Return a value from a table
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Hello,
I have a table of annual quarters as row names and the dates those quarters began as a variable. I'm trying to create a command where given a quarter (R) I can lookup the quarter start date. I've read the documentation and searched for answers here, but am very lost so I'd appreciate any help!
Quarter = {'Q12019'; 'Q22019'; 'Q32019'; 'Q42019'; 'Q12020'; 'Q22020'; 'Q32020'; 'Q42020'};
QuarterStartDate = ['2019-01-01'; '2019-04-01'; '2019-07-01'; '2019-10-01'; '2020-01-01'; '2020-04-01'; '2020-07-01'; '2020-10-01'];
T = table(QuarterStartDate, 'RowNames', Quarter);
R = 'Q32019';
S = T(Quarter == 'R')
I was able to do something similar earlier that worked, but that was using numbers rather than characters. I tried doing the same thing, but that didn't work.
C = [ .80 ; .85 ; .90 ; .95];
P = [.55 ; .49 ; .44 ; .44];
T = table(C, P);
R = 0.95;
S = T{C == R, 2};
Thanks!
5 个评论
dpb
2019-11-29
Help us out by attaching a (smallish) section of the table as .mat file...
Ivan Glinski
2019-11-29
Walter Roberson
2019-11-30
S = T(strcmp(T.Quarter,'R').QuarterStartDate;
Ivan Glinski
2019-11-30
编辑：Ivan Glinski
2019-11-30
Image Analyst
2019-11-30
Try T.QuarterStartDate instead of T.Quarter.
采纳的回答
Quarter = {'Q12019'; 'Q22019'; 'Q32019'; 'Q42019'; 'Q12020'; 'Q22020'; 'Q32020'; 'Q42020'};
QuarterStartDate = ['2019-01-01'; '2019-04-01'; '2019-07-01'; '2019-10-01'; '2020-01-01'; '2020-04-01'; '2020-07-01'; '2020-10-01'];
T = table(QuarterStartDate, 'RowNames', Quarter);
R = 'Q32019';
S = T(R,:)
results in:
S =
table
QuarterStartDate
________________
Q32019 2019-07-01
if you need only the content use curly braces:
S = T{R,:}
S =
'2019-07-01'
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