read csv file: variable name consists of multiple words: resulting table variable name

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alpedhuez 2021-1-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/725417-read-csv-file-variable-name-consists-of-multiple-words-resulting-table-variable-name

评论： Walter Roberson 2021-1-24

采纳的回答： Nolan Canegallo

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I readtable a csv file of the format

date  new york
---------------------
1/1/2021  15
1/2/2021  20

Then the resulting table has

class_Var1 class_NewYork
----------------------------
datetime double

But I just want to have a variable name 'New York'. Is it possible?

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Nolan Canegallo 2021-1-24

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https://ww2.mathworks.cn/matlabcentral/answers/725417-read-csv-file-variable-name-consists-of-multiple-words-resulting-table-variable-name#answer_604902

编辑：Nolan Canegallo 2021-1-24

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If you have R2020b+, then you can use a modifier:

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

tableName = readtable('filename.csv','VariableNamingRule','preserve')

If you have R2019b+, then you can use the modifier:

tablename = readtable('filename.csv','preservevariablenames',true)

Credit to Walter Roberson for noticing this typo in the documentatation.

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Nolan Canegallo 2021-1-24

编辑：Nolan Canegallo 2021-1-24

I agree that it is easy enough to check, however, it does not mention the correct date in the section with the flag. I think including R2019b in this section is misleading, since it implies that this flag is compatible with R2019b.

Walter Roberson 2021-1-24

Again, you are assuming that the "Starting in R2019b" applies to the whole paragraph, but it does not.

Consider "Starting in 1979, I no longer lived in the house I grew up in. I live in central Canada." Does that mean that I have lived in central Canada all of my life? Does that mean that I have lived in central Canada since 1979? Does the second sentance somehow become incorrect when you know that I have lived in central Canada since the early 1990s, and if so where is the error, since both parts are individually true?

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