arrays - Python inserting a row in a 2Darray -


i have 5x17511 2d array (name = 'da') made pandas.read_csv(...)

i added 1 column indexing this: da.index = pd.date_range(...)

so 2d array has 6x17511 size now.

i'd insert/append 1 more row 2d array, how this?

i tried with: np.insert(da,1,np.array((1,2,3,4,5,6)), 0) says:

valueerror: shape of passed values (6, 17512), indices imply (6, 17511)

thanks in advance!

i have assumed numpy question rather pandas question ...

you try vstack ...

import numpy np da = np.random.rand(17511, 6) newrow = np.array((1,2,3,4,5,6)) da = np.vstack([da, newrow])

which yields ...

in [5]: da out[5]:  array([[ 0.50203777,  0.55102172,  0.74798053,  0.57291239,  0.38977322,          0.40878739],        [ 0.9960413 ,  0.22293403,  0.34136638,  0.12845067,  0.20262593,          0.50798698],        [ 0.05298782,  0.09129754,  0.40833606,  0.67150583,  0.19569471,          0.75176924],        ...,         [ 0.97927055,  0.44649323,  0.84851791,  0.05370892,  0.94375771,          0.24508979],        [ 0.85952039,  0.2852414 ,  0.85662827,  0.97665465,  0.65528357,          0.71483845],        [ 1.        ,  2.        ,  3.        ,  4.        ,  5.        ,          6.        ]])  in [6]: len(da) out[6]: 17512

and (albeit different random numbers), can access top , bottom of numpy array follows ...

in [9]: da[:5] out[9]:  array([[ 0.76697236,  0.96475768,  0.09145486,  0.27159858,  0.05160006,          0.66495098],        [ 0.62635043,  0.1316334 ,  0.66257157,  0.99141318,  0.77212699,          0.17016979],        [ 0.86705298,  0.11120927,  0.29585339,  0.44128326,  0.32290492,          0.99298705],        [ 0.74053894,  0.90743885,  0.99838398,  0.40713677,  0.17337202,          0.56982539],        [ 0.99136919,  0.13045787,  0.67881652,  0.03814385,  0.98036307,          0.53594215]])  in [10]: da[-5:] out[10]:  array([[ 0.8793664 ,  0.0392912 ,  0.8106504 ,  0.17920025,  0.26767578,          0.98386519],        [ 0.41231276,  0.02633723,  0.7872108 ,  0.60894162,  0.5358851 ,          0.65758067],        [ 0.10341791,  0.48079533,  0.1638601 ,  0.5470736 ,  0.7339205 ,          0.60609949],        [ 0.55320512,  0.12962241,  0.84443947,  0.81012583,  0.22057856,          0.33495709],        [ 1.        ,  2.        ,  3.        ,  4.        ,  5.        ,          6.        ]])

Comments

Post a Comment

Popular posts from this blog

jquery - How do you format the date used in the popover widget title of FullCalendar? -

Image
in fullcalendar, how format date used in popover widget title when clicking '+n more'? code: <div class="fc-popover fc-more-popover"> <div class="fc-header fc-widget-header"> <span class="fc-close fc-icon fc-icon-x"></span> <span class="fc-title">tuesday, april 7</span> ... </div> ... </div> you use daypopoverformat that. determines date format of title of popover created eventlimitclick option. must date formatting string. default value "dddd, mmmm d" english , "ll" other languages.
Read more

asp.net mvc - SSO between MVCForum and Umbraco7 -

i need integrate sso between mvcforum (forum of company) , umbraco7 (manages cms company). however struggling shared authentication work. tried several ways suggested on other threads still not running expected. here did: 1. in mvcforum (forum.mywebsite.com) 1.1. machine key in web.xml: <machinekey validationkey="the same key umbraco7" decryptionkey="the same key umbraco7" validation="sha1" decryption="aes" /> 1.2. authenticate forms in web.xml <forms name="my-sso-auth" protection="all" path="/" timeout="43200" domain="forum.mywebsite.com" loginurl="/members/logon" enablecrossappredirects="true" /> 2. in umbraco7 (news.mywebsite.com) 2.1. machine key in web.xml: <machinekey validationkey="the same key mvcforum" decryptionkey="the same key mvcforum" validation="sha1" decryption="aes" /> 2.2. a...
Read more

Python Tkinter keyboard using bind -

i have problem using bind option can click button in keyboard, , call function once key pressed. tried taking other codes have similar purpose , saw i'm doing pretty same, though still have problem must've missed. thankful if me this. here's code: # -*- coding: utf-8 -*- #imports tkinter import * pil import imagetk, image import time import tkmessagebox #===========================================================================================================================================# #tkinter class class app(frame): def __init__(self, master=none): frame.__init__(self, master) self.pack() #===========================================================================================================================================# #game pieces classes class board: def __init__(self, rows = 7, columns = 6, picture_height = none, picture_width = none): self.rows = rows self.columns = columns self.picture ...
Read more