Using Datetiim to produce array of time points

Question

Del Ventruella 2017-5-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338534-using-datetiim-to-produce-array-of-time-points

回答： Del Ventruella 2017-5-3

I'm trying to use the Datetime function to produce an array of data points to use as input to an array of impedance values to process and plot. I have entered 8 points for Year, Month, and Day. MATLAB claims this is what it wants, even while it denies the Datetime function and won't work. How can I get this data entered into numerical Year,Month, Day for plotting and analysis?

The datetime function is described here:

https://www.mathworks.com/help/matlab/ref/datetime.html

Thanks.

Sincerely,

Del Ventruella

{ >> Y=[2000;2007;2009;2011;2012;2013;2014;2015]

Y =

>> M = [2;2;2;4;8;11;12;11]

M =

>> D = [12,17,14,16,8,11,13,14]

D =

12 17 14 16 8 11 13 14

>> X = datetime(Y,M,D) Error using datetime (line 579) Data inputs must be the same size, or any of them can be a scalar.

>> len(Y)= len(Y)= ↑ Error: Expression or statement is incomplete or incorrect.

>> length(Y)

ans =

8

>> length(M)

ans =

8

>> length(D)

ans =

8

>> x = datetime(Y,M,D) Error using datetime (line 579) Data inputs must be the same size, or any of them can be a scalar. }

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Steven Lord 2017-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338534-using-datetiim-to-produce-array-of-time-points#answer_265479

Look at the size of the variables Y, M, and D. One of these things is not like the others. Just because two arrays have the same number of elements or the same length does not mean they have the same size. Transpose your D variable and it will work.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Del Ventruella 2017-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338534-using-datetiim-to-produce-array-of-time-points#answer_265486

That's what I did. I still have a problem in that I'm trying to use the dateTime array as in input for the X-axis components of curvefit toobox. It won't recognize the dateTime array. Is there some way I can convert dateTime to an array of numbers?