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How to convert character matrix into numeric matrix ? Can you share code for that?

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bavani marimuthu 2017-11-27

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评论： Stephen23 2017-11-28

I have created a matrix that accepts the text file called pub.txt and content in that file is Hello word alone..and displayed it .

str=fileread('pub.txt')

str =

Hello Bava

Hi Hi

Now, I want to convert this character matrix into numeric matrix ? Plz help

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Chafik Zerrouki 2017-11-27

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Did you try with str2num() ?

It will Convert character array to numeric array.

bavani marimuthu 2017-11-27

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can you explain me with the example?

bavani marimuthu 2017-11-27

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I want it for character matrix into numeric matrix , Not for Array?

Rik 2017-11-27

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编辑：Rik 2017-11-27

Apparently it is time for an important lesson every programmer must learn at some point: RT(F)M (read the manual). There are some examples you can find in the documentation for str2num. (If you're operating on scalars, use str2double instead. Use %#ok to suppress the m-lint warning.)

PS array and matrix are more or less interchangeable terms in Matlab

Adam 2017-11-27

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Technically a matrix is 2d and an array is nd in Matlab, but array includes matrix.

Guillaume 2017-11-27

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编辑：Guillaume 2017-11-27

在 MATLAB Online 中打开

What numeric output are you hoping to get out of

 str = 
   Hello Bava
   Hi Hi
   Hi Hi

Are you looking at getting the codepoint of the characters or something else?

bavani marimuthu 2017-11-27

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I have created a matrix that accepts the text file called pub.txt code: str=fileread('pub.txt')

Now, I want to convert this character matrix into numeric matrix ? Plz help

Stephen23 2017-11-27

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@bavani marimuthu: Guillaume asked you a question. Here it is again:

"What numeric output are you hoping to get..?"

Please show us what numeric output you expect to get from those characters.

bavani marimuthu 2017-11-27

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The output I except is this... 100 101 0 0 0 0

Rik 2017-11-27

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在 MATLAB Online 中打开

I can't see a way the string below will result in [100 101 0 0 0 0], so you'll have to explain that.

str = ['Hello Bava';'Hi Hi ';'Hi Hi '];

If your strings contain only numeric values in a char representation (like str='100 101 0 0 0 0';), then using str2num will do the trick.

Stephen23 2017-11-27

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在 MATLAB Online 中打开

"If your strings contain only numeric values in a char representation (like str='100 101 0 0 0 0';), then using str2num will do the trick."

Although using sscanf would be faster and more secure:

>> str = '100 101 0 0 0 0';
>> sscanf(str,'%f')
ans =
 100
 101
   0
   0
   0
   0

bavani marimuthu 2017-11-27

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Thank you..... :-)

bavani marimuthu 2017-11-28

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If my .txt file contains the character called 'Hello' .. Then Whether is there any possibilities to convert it into numeric matrix from character matrix which contains the character in it..

Stephen23 2017-11-28

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