extracting data from set of data

Question

Zakarya Haidari 2022-5-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1721700-extracting-data-from-set-of-data

评论： Zakarya Haidari 2022-5-26

hi there so i have this set of data :

all_data1 = importdata("owid-covid-data_2020-21.csv");
num_data1 = all_data1.data;
text_data1 = all_data1.textdata;
days_tarcked= num_data1(:,1);
total_case= num_data1(:,2);
total_death= num_data1(:,3);
code_id = string(text_data1((2:end),1));
continent = string(text_data1((2:end),2));
location_countries = string(text_data1((2:end),3));
data_countries = string(text_data1((2:end),4));

that is about the days tracked by different countries for tracking there number of cases, and im trying to extract the countries that didnt have at leaset 396 entries for there days track from variable days track and location_countries.

any hint or suggestions will be appreciated.

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KSSV 2022-5-18

Attach your data and tell us what you want. It can be achieved with few steps depending on how data is and how it is read.

Zakarya Haidari 2022-5-20

owid-covid-data_2020-21.csv

so if you have look at the excel sheet, there are

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Answer 1

David Hill 2022-5-20

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1721700-extracting-data-from-set-of-data#answer_967870

在 MATLAB Online 中打开

t=readtable('owid-covid-data_2020-21.csv');
u=unique(t.Location);
count=0;
for k=1:length(u)
    m=movsum(diff(t.TotalCases(ismember(t.Location,u(k)))),3);
    if all(m<396)
        count=count+1;
        C{count}=u{k};
    end
end