How can I seperate these number from a cell and put it into a matrix.
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I have tried systax "cell2mat" but it didnt work.
2 个评论
Star Strider
2020-2-14
You will have to provide (attach) that file if you want help with it. I was able to find it online although not able to download it.
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Star Strider
2020-2-14
Try this:
[num,txt,raw] = xlsread('2019_nC0v_20200121_20200126_cleaned.xlsx');
vars = regexp(txt(1,:), ',', 'split');
varsc = string(vars{:})
newcell = regexp(txt(2:end), ',', 'split');
C1 = cellfun(@(x)str2double(x(:,1)), newcell);
C2 = cellfun(@(x)x(:,2), newcell);
C3 = cellfun(@(x)x(:,3), newcell);
C4 = datetime(cellfun(@(x)x(:,4), newcell), 'InputFormat','MM/dd/yyyy');
for k = 1:4
C(:,k) = cellfun(@(x)str2double(x(:,k+4)), newcell);
end
COVID19 = table(C1,C2,C3,C4,C(:,1),C(:,2),C(:,3),C(:,4));
COVID19.Properties.VariableNames = {'Nr','Province/State','Country','Date Last Updated','Confirmed','Suspected','Reecovered','Deaths'};
and:
Check = COVID19(1:5,:)
produces:
Check =
Nr Province/State Country Date Last Updated Confirmed Suspected Reecovered Deaths
__ ______________ __________________ _________________ _________ _________ __________ ______
0 {'Shanghai'} {'Mainland China'} 21-Jan-2020 9 10 0 0
1 {'Yunnan' } {'Mainland China'} 21-Jan-2020 1 0 0 0
2 {'Beijing' } {'Mainland China'} 21-Jan-2020 10 0 0 0
3 {'Taiwan' } {'Taiwan' } 21-Jan-2020 1 0 0 0
4 {'Jilin' } {'Mainland China'} 21-Jan-2020 0 1 0 0
I cannot get the variable names to import correctly or parse correctly. I added them manually.
5 个评论
Star Strider
2020-2-15
I am not certain what you mean by ‘classify’. If you want to assign numbers to them, use the findgroups function.
For example —
CountryID = findgroups(COVID19(:,3));
You can do the same for 'Province/State' by referring to column 2 instead.
To combine them, use either of these:
CountryStateID = findgroups(COVID19(:,[2 3]));
CountryStateID = findgroups(COVID19(:,2), COVID19(:,3));
Both produce the same result.
There are other options as well. See: Grouping and Binning Data in the Preprocessing Data documentation section.
更多回答(1 个)
Jon
2020-2-14
You will not be able to put your data from the cell array you show to a matrix because you have both numeric and non-numeric data in your cell array and a MATLAB matrix can be either numeric or non-numeric but not both.
I suggest instead that you store your data in a table where it will be very natural to work with it
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