# Numpy image – rotate matrix 270 degrees

## Question:

I’ve got a Numpy 2d array that represents a grey-scale image and I need to rotate it 270 degrees. Might be being a bit thick here but the two ways I can find to do this seem quite… circulous:

```
rotated = numpy.rot90(numpy.rot90(numpy.rot90(orignumpyarray)))
rotated = numpy.fliplr(numpy.flipud(numpy.rot90(orignumpyarray)))
```

I’m thinking there must be a better way to do this in one operation. Basically a rot270() function? Any ideas?

## Answers:

You can tell `rot90`

to rotate several times, this should work:

```
rotated = numpy.rot90(orignumpyarray,3)
```

```
rotated_array =numpy.rot90(orignumpyarray,3)
```

Explanation of the function:

**numpy.rot90(a,b)**

**a =** Array which you want to rotate

**b =** How many times you want to rotate it by 90 degrees. For here you want 270° so

90° * 3 = 270° that is why b = 3 here.