Find anomalies in adgroupd (AdWords) http://www.freeadwordsscripts.com/2013/06/finding-anomalies-in-your-adgroups.html

anomalies.js

/**************************************
* Find the Anomalies
* Created By: Russ Savage
* Version: 1.2
* Changelog v1.2
*  - Fixed divide by 0 errors
*  - Changed SIG_FIGS to DECIMAL_PLACES
* Changelog v1.1
*  - Added ability to tag ad anomalies as well
* FreeAdWordsScripts.com
**************************************/
var DATE_RANGE = 'LAST_30_DAYS';
var DECIMAL_PLACES = 3;
var STANDARD_DEVIATIONS = 2;
var TO = ['you@your_domain.com'];
  
function main() {
  // This will add labels to and send emails about adgroups, keywords and ads. Remove any if you like.
  var levels_to_tag = ['adgroup','keyword','ad'];
  for(var x in levels_to_tag) {
    var report = getContentRows(levels_to_tag[x]);
    var entity_map = buildEntityMap(levels_to_tag[x]);
    for(var parent_id in entity_map) {
      var child_list = entity_map[parent_id];
      var stats_list = Object.keys(child_list[0].stats);
      for(var i in stats_list) {
        var mean = getMean(child_list,stats_list[i]);
        var stand_dev = getStandardDev(child_list,mean,stats_list[i]);
        var label_name = stats_list[i]+"_anomaly";
        report += addLabelToAnomalies(child_list,mean,stand_dev,stats_list[i],label_name,levels_to_tag[x]);
      }
    }
    sendResultsViaEmail(report,levels_to_tag[x]);
  }
}
   
//Takes a report and the level of reporting and sends and email
//with the report as an attachment.
function sendResultsViaEmail(report,level) {
  var rows = report.match(/\n/g).length - 1;
  if(rows == 0) { return; }
  var options = { attachments: [Utilities.newBlob(report, 'text/csv', level+"_anomalies_"+_getDateString()+'.csv')] };
  var email_body = "There are " + rows + " " + level + "s that have abnormal performance. See attachment for details.";
  var subject = 'Abnormal ' + _initCap(level) + ' Entities Report - ' + _getDateString();
  for(var i in TO) {
    MailApp.sendEmail(TO[i], subject, email_body, options);
  }
}
   
//Helper function to return a single row of the report formatted correctly
function toReportRow(entity,level,label_name) {
  var ret_val = [AdWordsApp.currentAccount().getCustomerId(),
                 entity.getCampaign().getName()];
  ret_val.push( (level == 'adgroup') ? entity.getName() : entity.getAdGroup().getName() );
  if(level == 'keyword') {
    ret_val = ret_val.concat([entity.getText(),entity.getMatchType()]); 
  } else if(level == 'ad') {
    ret_val = ret_val.concat([entity.getHeadline(),entity.getDescription1(),entity.getDescription2(),entity.getDisplayUrl()]); 
  }
  ret_val.push(label_name);
  return '"' + ret_val.join('","') + '"\n';
}
   
//Helper function to return the column headings for the report
function getContentRows(level) {
  var ret_val = ['AccountId','CampaignName','AdGroupName'];
  if(level == 'keyword') {
    ret_val = ret_val.concat(['KeywordText','MatchType']); 
  } else if(level == 'ad') {
    ret_val = ret_val.concat(['Headline','Description1','Description2','DisplayUrl']);
  }
  ret_val.push('LabelName');
  return '"' + ret_val.join('","') + '"\n';
}
   
//Function to add the labels to the entities based on the standard deviation and mean.
//It returns a csv formatted string for reporting
function addLabelToAnomalies(entites,mean,sd,stat_key,label_name,level) {
  createLabelIfNeeded(label_name);
  var report = '';
  for(var i in entites) {
    var entity = entites[i]['entity'];
    var deviation = Math.abs(entites[i]['stats'][stat_key] - mean);
    if(sd != 0 && deviation/sd >= STANDARD_DEVIATIONS) {
      entity.applyLabel(label_name);
      report += toReportRow(entity,level,label_name);
    } else {
      entity.removeLabel(label_name);
    }
  }
  return report;
}
   
//This is a helper function to create the label if it does not already exist
function createLabelIfNeeded(name) {
  if(!AdWordsApp.labels().withCondition("Name = '"+name+"'").get().hasNext()) {
    AdWordsApp.createLabel(name);
  }
}
   
//This function returns the standard deviation for a set of entities
//The stat key determines which stat to calculate it for
function getStandardDev(entites,mean,stat_key) {
  var total = 0;
  for(var i in entites) {
    total += Math.pow(entites[i]['stats'][stat_key] - mean,2);
  }
  if(Math.sqrt(entites.length-1) == 0) {
    return 0;
  }
  return round(Math.sqrt(total)/Math.sqrt(entites.length-1));
}
   
//Returns the mean (average) for the set of entities
//Again, stat key determines which stat to calculate this for
function getMean(entites,stat_key) {
  var total = 0;
  for(var i in entites) {
    total += entites[i]['stats'][stat_key];
  }
  if(entites.length == 0) {
    return 0;
  }
  return round(total/entites.length);
}
   
//This function returns a map of the entities that I am processing.
//The format for the map can be found on the first line.
//It is meant to work on AdGroups and Keywords
function buildEntityMap(entity_type) {
  var map = {}; // { parent_id : [ { entity : entity, stats : entity_stats } ], ... }
  var iter = getIterator(entity_type);
  while(iter.hasNext()) {
    var entity = iter.next();
    var stats = entity.getStatsFor(DATE_RANGE);
    var stats_map = getStatsMap(stats);
    var parent_id = getParentId(entity_type,entity);
    if(map[parent_id]) { 
      map[parent_id].push({entity : entity, stats : stats_map});
    } else {
      map[parent_id] = [{entity : entity, stats : stats_map}];
    }
  }
  return map;
}
   
//Given an entity type (adgroup or keyword) this will return the parent id
function getParentId(entity_type,entity) {
  switch(entity_type) {
    case 'adgroup' :
      return entity.getCampaign().getId();
    case 'keyword':
      return entity.getAdGroup().getId();
    case 'ad':
      return entity.getAdGroup().getId();
  }
}
   
//Given an entity type this will return the iterator for that.
function getIterator(entity_type) {
  switch(entity_type) {
    case 'adgroup' :
      return AdWordsApp.adGroups().forDateRange(DATE_RANGE).withCondition("Impressions > 0").get();
    case 'keyword' :
      return AdWordsApp.keywords().forDateRange(DATE_RANGE).withCondition("Impressions > 0").get();
    case 'ad' :
      return AdWordsApp.ads().forDateRange(DATE_RANGE).withCondition("Impressions > 0").get();
  }
}
   
//This returns a map of all the stats for a given entity.
//You can comment out the things you don't really care about.
function getStatsMap(stats) {
  return { // You can comment these out as needed.
          avg_cpc : stats.getAverageCpc(),
          avg_cpm : stats.getAverageCpm(),
          avg_pv : stats.getAveragePageviews(),
          avg_pos : stats.getAveragePosition(),
          avg_tos : stats.getAverageTimeOnSite(),
          bounce : stats.getBounceRate(),
          clicks : stats.getClicks(),
          cv : stats.getConversionRate(),
          conv : stats.getConversions(),
          cost : stats.getCost(),
          ctr : stats.getCtr(),
          imps : stats.getImpressions()
         };
}
   
//Helper function to format todays date
function _getDateString() {
  return Utilities.formatDate((new Date()), AdWordsApp.currentAccount().getTimeZone(), "yyyy-MM-dd");
}
   
//Helper function to capitalize the first letter of a string.
function _initCap(str) {
  return str.replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
}
 
// A helper function to make rounding a little easier
function round(value) {
  var decimals = Math.pow(10,DECIMAL_PLACES);
  return Math.round(value*decimals)/decimals;
}