Converting DataArray into numpy array

Question

I have a DataArray that I want to convert to a numpy array. For reference it's a three dimensional gridded dataset containing (time, latitude, longitude). I have tried using xarray.DataArray.values(), but receive the error: TypeError: 'property' object is not callable.

I want to transform it into a numpy array as I'm using a function that utilizes the reshape capabilities and won't work properly with the DataArray. I've tried simply converting it to a numpy array using np.array(), but it converts every value into a NaN.

datatlt=xr.open_dataset("/nfs/home11/staff/lzhou/Public/Satellite_data/RSS_Tb_Anom_Maps_ch_TLT_V4_0.nc", decode_times=False)

tlt=datatlt['brightness_temperature'].sel(months=slice(121,492))
tlt2=np.ma.masked_invalid(tlt)

tlt2=xr.DataArray.values(tlt2)

Please edit your question to mention what kind of data is present in your data array -- are they integers or floats? What is minimum possible value and maximum possible value? If floats, can they be represented in 32-bit floats? Before creating a numpy array, you need to decide upon a suitable numpy dtype for each element, and that would depend upon details such as what I just mentioned — fountainhead
– fountainhead, Commented Mar 13, 2019 at 0:24
Did you try xarray.DataArray.values? The error means you can't use () after values because it isn't callable (it isn't a function). What is the type of that values object? Is it an array? If so, what shape and dtype? — hpaulj
– hpaulj, Commented Mar 13, 2019 at 0:42

jhamman · Accepted Answer · 2019-03-13 06:59:15Z

5

DataArray.values is a property. Properties are not callable. Instead, you just access the numpy array as if it were an attribute of the DataArray.

tlt2 = tlt.values

If you want a masked array, you'll want to call the to_masked_array method:

tlt2 = tlt.to_masked_array()

answered Mar 13, 2019 at 6:59

jhamman

6,5441 gold badge26 silver badges44 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Converting DataArray into numpy array

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related