python - Pandas - Filtering text and data -


we have learnt how filter through pandas in python thought try out on public data set. (http://data.wa.aemo.com.au/#stem-bids-and-offers)

i used august's data this.

the challenge set myself filter on $/mwh > 0 , had on bids. have learnt how use np.logical_and filter problem found can filter on either numerical or logical. not both.

i have approach works , gets me data , visualisation i'm after i'm there more efficient way of filtering text , numeric fields. problem approach works if character size different. i.e. if said bid or fib. pick both. only want pick bid. please point me in right direction?

here code:

#task: want filter out positive $/mwh bids #this requires 2 filters - 1 filter out $mwh > 0 , 1 filter bids  # try converting numpy array , using filtering mechanisms there import numpy np df = pd.read_csv('stem-bids-and-offers-2017-08.csv') df.head(5) #i don't know how filter 'text' yet have use way using len function #this reduce bid/offer field characters  df['bolength'] = df['bid or offer'].apply(len) df.head(5) filtbypricebid = np.logical_and(df['price ($/mwh)'] > 0, df['bolength'] == 3) filtbypricebid.head(5)  df2 = df[filtbypricebid] df2.head(10)  sns.kdeplot(df2['price ($/mwh)'], shade=true)

ps: attached kde plot came out of this. if wants provide interpretation on well, please feel free so! expecting normalised distribution unfortunately, not case.

enter image description here

i hope looking for.

you use & have multiple filters together

sns.kdeplot(df[(df['price ($/mwh)'] > 0) & (df['bid or offer']=='bid')]['price ($/mwh)'], shade=true)

Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more