pandas - Remove duplicates indices in multiindex regardless of order -


take simple pd.series multi-index:

#create multiindex , data mult = pd.multiindex.from_product([[1,2,3],[1,2,3]],names=['factor1','factor2']) data = np.arange(1,4)*np.arange(1,4)[:,np.newaxis]  #create series ser = (pd.series(data.ravel(),                 index=mult,                 name='product')        .sort_values(ascending=false))  print(ser) factor1  factor2 3        3          9          2          6 2        3          6          2          4 3        1          3 1        3          3 2        1          2 1        2          2          1          1 name: product, dtype: int64

how can duplicate indexes, regardless of order, removed final series is

factor1  factor2 3        3          9          2          6 2        2          4 3        1          3 2        1          2 1        1          1 name: product, dtype: int64

the idea 2*3 , 3*2 same factors , want rid of one. i've tried drop_duplicates, eliminates duplicate products regardless of indices (so 1*0 , 2*0 considered duplicates).

hacky 

ser[~pd.dataframe(np.sort(np.array(ser.index.tolist()), 1)).duplicated().values]  factor1  factor2 3        3          9          2          6 2        2          4 3        1          3 2        1          2 1        1          1 name: product, dtype: int64

Comments

Post a Comment

Popular posts from this blog

javascript - Create a stacked percentage column -

i have collection of data : var data = [ {"p301a":"10","p301b":"7","p301c":"7","p301d":"3","p301e":"8","p301f":"8","p301g":"8","p301h":"8","p301i":"8","p301j":"8","p301k":"8","p301l":"8","p301m":"8","p301n":"8","p301o":"8","age":"31-40 years","profesion":"2","position":"2"}, {"p301a":"5","p301b":"4","p301c":"4","p301d":"4","p301e":"4","p301f":"4","p301g":"4","p301h":"4","p301i":"4","p301j":"4","p301k":"4...
Read more

Optimising Firebase database by automatically overwriting data -

in firebase app have following structure: posts latest all users can write posts > latest . want limit entries 20 posts save space in database. , posts beyond 20 unnecessary never shown on homepage. how can limit posts 20, when user writes posts > latest posts @ end drop off (be deleted) automatically? this sample should you. you need : const max_log_count = 20; exports.removeold = functions.database.ref('/posts/latest/{postid}').oncreate(event => { const parentref = event.data.ref.parent; return parentref.once('value').then(snapshot => { if (snapshot.numchildren() >= max_log_count) { let childcount = 0; const updates = {}; snapshot.foreach(function(child) { if (++childcount <= snapshot.numchildren() - max_log_count) { updates[child.key] = null; } }); // update parent. removes children. ...
Read more

javascript - Angular UI-Grid customTemplate directive causing rows to load slowly/? -

Image
each grid cell can have more 1 customtemplate loaded. have directive holds watcher on model_col_field listen cell updates on scroll when dom rows updated , recompile celltemplate . without watcher , $compile rows repeat on scroll, showing same set of rows. is there more angular way of approaching or way improve performance? relevant controller code: create gridoptions.data & gridoptions.columndefs : var customtemp = '<div ng-repeat="opt in grid.appscope.colvalueoptionsmodel" ng-init="tempstring=model_col_field.clazz+opt.key;"><comparison-directive dbo="model_col_field" attobj="opt" fff="grid.appscope.getattributetemplate(tempstring)" /></div>'; $scope.gridoptions.columndefs = [ { name:'yindex',pinnedleft:true,celltemplate: customtemp, displayname:'index'}, { name:'col1',celltemplate: customtemp}, { name:'col2',celltemplate: c...
Read more