How to extract information from cell?

Question

isabong 2011-7-20

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https://ww2.mathworks.cn/matlabcentral/answers/12009-how-to-extract-information-from-cell

Hello

Well , i have a file which is a cell 47x1. In one of the rows have Lastname=Ahlers I only need Ahlers.The other case is when i have character +numbers, here I have dimension=2 only I need 2,other example is CollX=-5.9 only i need -5.9.

Any idea would be really appreciated guys thanks

Ah I dont know the last name or any data from the file. The idea would be to get the name or value. I need the values (numbers) to run my code,they are parameters inside of my code. Each file is a different patient and each patient has different values.

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Answer 1

Robert Cumming 2011-7-20

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use strfind to find the equal sign and then extract out the data to the right hand side of the equals, i.e.

NEWVAR = str2num(YOURCELL{YOUR_INDEX}(strfind ( YOURCELL{YOUR_INDEX}, '=' )+1:end))

in this case: you have a string "CollX=-5.9"

YOURCELL{1} = 'CollX=-5.9'
NEWVAR = str2num(YOURCELL{1}(strfind ( YOURCELL{1}, '=' )+1:end))

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isabong 2011-7-20

Thanks so much Robert...Very good solution. I dont really love programming but I love Matlab users.

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Answer 2

Jan 2011-7-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/12009-how-to-extract-information-from-cell#answer_16429

在 MATLAB Online 中打开

E.g. by using STRTOK:

C = {'Lastname=Ahlers', 'dimension=2', 'CollX=-5.9'};
[dummy, C] = strtok(C, '=');
strrep(C, '=', '');

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Jan 2011-7-20

@isabong: Obviously I do not understand what you have and what you want. Sorry for trying to guess such details.

What does "I have a file which is a cell 47x1" mean exactly? And "I only need Ahlers"? Do you want to dremove the string "Lastname=" in the file? Or do you want to delete it in the cell string? Or do you want to get the string behind "Lastname=" as separate variable? You see, your question leave some space for interpretations.

isabong 2011-7-20

so so take it easy, sorry sorry yes? forgive me please!

step by step,

1)What does "I have a file which is a cell 47x1" mean exactly? Means, That I have information,and the file contents some parameters that i need to get for my code.

2)And "I only need Ahlers"? Sorry, only I need everything to the right hand after '='.Not all rows, only for a specific rows.

3)Or do you want to delete it in the cell string? mmm I really dont care, only I need extract some information to the righ hand.

4)Or do you want to get the string behind "Lastname=" as separate variable? mmm no, I dont need it. Only I need the information to the right hand as a variable. I dont need the cell,only to extract some values or names.The values gotten will be used in my code. If the row is CollX=-6 (the right hand after '=' is -6),so i need to get -6, and it should be available to be read in my code and take it as a parameter.

5)You see, your question leave some space for interpretations.

It's true! sorry again. I hope to be clear ! thanks

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