input string data in the function

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Muhammad on 27 May 2021
Commented: Adam Danz on 28 May 2021
function compare_cases(country1,names,days,avg_days,dailycases)
IndexC = strfind(names,'country1');
[row,col] = find(not(cellfun('isempty',IndexC)))
dailydata= dailycases(row,:);
my workspace has following loaded files
names 332*2 double
days 1*430 datetime
dailycases 332*429
when i call function i have to put the name of the country in place of 'country1'
% calling fuction to trace the data of china in the 'names' folder
but it doesnot intake string data
country1 in the function is not taking input an string data
what should be done,

Accepted Answer

Adam Danz
Adam Danz on 27 May 2021
Edited: Adam Danz on 27 May 2021
You're not using the contry1 variable at all in your function. Instead, you've replace it with a character vector 'county1' which is not a variable. Remove the single quotes,
IndexC = strfind(names,country1);
I assume that your first input China is a variable
China = 'China';
Also note that strfind is a case-sensitive search. To avoid problems with cases, consider using
IndexC = strfind(lower(names),lower(country1));
Another problem is that strfind will accept partial matches. For example,
names = {'Korea','North Korea'}; % using "South Korea" would fix this, too
country = 'Korea';
strfind(names, country)
ans = 1×2 cell array
{[1]} {[7]}
To eliminate this problem and to improve code efficiency, consider using ismember or strcmpi
strcmpi(names, country)
ans = 1×2 logical array
1 0
Another big problem is, according to your workspace description, names is a numeric matrix so how do you expect there to be a string match between a word 'China' and numbers?
Adam Danz
Adam Danz on 28 May 2021
My answer explains the problem. You're not putting quotes around the word china.

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