convert date to datenum import from excel
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hello
I want to import a simple excel file to matlab and convert the column with dates from text to numeric values. The problem is that the rule convert does not show up as an alternativ. I can only replace things. Would be very glad if someone could help.
采纳的回答
I agree that readtable() is the better option but if you decide to stick with the import tool, here's an idea.
In the dropdown menu under your variable name 'dag' where it currently says "Number" in your screenshot, select a date and time option. This will convert your timestamps to datetime format. After importing, you can use datenum() to convert them to double if desired.
Here's a screen shot with a different data set.
3 个评论
ErikJ
2018-7-17
Walter Roberson
2018-7-17
When you click to generate, it should have created importfile.m
Adam Danz
2018-7-17
Yeah, that might be the problem. After you select datetime you'll need to re-generate the importfile() function so the new version accounts for the new format.
更多回答（2 个）
Walter Roberson
2018-7-17
0 个投票
We recommend using readtable() instead. With new enough MATLAB, it can help to use detectImportOptions() with readtable()
ErikJ
2018-7-19
0 个投票
4 个评论
Adam Danz
2018-7-19
Are you looking for xlswrite() ?
ErikJ
2018-7-19
doc xlswrite()
Read about the inputs and how to use this function. There's even an example that shows you how to insert data into specific cells of the spreadsheet. I was about to type up a quick demo but Matlab's documentation covers it. The best way to learn is by digging into the documentation. If you get stuck, come back.
It would be wise to make a copy of your data as you poke around with this function in case you accidentally overwrite your data.
ErikJ
2018-7-19
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