how to substitute, in a table, variable names with the values of a vector

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Francesco Grechi
Francesco Grechi 2021-4-2
评论： Steven Lord 2021-4-2
i have a table of 6 colums U and each colums have its title (Nation, valueA, valueB, valueC, valueD, valueE). I want to substitute the last 5 colums names with the numbers contained in the vector X.
X = [1 2 3 4 5 ]
U is 20x6

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回答（1 个）

Sajid Afaque
Sajid Afaque 2021-4-2
for num = 2:5
table_name.Properties.VariableNames(num) = {'New substitute name here in this case X(num-1)'};
end
  2 个评论
Francesco Grechi
Francesco Grechi 2021-4-2
i think that could be a good idea however if i put:
table_name.Properties.VariableNames(num) = {'X(num-1)'};
i got the following error (because matlab doesn't accept the ''):-->
'X(num-1)' is not a valid table variable name. See the documentation for isvarname or matlab.lang.makeValidName for more information.
Steven Lord
Steven Lord 2021-4-2
Ran in:
The ability to specify table variable names that are not valid MATLAB identifiers was introduced in release R2019b. Prior to that all table variable names had to be valid MATLAB identifiers (as per the isvarname function.)
T = array2table(magic(4))
T = 4×4 table
Var1 Var2 Var3 Var4 ____ ____ ____ ____ 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1
newVariableNames = {'aardvark', 'baboon', 'camel', 'dog'};
T.Properties.VariableNames = newVariableNames
T = 4×4 table
aardvark baboon camel dog ________ ______ _____ ___ 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1

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