Issue with loading datetime from table

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Sue MM
Sue MM 2019-7-23
回答： Eric Sofen 2019-7-29
Hi, I have a simple 3 column CSV file with column 1 = names, column 2= address column = dates. I load the CSV using readtable()
Data= readtable(‘FileMaker.csv’);
C = table2cell(data)
Dates = C(:,3)
DateId = datetime(dates)
However I keep getting the error using datetime(639) input data must be numeric array, string array, cell array containing character vectors, or char matrix.
The cell for dates is showing up as a datetime when I look at the workspace but I’m not sure how to overcome the error message. Any help would be greatly appreciated!

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回答（2 个）

Eric Sofen
Eric Sofen 2019-7-29
There's no reason to go through cell to pass the datenums into datetime:
Data = readtable(‘FileMaker.csv’);
Dates = datetime(Data.Var3, 'ConvertFrom', 'datenum') % assuming default variable names in the table.
Joel Handy
Joel Handy 2019-7-23
编辑：Joel Handy 2019-7-23
There appears to be two issues with your code. The first is that datetime doesn't take a cell array of numbers so you need to convert the cell array containing datetimes to a numeric array. The second issue is that datetime needs you to explicitly tell it that you are giving it datenums. I think the following code will work for you.
Dates = [C{:,3}];
% OR
Dates = cell2mat(C(:,3));
DateId = datetime(Dates, 'ConvertFrom', 'datenum')

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