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When trying to fit a Random Forest Regressor model with y data that looks like this:

[  0.00000000e+00   1.36094276e+02   4.46608221e+03   8.72660888e+03

   1.31375786e+04   1.73580193e+04   2.29420671e+04   3.12216341e+04

   4.11395711e+04   5.07972062e+04   6.14904935e+04   7.34275322e+04

   7.87333933e+04   8.46302456e+04   9.71074959e+04   1.07146672e+05

   1.17187952e+05   1.26953374e+05   1.37736003e+05   1.47239359e+05

   1.53943242e+05   1.78806710e+05   1.92657725e+05   2.08912711e+05

   2.22855152e+05   2.34532982e+05   2.41391255e+05   2.48699216e+05

   2.62421197e+05   2.79544300e+05   2.95550971e+05   3.13524275e+05

   3.23365158e+05   3.24069067e+05   3.24472999e+05   3.24804951e+05

And X data that looks like this:

[ 735233.27082176  735234.27082176  735235.27082176  735236.27082176

  735237.27082176  735238.27082176  735239.27082176  735240.27082176

  735241.27082176  735242.27082176  735243.27082176  735244.27082176

  735245.27082176  735246.27082176  735247.27082176  735248.27082176

With the following code:

regressor = RandomForestRegressor(n_estimators=150, min_samples_split=1)

rgr =,y) 

I get this error:

ValueError: Number of labels=600 does not match number of samples=1

I assume one of my sets of values is in the wrong format but its not too clear to me from the documentation.

1 Answer

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by (33.1k points)

The shape of X should be [n_samples, n_features], you can transform X by

X = X[:, None]

Hope this answer helps you!

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