if Statement for text files

Question

Juan Rosado 2012-7-10

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43171-if-statement-for-text-files

Greetings,

I have this cell array that displays this text:

urlwrite('http://weather.noaa.gov/cgi-bin/fmtbltn.pl?file=forecasts/marine/coastal/am/amz725.txt','Water_Coastal_Southern_Puerto_Rico_Out.txt'); % URL from forecast web page
fid=fopen('Water_Coastal_Southern_Puerto_Rico_Out.txt');
y=fgetl(fid);
data = textscan( fid, '%s', 'Delimiter', '');  %read the entire file as strings, one per line.
fclose(fid);
out = regexprep( data{1}, '<[^>]+>', '' )  %remove the HTML
n=length(out);
out = 
      'CWFSJU'
      'COASTAL WATERS FORECAST'
      'NATIONAL WEATHER SERVICE SAN JUAN PR'
      '1024 PM AST MON JUL 9 2012'
      'PUERTO RICO AND U.S. VIRGIN ISLANDS WATERS'
      ''
      'AMZ725-101500-'
      'COASTAL WATERS OF SOUTHERN USVI VIEQUES AND EASTERN PUERTO RICO OUT'
      '10 NM-'
      '1024 PM AST MON JUL 9 2012'
      'REST OF TONIGHT'
      'EAST WINDS 12 TO 16 KNOTS. SEAS 3 TO 4 FEET.'
      'ISOLATED SHOWERS. '
      'TUESDAY'
      'EAST WINDS 12 TO 16 KNOTS. SEAS 3 TO 4 FEET. HAZE.'
      'ISOLATED SHOWERS. '
      'TUESDAY NIGHT'
      'EAST NORTHEAST WINDS 13 TO 16 KNOTS. SEAS 3 TO'
      '4 FEET. HAZE. ISOLATED SHOWERS. '
      'WEDNESDAY'
      'EAST NORTHEAST WINDS 12 TO 15 KNOTS. SEAS 3 TO 4 FEET.'
      'HAZE. ISOLATED SHOWERS. '
      'WEDNESDAY NIGHT'
      'EAST NORTHEAST WINDS 12 TO 15 KNOTS. SEAS 3 TO'
      '4 FEET. HAZE IN THE EVENING. SCATTERED SHOWERS THROUGH THE NIGHT. '
      'THURSDAY'
      'EAST WINDS 8 TO 13 KNOTS. SEAS 2 TO 4 FEET. ISOLATED'
      'SHOWERS. '
      'FRIDAY'
      'EAST SOUTHEAST WINDS 11 TO 16 KNOTS. SEAS 3 TO 5 FEET.'
      'ISOLATED SHOWERS. '
      'SATURDAY'
      'EAST WINDS 13 TO 18 KNOTS. SEAS 4 TO 6 FEET. ISOLATED'
      'SHOWERS. '
      [1x165 char]
I want to generate an "if" statement that takes certain lines to display it on  the Command Window. For example,

if (the text line starts with 'REST... display the lines:

 'REST OF TONIGHT'
    'EAST WINDS 12 TO 16 KNOTS. SEAS 3 TO 4 FEET.'
    'ISOLATED SHOWERS.'

Thank you for your time.

JJR

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Juan Rosado 2012-7-10

Jan, my humble apologies. Thank you for the pointer, it won't happen again.

Jan 2012-7-15

编辑：Jan 2012-7-15

Dear Juan, there is no reason for apologies. Simply edit the question and format the code. This does not help me, but it improves your chances to get a useful answer.

Or you could wait until Walter formats your code. Thanks, Walter!

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Answer 1

Jan 2012-7-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43171-if-statement-for-text-files#answer_53073

在 MATLAB Online 中打开

index = find(strncmpi(out, 'Rest', 4));
fprintf('%s\n', out{index + 1});

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Answer 2

Andrei Bobrov 2012-7-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43171-if-statement-for-text-files#answer_53075

编辑：Andrei Bobrov 2012-7-10

在 MATLAB Online 中打开

[S,S] = weekday(now + (0:6),'long')
i1 = strncmp(out,'REST',4)
idx = i1 | ismember(out,cellstr(upper(S)));
I = cumsum(idx);
out2 = out(I(i1) == I);

or

[S,S] = weekday(now + (0:6),'long')
i1 = find(strncmp(out,'REST',4));
i2 = find(ismember(out,cellstr(upper(S))));
out3 = out(i1:i2(find(i1 < i2,1,'first'))-1);