## Question

Asked By – Sam Creamer

I’m using matplotlib to make a histogram.

Is there any way to manually set the size of the bins as opposed to the number of bins?

**Now we will see solution for issue: Bin size in Matplotlib (Histogram) **

## Answer

Actually, it’s quite easy: instead of the number of bins you can give a list with the bin boundaries. They can be unequally distributed, too:

```
plt.hist(data, bins=[0, 10, 20, 30, 40, 50, 100])
```

If you just want them equally distributed, you can simply use range:

```
plt.hist(data, bins=range(min(data), max(data) + binwidth, binwidth))
```

**Added to original answer**

The above line works for `data`

filled with integers only. As macrocosme points out, for floats you can use:

```
import numpy as np
plt.hist(data, bins=np.arange(min(data), max(data) + binwidth, binwidth))
```

This question is answered By – CodingCat

**This answer is collected from stackoverflow and reviewed by FixPython community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 **