Figure(go.Bar(x =x, y=[2,5,1,9], name='Montreal'))
x=['b', 'a', 'c', 'd']
fig = go.Figure(go.Bar(x=x, y=[2,5,1,9], name='Montreal'))
fig.add_trace(go.Bar(x=x, y=[1, 4, 9, 16], name='Ottawa'))
fig.add_trace(go.Bar(x=x, y=[6, 8, 4.5, 8], name='Toronto'))

Expand All @@ -348,15 +350,29 @@ This example shows how to customise sort ordering by defining `categoryorder` to
```python
import plotly.graph_objects as go

x=['a','b','c','d']
fig = go.Figure(go.Bar(x =x, y=[2,5,1,9], name='Montreal'))
x=['b', 'a', 'c', 'd']
fig = go.Figure(go.Bar(x=x, y=[2,5,1,9], name='Montreal'))
fig.add_trace(go.Bar(x=x, y=[1, 4, 9, 16], name='Ottawa'))
fig.add_trace(go.Bar(x=x, y=[6, 8, 4.5, 8], name='Toronto'))

fig.update_layout(barmode='stack', xaxis={'categoryorder':'array', 'categoryarray':['d','a','c','b']})
fig.show()
```

This example orders the bar chart by descending value with `categoryorder: 'total descending'`

```python
import plotly.graph_objects as go

x=['b', 'a', 'c', 'd']
fig = go.Figure(go.Bar(x=x, y=[2,5,1,9], name='Montreal'))
fig.add_trace(go.Bar(x=x, y=[1, 4, 9, 16], name='Ottawa'))
fig.add_trace(go.Bar(x=x, y=[6, 8, 4.5, 8], name='Toronto'))

fig.update_layout(barmode='stack', xaxis={'categoryorder':'total descending'})
fig.show()
```

### Horizontal Bar Charts

See examples of horizontal bar charts [here](https://plot.ly/python/horizontal-bar-charts/).
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