Incorrect number or types of inputs or outputs for function 'dateshift'.

HI, I WANT TO DO THIS:

2021 ****
2022 ****

but it give me error

dateshift(c,'start','year')

>> class(c)
ans =
    'timetable'

Answer 1

[Walter Roberson]

Do you actually need to change the time entries, or do you just need to have them display as years?

Changing the time entries could give challenges if it ended up with duplicate row times.

If you just want to change the display then,

c.Properties.RowTimes.Format = 'uuuu';

If you need to change the actual times then

c.Properties.RowTimes = dateshift(c.Properties.RowTimes, 'start', 'year');

Note that shifting to the start of the year is not enough to change the display to be just year.

[piero]

hi walter

i want to calculate sum for each year in this output:

2007 XXXX

2008 XXXX

2009 XXXX

vvv= timerange(iniz,fine)

vvv =

timetable timerange subscript:

Select timetable rows with times in the half-open interval:

[01-Jan-2022 00:00:00, 14-Jul-2023 00:00:00)

2007 (01-Jan-2007 00:00:00 / 31-12-2007 00:00:00)

2008 (01-Jan-2008 00:00:00 / 31-12-2008 00:00:00)

[piero]

thanks correct...in the table of year i solve with problem with : c.Properties.RowTimes.Format = 'uuuu';

instead in the array of months I want to change it like this

from

01-Jan-2022	-3908.5
01-Feb-2022	10274.5
01-Mar-2022	10496.75
01-Apr-2022	12027.25
01-May-2022	6304.5

to 
31-01-2022 xxx
20-02-2022 xxx


i try code: 

c1 = dateshift(c1.Properties.RowTimes, 'start', 'month');
but i don't see any difference

[piero]

i solve it

c1 = dateshift(b.Properties.RowTimes ,'end', 'month');
A=table;
A.Date=c1;
A.Prof=b.Profit;

thank you