text: /**
   * Copyright 2021 The Google Earth Engine Community Authors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  // [START earthengine__apidocs__ee_featurecollection_aggregate_sample_var]
  // FeatureCollection of power plants in Belgium.
  var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
               .filter('country_lg == "Belgium"');
  
  print('Sample variance of power plant capacities (MW)',
        fc.aggregate_sample_var('capacitymw'));  // 217604.420018647
  // [END earthengine__apidocs__ee_featurecollection_aggregate_sample_var]
  