Clustering data into specific range

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Hi,

I have a wind speed data that contain information of Latitude:Longitude:Wind speed, of a specific area. Right now, I want to classify the wind speed value into 3 clasess which are low, medium and high.

This is my data example

Latitude Longitude Wind speed

0.0000000e+00 9.5000000e+01 3.6036667e+00

0.0000000e+00 9.5250000e+01 3.5781667e+00

0.0000000e+00 9.5500000e+01 3.5515000e+00

0.0000000e+00 9.5750000e+01 3.5359167e+00

0.0000000e+00 9.6000000e+01 3.5348333e+00

0.0000000e+00 9.6250000e+01 3.5368333e+00

0.0000000e+00 9.6500000e+01 3.5077500e+00

0.0000000e+00 9.6750000e+01 3.4358333e+00

0.0000000e+00 9.7000000e+01 3.3370000e+00

0.0000000e+00 9.7250000e+01 3.2308333e+00

0.0000000e+00 9.7500000e+01 3.1323333e+00

0.0000000e+00 9.7750000e+01 3.0404167e+00

0.0000000e+00 9.8000000e+01 2.9537500e+00

0.0000000e+00 9.8250000e+01 2.8655833e+00

0.0000000e+00 9.8500000e+01 2.7736667e+00

0.0000000e+00 9.8750000e+01 2.6754167e+00

0.0000000e+00 9.9000000e+01 2.5668333e+00

0.0000000e+00 9.9250000e+01 2.4494167e+00

0.0000000e+00 9.9500000e+01 2.3389167e+00

I want to classify the data into low wind speed (0-1.9 m/s), medium wind speed (2-4.9 m/s) and high wind speed (5-9 m/s). Can anybody share to me and help me to find solution for my problem ?.