How to parse text to numbers?

Question

Pete sherer 2020-8-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/575551-how-to-parse-text-to-numbers

评论： Pete sherer 2020-8-5

采纳的回答： Stephen23

Hi

I have text cell str looking like this? Is there a way to use regexp to convert this matrix?

ttxt = {'No info','1-50.00000','3-100.000','2-2.0000','Free & Unlimited', '1-100.0000;1-0.0000','1-25.000;1-50.000'}';

ttxt =

{'No info' }

{'1-50.00000' }; % one with 50%

{'3-100.000' } % three with 100% each

{'2-2.0000' } % two with 2% each

{'Free & Unlimited' } % three with 0%

{'1-100.0000;1-0.0000'} % two with first one 100% and 2nd one is 0%

{'1-25.000;1-50.000' } % two with first one 25% and 2nd one 50%

The rules are basically:

when the text is 'No info', it means there are no info, so it returns [0 0 0 0]

When the text is 'Free & Unlimited', it returns [3 0 0 0]

For other cases, there are 2 patterns:

first number > 1: 3-100... or 2-2.00, the first number tells number of repeated %. in this case there are 3 100% and 2 2%, respectively. So it should be [3 1 1 1] and [2 0.02 0.02 0]
multiple cell with ';' {'1-25.00;1-50.00'}; this means there are 2 data with first one is 25%, and 2nd one is 50%, so it should return [2 0.25 0.50 0.0]

want the output matrix to be

tdata = [0 0 0 0;

1 0.5 0 0;

3 1 1 1;

2 0.02 0.02 0;

3 0 0 0;

2 1 0 0;

2 0.25 0.5 0];

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Adam Danz 2020-8-5

Very unclear.

Please explicitly state each rule that translates a row of text to a row of values in the matrix.

Pete sherer 2020-8-5

The rules are basically:

when the text is 'No info', it means there are no info, so it returns [0 0 0 0]

When the text is 'Free & Unlimited', it returns [3 0 0 0]

For other cases, there are 2 patterns:

first number > 1: 3-100... or 2-2.00, the first number tells number of repeated %. in this case there are 3 100% and 2 2%, respectively. So it should be [3 1 1 1] and [2 0.02 0.02 0]
multiple cell with ';' {'1-25.00;1-50.00'}; this means there are 2 data with first one is 25%, and 2nd one is 50%, so it should return [2 0.25 0.50 0.0]

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Answer 1

Stephen23 2020-8-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/575551-how-to-parse-text-to-numbers#answer_475651

编辑：Stephen23 2020-8-5

在 MATLAB Online 中打开

>> ttxt = {'No info';'1-50.00000';'3-100.000';'2-2.0000';'Free & Unlimited';'1-100.0000;1-0.0000';'1-25.000;1-50.000'}
ttxt = 
    'No info'
    '1-50.00000'
    '3-100.000'
    '2-2.0000'
    'Free & Unlimited'
    '1-100.0000;1-0.0000'
    '1-25.000;1-50.000'
>> fun = @(s)sscanf(s,'%f-%f;',[2,Inf]);
>> out = cellfun(fun,ttxt,'uni',0);
>> idx = ~cellfun(@isempty,out);
>> baz = @(m,n)[n,repelem(m(2,:)./100,m(1,:)),zeros(1,3-n)];
>> foo = @(m)baz(m,sum(m(1,:)));
>> out(idx) = cellfun(foo,out(idx),'uni',0);
>> out(strncmpi(ttxt,'No',2)) = {[0,0,0,0]};
>> out(strncmpi(ttxt,'Fr',2)) = {[3,0,0,0]};
>> mat = vertcat(out{:})
mat =
         0         0         0         0
    1.0000    0.5000         0         0
    3.0000    1.0000    1.0000    1.0000
    2.0000    0.0200    0.0200         0
    3.0000         0         0         0
    2.0000    1.0000         0         0
    2.0000    0.2500    0.5000         0