Difficulty Assigning String Values after Regexp

Question

kenny 2013-6-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/79688-difficulty-assigning-string-values-after-regexp

Hi all! I had previously posted about trying to find keywords in a sentence, and I was sent to the regexp page (very helpful, thank you) which allowed me to do just that.

Now that it's possible for me to find the strings i'm looking for, I want matlab to assign each found string its corresponding value, and then multiply these values.

For example, the strings in the array "Good Object" all have a value of 1, and those in "Bad" all have a value of -1. so if i wrote "hurting your brother" regexp would find the keywords in their arrays, and then would return (-1)*(1) = -1.

so far with regexp it correctly finds the string's location in the array and prints it, but i'm having difficulties associating the words with their array values and multiplying them. below is the error i get, but i'm pretty sure it's just the tip of the iceberg. Any help would be greatly appreciated!

thank you

??? Too many outputs requested.  Most likely cause is missing [] around
left hand side that has a comma separated list expansion.
 Error in ==> goodbad at 17
 x = (GoodObjectValue{Gov});

code:

 GoodObject = {'brother', 'sister', 'mother', 'father'};
 GoodObjectValue = {1};
 Bad = {'hurting', 'stealing', 'robbing', 'breaking'};
 BadValue = {-1};
 Gov = find(strcmpi(question,GoodObject));
 Bv  = find(strcmpi(question,Bad));
 question = input ('what?','s')
 GoodExpression = GoodObject;
 BadExpression = Bad;
 matchstr = regexp(question,GoodExpression,'match')
 matchstr = regexp(question, BadExpression,'match')
 x = (GoodObjectValue{Gov});
 y = (BadValue{Bv});
 i=x*y;
 if matchstr(question,GoodObject)&& matchstr(question,Bad)
 disp (i)
 if (i == -1)
    disp('that''s bad')
 else if (i == 1)
        disp('that''s good')
    end
 end  
 end

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Answer 1

Matt Tearle 2013-6-20

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Maybe this is oversimplifying, but I think this does what you're trying to do:

GoodObject = {'brother', 'sister', 'mother', 'father'};
Bad = {'hurting', 'stealing', 'robbing', 'breaking'};
question = input('what? ','s');
Gov = any(~cellfun(@isempty,regexp(question,GoodObject)));
Bv  = any(~cellfun(@isempty,regexp(question,Bad)));
if (Gov && Bv)
    disp('that''s bad')
else
    disp('that''s good')
end

If I interpret your question correctly, the key thing is that you're trying to see if anything in the question string is in either list of keywords. That's what

Gov = any(~cellfun(@isempty,regexp(question,GoodObject)));
Bv  = any(~cellfun(@isempty,regexp(question,Bad)));

does. As I have it, these are logical values. You could easily modify them to be numeric, if you actually need that.

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kenny 2013-6-20

bingo!

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Answer 2

David Sanchez 2013-6-20

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在 MATLAB Online 中打开

you did not define neither the value of Gov nor bv.

Your code:

 x = (GoodObjectValue{Gov});
 y = (BadValue{Bv});
 i=x*y;
 Gov = find(strcmpi(question,GoodObject));
 Bv  = find(strcmpi(question,Bad));

It should be something like:

 Gov = find(strcmpi(question,GoodObject));
 Bv  = find(strcmpi(question,Bad));
 x = (GoodObjectValue{Gov});
 y = (BadValue{Bv});
 i=x*y;

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David Sanchez 2013-6-20

could you show the new code and the error again?

kenny 2013-6-20

在 MATLAB Online 中打开

error reads as :

 ??? Too many outputs requested.  Most likely cause is missing [] around
left hand side that has a comma separated list expansion.
 Error in ==> goodbad at 8
 x = (GoodObjectValue{Gov});

code:

 GoodObject = {'brother', 'sister', 'mother', 'father'};
 GoodObjectValue = {1};
 Bad = {'hurting', 'stealing', 'robbing', 'breaking'};
 BadValue = {-1};
 Gov = find(strcmpi(question,GoodObject));
 Bv  = find(strcmpi(question,Bad));
 x = (GoodObjectValue{Gov});
 y = (BadValue{Bv});
 i=x*y;
 question = input ('what?','s')
 GoodExpression = GoodObject;
 BadExpression = Bad;
 matchstr = regexp(question,GoodExpression,'match')
 matchstr = regexp(question, BadExpression,'match')
 if matchstr(question,GoodObject)&& matchstr(question,Bad)
 disp (i)
 if (i == -1)
    disp('that''s bad')
 else if (i == 1)
        disp('that''s good')
    end
 end  
 end