How to change data and display a text using cell arrays.

Question

Juan Rosado 2012-7-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42489-how-to-change-data-and-display-a-text-using-cell-arrays

Greetings,

The program I'm developing takes the html code from an internet forecasting page, ignores all the html tags and stores the text on MATLAB as a cell array.

The problem is I can't get to replace some quotation marks I keep getting in the Output.

The program goes like this:

clc,clear;

urlwrite('http://weather.noaa.gov/cgi-bin/fmtbltn.pl?file=forecasts/marine/coastal/am/amz722.txt','Anegada_Passage_Southward.txt');

fid=fopen('Anegada_Passage_Southward.txt');

y=fgetl(fid);

data = textscan( fid, '%s', 'Delimiter', ''); %read the entire file as strings, one per line.

out = regexprep( data{1}, '<[^>]+>', '' ); %remove the HTML

for i=1:1:36

    if out{i}=='';
        setfield(out,{i},'');
    else
        getfield(out,{i});
    end
end
fclose(fid);

On the 'if' part I keep geeting this Error:

Error using ==> eq Matrix dimensions must agree.

Error in ==> pru at 12 if out{i}=='';

I want to repace those '' with empty lines to divide paragraphs.

What can I do?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

per isakson 2012-7-1

Move "fclose(fid);" to directly after textscan. You don't want to keep the file open longer than necessary, since it may cause problems during debugging.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

per isakson 2012-7-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42489-how-to-change-data-and-display-a-text-using-cell-arrays#answer_52279

在 MATLAB Online 中打开

The variable, out, is a cell array of strings. The functions, setfield and getfield, operate on structure arrays.

Replace the for-loop by

    for ii = 1:1:36
        if isempty( out{ii} )
            out{ii} = []; % or do nothing 
        else
            disp( out{ii} )
        end
    end