No InputFormat 'YYMMDD' found for datetime

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Sim 2024-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/2114321-no-inputformat-yymmdd-found-for-datetime

编辑： Stephen23 2024-5-2

采纳的回答： Steven Lord

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Is there a way to transform '240331' into '31 March 2024' ?

The following does not work:

datetime('240331',InputFormat,'YYMMDD')
Unrecognized function or variable 'InputFormat'.

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Stephen23 2024-5-2

编辑：Stephen23 2024-5-2

在 MATLAB Online 中打开

"No InputFormat 'YYMMDD' found for datetime"

https://www.mathworks.com/help/matlab/ref/datetime.html#buhzxmk-1-Format

Character case matters!

"Is there a way to transform '240331' into '31 March 2024' ?"

datetime('240331', 'InputFormat','yyMMdd', 'Format','dd MMMM yyyy')
ans = datetime
   31 March 2024

Sim 2024-5-2

Thanks a lot @Stephen23!! :-)

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Answer 1

Steven Lord 2024-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/2114321-no-inputformat-yymmdd-found-for-datetime#answer_1451391

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Either leave the quotes off but use == (if you're using a sufficiently recent release) or add quotes. You will need to adjust your format specifier, though.

datetime('240331',InputFormat = 'yyMMdd')
ans = datetime
   31-Mar-2024
datetime('240331','InputFormat','yyMMdd')
ans = datetime
   31-Mar-2024

You need to use 'yy' instead of 'YY' and 'dd' instead of 'DD'.

datetime('240331',InputFormat = 'YYMMDD')

Error using datetime (line 669)
The format 'YYMMDD' contains an unsupported symbol: 'Y'. See the datetime.Format property for a complete description of the identifiers used in datetime formats.

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Steven Lord 2024-5-2

Since the format needs to have ways to represent both the Month component and the minute component of a datetime, the most natural representation IMO is for M to be case sensitive. [This was not a choice MathWorks made; that's part of the Unicode Locale Data Markup Language specification linked from the documentation page I reference below. I believe the LDML uses the symbols from ISO standard 8601.]

The table in the entry for the Format property on the datetime documentation page lists the character and character sequences that have special meanings when used in a format specifier (either the InputFormat name-value argument to the constructor or the Format property which can be set in the constructor or after the object has been created.)

Sim 2024-5-2