Change date InputFormat across a cell

8 次查看（过去 30 天）
BN
BN 2022-11-3
回答： Walter Roberson 2022-11-3
Dear all,
How to change datetime format of this attached cell arrays from 1/1/1989 to 1989-1-1?
Here is my try, but it doesnt worked:
d = cellfun(@(OBS_MAX) datetime(OBS_MAX, 'InputFormat', 'yyyy-MM-dd'), OBS_MAX, 'UniformOutput', false);
Thank you all in advanced.

请先登录，再回答此问题。

采纳的回答

Voss
Voss 2022-11-3
load('OBS_MAX.mat')
OBS_MAX = cellfun(@set_dates_format,OBS_MAX,'UniformOutput',false);
function t = set_dates_format(t)
t.dates.Format = 'yyyy-MM-dd';
end

更多回答（1 个）

Walter Roberson
Walter Roberson 2022-11-3
You do not have a cell array of datetime objects: you have a cell array of tables, and you need to affect one particular variable inside the table. This is difficult to do without a helper function, but not difficult if you use a helper function.
d = cellfun(@bashdatesformat, OBS_MAX, 'uniform', 0)
function newT = bashdatesformat(T)
T.dates.Format = 'yyyy-MM-dd');
end
Without the helper function, it gets... messy... involving pulling apart tables and putting them back together into new tables. One might have hopes that you could at least do
cellfun(@(V) subsasgn(V, substruct('.', 'dates', '.', 'Format'), 'yyyy-MM-dd'), C, 'uniform', 0)
but that does not work in practice for this particular case. (It is a trick that can work for some other kinds of variables; see https://www.mathworks.com/matlabcentral/answers/440856-replacing-nans-with-zero-in-a-matrix-within-a-cell-array#answer_357449 )

类别

在 Help Center 和 File Exchange 中查找有关 Dates and Time 的更多信息

标签

产品


版本

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by