Converting letters to strings
显示 更早的评论
Dear Matlab users
I read some data from an excel file. The column 11 of this file contains
Baa1
Ca
Baa
B
Aaa
and so forth. When I use
raw=xlsread('file.xlsx');
K=raw(:,11)
I get NaN for each element of K. My questions is how to convert column 11 to a column of string variables. Note that my column is of dimension 20000 by 1. Is there a command in Matlab to do that?
Thanks in advance
采纳的回答
per isakson
2014-2-23
编辑：per isakson
2014-2-23
The documentations says:
[ num, txt, raw ] = xlsread( filespec );
Thus try
[~,~,raw] = xlsread('file.xlsx');
Now, K will contain the column of strings. You could also use the argument, txt, but then the column number might be "shifted" depending on whether there are numerical columns to the left (C<=10).
"column of string variables" do you mean a character array or a cell array of strings?
更多回答（1 个）
Image Analyst
2014-2-25
0 个投票
If you have R2013b you should use readtable() instead of xlsread(). It's so so much easier. Instead of all that nonsense of 3 cell arrays, which aren't even matched up as far as rows and columns go, you get a simple and intuitive "table" - which is a new variable class in R2013b that I encourage everyone to try.
ONCE YOU TRY readtable(), YOU'LL PROBABLY NEVER USE xlsread() EVER AGAIN.
Another use of the table is to use with regionprops() and struct2table() to create a table instead of an array of structures. I'll contact the Image Processing team to see if they can make a table an option directly instead of having to use struct2table.
类别
在 帮助中心 和 File Exchange 中查找有关 Data Type Conversion 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
