Bar chart shrink to a line when there is only one bar

Dash Python
1

Hello everyone!
I’ve got a bar chart with tick0 and range of week.
When there is only one bar it shrinks to a line like this:

image
image1920×530 61.5 KB

(On 01/11)
Any ideas?

2

Hello @Karnishitrit,

Could you please provide an MRE of what you have?

It’s hard to say without seeing your data and code.

3

Hi @jinnyzor
My code is on another network so I can’t give a mre

4

@AIMPED,

Any thoughts on this?

@Karnishitrit,

Which bar chart are you using? PX or GO?

5

Hi!

This usually happens, if the x-range is quite large, this would be my guess.

An example with 700 days on the x- axis- there is literally no space to draw the columns much wider.

import pandas as pd
import plotly.express as px

# create data
week = pd.date_range('01/01/2022', periods=700, freq='D')
value = [0 for _ in range(700)]
value[155] = 60

# create DataFrame
df  = pd.DataFrame({'date': week, 'value': value})

# create figure
fig = px.bar(df, x='date', y='value')

fig.show()

which creates:

newplot (15)
newplot (15)1473×360 10.8 KB

EDIT:

If you change the axis range to one week you get this:

fig.update_xaxes({'range':[df.date.iloc[154], df.date.iloc[161]]})

newplot (16)
newplot (16)1473×360 10 KB

1 Like
6

It’s go @jinnyzor

7

I have only 7 days on the x-axis (of the last week)
And one bar in it

8

Hi @Karnishitrit

Are you sure, that the x-axis are actually days? What does your data look like? What happens, if you create dummy values for the rest of the days, how does it look like then?

Did you try running my example on your system? Does it look like the images I attached here?

Without more information and the code which creates your figure it will be difficult to help you, I guess.