Extract Data from .txt File

2021 10 27
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更新时间：2021 10 28
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Hi, someone can help me extract data from this .txt File? I'm interested in extracting the numeric values of "PeakEvm" that appears in the file.
I have tried to use textscan, pattern, extract and extractBetween but they are useless for this task.

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Chetan Bhavsar
Chetan Bhavsar 2021-10-27
编辑：Chetan Bhavsar 2021-10-27
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Ran in:
alltext = fileread('Datos_SSB_624_MHz_7_dB.txt');
% extract data between {"peakEvm": and },
allmatches = regexp(alltext,'(?<={"peakEvm":).*?(?=},)','match')
allmatches = 1×16 cell array
{'{"percent":12.372359275817871,"subcarrierNumber":753,"symbolNumber":5'} {'{"percent":13.889286994934082,"subcarrierNumber":522,"symbolNumber":3'} {'{"percent":9.418230056762695,"subcarrierNumber":574,"symbolNumber":2'} {'{"percent":9.726147651672363,"subcarrierNumber":694,"symbolNumber":4'} {'{"percent":13.805439949035645,"subcarrierNumber":517,"symbolNumber":11'} {'{"percent":14.057321548461914,"subcarrierNumber":750,"symbolNumber":9'} {'{"percent":8.600445747375488,"subcarrierNumber":696,"symbolNumber":8'} {'{"percent":8.529023170471191,"subcarrierNumber":698,"symbolNumber":10'} {'{"percent":14.28252124786377,"subcarrierNumber":517,"symbolNumber":19'} {'{"percent":16.036340713500977,"subcarrierNumber":516,"symbolNumber":18'} {'{"percent":8.51211929321289,"subcarrierNumber":579,"symbolNumber":16'} {'{"percent":8.950516700744629,"subcarrierNumber":695,"symbolNumber":18'} {'{"percent":14.643827438354492,"subcarrierNumber":517,"symbolNumber":25'} {'{"percent":15.098423957824707,"subcarrierNumber":519,"symbolNumber":25'} {'{"percent":9.247054100036621,"subcarrierNumber":573,"symbolNumber":22'} {'{"percent":9.152688980102539,"subcarrierNumber":696,"symbolNumber":24'}
% extract data between {"percent": and ,
num1 = regexp(allmatches,'(?<={"percent":).*?(?=,)','match');
% extract data between "subcarrierNumber": and ,
num2 = regexp(allmatches,'(?<="subcarrierNumber":).*?(?=,)','match');
% extract data between "symbolNumber": and end
num3 = regexp(allmatches,'(?<="symbolNumber":).*?(?=)','match');
vertcat(num1{:})
ans = 16×1 cell array
{'12.372359275817871'} {'13.889286994934082'} {'9.418230056762695' } {'9.726147651672363' } {'13.805439949035645'} {'14.057321548461914'} {'8.600445747375488' } {'8.529023170471191' } {'14.28252124786377' } {'16.036340713500977'} {'8.51211929321289' } {'8.950516700744629' } {'14.643827438354492'} {'15.098423957824707'} {'9.247054100036621' } {'9.152688980102539' }
vertcat(num2{:})
ans = 16×1 cell array
{'753'} {'522'} {'574'} {'694'} {'517'} {'750'} {'696'} {'698'} {'517'} {'516'} {'579'} {'695'} {'517'} {'519'} {'573'} {'696'}
vertcat(num3{:})
ans = 16×1 cell array
{'5'} {'3'} {'2'} {'4'} {'1'} {'9'} {'8'} {'1'} {'1'} {'1'} {'1'} {'1'} {'2'} {'2'} {'2'} {'2'}

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