Convert string to a cell, array or matrix

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Alfonso Lopez
Alfonso Lopez 2015-11-27
评论： Alfonso Lopez 2015-11-30
Hi everyone,
I was wondering how I could convert an string to array or matrix.
Thanks very much.

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采纳的回答

Titus Edelhofer
Titus Edelhofer 2015-11-30
Hi Alfonso,
first of all, you might consider using the variable "NUM", since it already contains the numbers as double variable. So no need to convert anything. You usually use the RAW format, when the format of the EXCEl file changes, i.e., the indexing into NUM get's more complicated. If RAW(2:end, 65) contains only numbers (as numbers, not strings), probably simply doing
FaceRecall = cell2mat(RAW(2:end, 65));
or
FaceRecall = [RAW{2:end, 65}]';
should both work ...
Titus

更多回答（2 个）

Titus Edelhofer
Titus Edelhofer 2015-11-27
What about this one:
doc str2num
Titus
  1 个评论
Alfonso Lopez
Alfonso Lopez 2015-11-27
I've tried to do this but unfortunately the output is 0... Could you give any other example which I could extrapolate to my data, please?

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Thorsten
Thorsten 2015-11-27
A string is a 1Xn matrix of type char
S = 'hallo';
You can convert it to a numerical matrix using
M = double(S);
If that is not what you want, please give us more details, and a sample string.
  2 个评论
Alfonso Lopez
Alfonso Lopez 2015-11-27
Sorry I'm a beginner in this. I put all I did until moment:
[NUM,TXT,RAW]=xlsread('data.xlsx'); % Open excel data
condition=RAW(2:end,121); % CONDITIONS
subject=RAW(2:end,118); % SUBJECTS
FaceRecall=RAW(2:end,65); % Asign variable
The problem is that this variable appear "{}FaceRecall" in my workspace and when I try to do the mean appears a mistake. I think it's because is not a numeric variable so I would like to know how to convert it.
I don't know if I explain in the best way. Sorry for my English.
Thorsten
Thorsten 2015-11-27
Please post the data.xlsx file such that we can have a closer look.

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