Extract variables from table and function with loop

Question

wndud77 2024-4-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2105056-extract-variables-from-table-and-function-with-loop

评论： Dyuman Joshi 2024-4-10

采纳的回答： Ayush Anand

Hi,

I have a table with 2317X16, which contains 16 variables of 2317X1. Name of each variable is MC1, MC2, MC3, MC4 ....

I would like to do a msbackadj function of each variable by using loop, then plot it separately.

(Name of another variable for X axis of msbackadj is 'Mshift', also size of 2317X1)

So I use:

for i = 1:16

Mc3 = msbackadj(Mshift,M3a(:,'i'));

Figure;plot(Mshift, M3a(:,'i'));

end

(Mc3 is random name I made for new variable)

And it just worked for 1 variable, but didn't go the loop.

How can I do msbackadj on each variable with using loop?

Thanks,

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Dyuman Joshi 2024-4-10

Using indexing (column numbers) instead of accessing by defining names manually would be a better option.

You can also get the variable names from the table and loop over them.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ayush Anand 2024-4-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2105056-extract-variables-from-table-and-function-with-loop#answer_1439086

在 MATLAB Online 中打开

Hi,

When you are using "M3a(:,'i')", MATLAB is interpreting 'i' as a literal character, not the variable 'i' from your loop. You can instead generate the column name separately using "sprintf" and then use parenthesis to index into the column:

colName = sprintf('MC%d', i);
% Extract the column for the current iteration
currentColumn = M3a.(colName);
% Perform msbackadj on the current column
Mc3 = msbackadj(Mshift, currentColumn);