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  • Varaince of panel data which is not balanced

    Hello dear Stata users,
    I have a panel dataset of WINDSPEED for each districts for Seven years. Is it possible to calculate the varaince for each district for each quarter. Could anyone help me with the code.

    Code:
    * Example generated by -dataex-. For more info, type help dataex
    clear
    input long state_district byte quarter float(ws_2023 ws_2022 ws_2021 ws_2020 ws_2019 ws_2018 ws_2017)
     352 1 4.589247 3.613052 4.267717 4.635023 4.930599 3.780835 4.673967
     352 1 4.079226 4.215449 3.877388 4.538066 3.682131 3.676485 3.948466
     352 1 3.171698 2.644508  2.92275 3.351344 3.177872 2.893883 3.182198
     352 2 2.689871 2.156992 2.136186 2.872274 2.989198 2.722031 2.906296
     352 2  4.14325 5.455741 3.406546 3.855165 3.735876 2.974356 3.366552
     352 2  5.78509 4.582315  5.06107 4.991875 5.848218 6.734819 6.140237
     352 3 6.180731 4.725333  5.93688 4.066154 5.917521 6.973715 5.876394
     352 3 5.776236 5.244017 4.860325 5.294113 7.112219 7.073696 5.248257
     352 3 5.926691 4.340836 4.858127 4.631201 4.920815 4.280732 4.387124
     352 4 2.832476 4.086142 3.879084 3.524881 2.504806 3.259824 3.722174
     352 4  3.89687 3.366515 4.069301 4.236919 3.831769 4.167921 4.207607
     352 4 4.377546  4.54319 4.715546 4.315512 4.674977 4.296709 4.937579
     353 1 6.210341 4.802261   6.2101 6.206068 6.416927 4.771069 6.214251
     353 1 5.469119 5.677119 5.161079 6.119121 5.056155  5.20627 5.359843
     353 1 4.022772 3.287575 3.717183 3.603297 3.418595 3.492516  3.59089
     353 2 3.014578 2.633554 2.704057 3.562704  3.44037 3.314805 3.605515
     353 2 5.758973 7.633964 4.783988 5.456239 5.274939 3.910879 4.607275
     353 2 8.273372 6.252726 7.027379 7.017265 8.193433 9.077105 8.145121
     353 3 8.684149  7.11254  8.41686 5.523673 7.773966  9.72518 8.343679
     353 3 8.257681 7.702024 7.115208 7.253097 9.670324 9.874477 7.653042
     353 3 8.256769 6.616227 6.917697 6.731298 6.786049 5.860077 6.402016
     353 4  3.68233 4.764365 5.604181 5.805154 3.288253 3.944639 5.052252
     353 4 5.013813  4.12091 4.951137 5.162457 5.361066 5.314161 4.652676
     353 4 5.805525 6.347145 6.215302 5.600912 6.451589 5.682451 6.354571
    2813 1 2.071669 1.906998 1.939836 2.075697 2.161556 1.867749 2.186907
    2813 1 2.252566 2.123164 2.052436 2.442608 2.446047 2.056368 2.235332
    2813 1 2.232489 2.296364 2.168355 2.435328 2.616105   2.0682  2.37214
    2813 2 2.163504 2.317636 2.062944 2.230672 2.365663 2.306504 2.151902
    2813 2 2.233094 2.828299 2.821097 2.442079 2.263708 2.127188 2.934911
    2813 2 3.514094 2.797159 3.412144 3.196953 3.428785 3.854449  3.74473
    2813 3 4.419012 3.583243 3.530141 2.285392 3.653605 4.687582 4.112722
    2813 3 2.849966 3.091185 2.984837 3.136886 3.922278 5.022915 2.880093
    2813 3 2.927668 2.581071 2.732151 2.731299 2.755776  2.25119 2.190346
    2813 4 1.935015 2.111777 1.777521 2.475076 1.535323 1.955869 1.695318
    2813 4 2.019673 2.092834 2.257045 2.613384 2.126691 2.197218 2.132412
    2813 4 2.483747 2.478249 1.963105 2.345541 2.264333 2.242998 2.073321
     284 1 1.987441  1.91066  1.86635 1.984144 1.924251 1.669018 1.983049
     284 1 1.724246 1.956904 1.953315 2.075664 1.991458 1.761446 1.777079
     284 1 1.760321 1.935036 1.757222 1.722926 1.879776 1.877282 1.911202
     284 2 1.681082 2.006113 1.659624 1.749227 1.864686 1.898789 2.223191
     284 2 1.778992 2.451346 2.086234 1.976747 2.230505 1.910879 1.914892
     284 2 2.416438 2.145792 2.653355 2.153984  2.45271 2.329058  2.48887
     284 3 3.393621 3.058341 2.791372 2.005118 2.855509 3.480551  3.17864
     284 3 2.665884 2.605833 2.375462 3.258956 3.166419 3.685513 2.249233
     284 3  2.15716 2.018571 2.208713 1.722998 2.432045 1.953339 1.662759
     284 4   1.6794 1.821005 1.460138 1.546854 1.725753 1.699766 1.331305
     284 4 2.362202 1.841369 2.649868  2.37022 1.928938 1.887892 1.993252
     284 4 2.372175  2.15403 1.945038 1.970053 2.424489  2.20125  1.92171
     287 1 2.011366  2.08107 1.888078 2.175307 2.046566 1.711987  2.04384
     287 1 1.931765 2.307734 2.067085  2.44749 2.500002 1.985567  2.09666
     287 1 2.373602 2.458717 2.115621 2.740993 2.991105 2.510094 2.925362
     287 2 2.548758 2.958261 2.527299 2.988973 3.118593 3.251816 2.894578
     287 2 2.386414 3.009452 3.237601 2.876161 3.080603 3.112051 2.889013
     287 2 3.161067 3.017374 3.293492 2.636406 3.111402  2.99898 2.789651
     287 3 3.664129 3.093009 3.062856 2.255607 3.121134 3.479086 3.147878
     287 3  2.84606 2.704954  2.66013 3.023605 3.152747  3.65231 2.367398
     287 3 2.383722  2.29152 2.370334 2.238135 2.599038 2.126679 1.888833
     287 4 1.867388 1.978476 1.748224 1.915506 1.639327 2.064756 1.631842
     287 4 2.148823 1.817687 2.462612 2.304302 1.947004 2.018751 2.124355
     287 4 2.385847 2.008522   2.1362 2.018637 2.262868 2.301592  2.08919
     286 1 2.016982 2.063248 1.918352 2.203383 1.990902 1.675122 2.033587
     286 1 1.856081    2.255 2.059272 2.462871 2.399661 1.932588  1.99705
     286 1 2.299871 2.319313  1.99648 2.563258 2.707413 2.299645 2.696358
     286 2 2.327566 2.709238 2.341753 2.732137 2.801698 2.962754  2.68071
     286 2 2.228699 3.014823 3.060355 2.668153 2.813513 2.880606 2.612157
     286 2 3.126399 2.921671 3.138706 2.625664 3.053785 2.862261 2.795511
     286 3 3.683172 3.185294 3.050161 2.216544 3.118937 3.509848 3.201589
     286 3 2.813833 2.691771 2.644016 3.143722 3.177161 3.748501 2.381069
     286 3 2.350031  2.26027 2.358615 2.152197 2.562905 2.069306 1.837807
     286 4 1.858355 1.990195 1.677424 1.873514 1.681808 1.952695 1.604742
     286 4 2.297016 1.859923 2.603725 2.351421 2.027082 2.004835 2.172207
     286 4 2.444685 2.104958 2.152802 2.059896 2.402516 2.272051   2.0992
     288 1 2.056532 1.886978 1.878557 2.033217 2.102474 1.978589 2.157366
     288 1 2.212771 2.158808 2.061958 2.473369 2.435305 2.272676 2.309306
     288 1 2.228094 2.156715 2.145406 2.709743 2.781388 2.305505 2.603585
     288 2 2.488699 2.457773 2.239213 2.510946 2.591737 2.673691 2.364792
     288 2 2.438172 2.945487 3.199027 2.526551 2.601599 2.514883 2.920263
     288 2 3.734309 3.287393 3.806187 3.250664 3.603101 4.160601 3.837503
     288 3 4.495672 3.738028 3.756704 2.563712 4.048136 4.704184 3.989675
     288 3 3.301626 3.308958 3.112278 3.540206 4.179602 4.823696 2.978726
     288 3 3.134211 2.628434 3.065647 2.743994 2.827065 2.477021 2.204995
     288 4 2.264361 1.964804 1.912775 2.033182 1.671065  2.17169  1.69776
     288 4 2.124653 1.995422 2.382534 2.313824  1.98924 2.006056 2.220546
     288 4  2.34654 2.072243 1.885468 2.081381 2.116383 2.190996 2.209795
     289 1  2.44496 2.590836 2.425676 2.605971 2.501644 2.515942 2.757463
     289 1 2.508425 2.762568 2.567573 3.126446 3.197756  2.60129 2.800029
     289 1 3.205389 3.237282 2.953511 3.691676  4.10756  3.36654 4.029366
     289 2 3.662039 3.821054 3.530229 3.994833 4.279237 4.280625 4.094285
     289 2 3.212586 3.671073  4.05303 3.806825 4.215857  3.95336 3.870458
     289 2 3.785578  3.46171 3.949253 3.267265 3.760816 3.631304 3.623147
     289 3 4.028875 3.644278 3.422719 2.675529 3.510783 4.426352 3.740652
     289 3 3.309439 3.221068 3.280735 2.928878 3.648352 4.515591 3.001187
     289 3 3.065851 2.845231 2.899631 2.802588 3.053627 2.959442 2.436929
     289 4  2.54024 2.594199 2.424494 2.607889 2.401534 2.679014    2.344
     289 4 2.683003 2.720275 3.157192 3.142681 2.674055 2.672804 2.926601
     289 4 3.434187 2.877907 2.651093 3.038168 2.910573  2.87581 2.851641
     281 1 3.073378 3.212418 2.792619 3.054945 2.819027 2.648022 2.986223
     281 1 3.036501 3.030879 3.170356  3.00584 3.223879 2.857637  2.92332
     281 1   3.2237 3.786842 3.660542 3.183375 4.176651 4.108239 4.844308
     281 2 3.600516 5.530527  4.27437 4.589071 4.829042  5.10582 5.711472
    end

  • #2
    Code:
    bys state_district quarter: egen var = var(ws_2023)

    Comment


    • #3
      Thank you very much for your response. This works fine only instead of var() one need to use sd ().


      Regards
      Last edited by saptorshee chakraborty; 18 Sep 2024, 23:19.

      Comment

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