Multiple lines with fprintf

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Cole Rasmussen 2020-4-3

1
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https://ww2.mathworks.cn/matlabcentral/answers/515171-multiple-lines-with-fprintf

评论： dpb 2020-4-3

Hello, so I have a simple question, how do I make multiple lines with fprintf and not mess up the output? I tried making this code into multpile lines using fprintf:

for n=1:num
    rowNum = rowNum + 1;
    row = finalExp(rowNum, :);
    scoreCheck1 = row(:, 3);
    scoreCheck2 = row(:, 4);
    if scoreCheck1 < scoreCheck2
        fprintf('%02.0f/%02.0f  %02.0f-%02.0f  L  %1.0f   %2.0f   %2.0f    %1.0f   %5.3f\n', ...
            row)
    else
        fprintf('%02.0f/%02.0f  %02.0f-%02.0f  W  %1.0f   %2.0f   %2.0f    %1.0f   %5.3f\n', ...
            row)
    end
end

but whenever I make the fprintf part a line down (between the %2.0f and the %1.0f) it messes up the output.

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Cole Rasmussen 2020-4-3

在 MATLAB Online 中打开

Sorry about that Adam Danz, here is the entire segment of code if you want to see it. I added the file too. Don't fix my code though, because this is homework and I don't want to cheat, only pay attention to the fprintf part that I mentioned in the question. Also the code is a function so I put it in two different scripts.

FILENAME = 'AU_SB_2020_08.txt';
% ***** INPUT *****
% open data file
[fid, msg] = fopen(FILENAME, 'r'); 
% does file exist?
if fid <= 0
    fprintf( 'File not available\n' )
else
    % file exist continue
    help legend
    [month, day, sc1, sc2, s1, s2, s3, s4] = textread(FILENAME, ...
        '%f%f%*s%*s%f%f%f%f%f%f');
    date = [month, day];
    scores = [sc1, sc2];
    stats = [s1, s2, s3, s4];
    
    reportGraph(date, scores, stats)
    fclose(fid);
end

Here is the function

function [] = reportGraph(date, scores, stats)
% User defined function to print the report and the plot 
month = date(:, 1);
day = date(:, 2);
s1 = stats(:, 1);
s2 = stats(:, 2);
s3 = stats(:, 3);
s4 = stats(:, 4);
sc1 = scores(:, 1);
sc2 = scores(:, 2);
batAve = (s3 ./ s1);
aveRound = round(batAve, 3);
final = [month, day, sc1, sc2, s1, s2, s3, s4, aveRound];
num = length(final);
rowNum = 0;
sc1Ave = mean(sc1);
sc2Ave = mean(sc2);
s1Ave = mean(s1);
s2Ave = mean(s2);
s3Ave = mean(s3);
s4Ave = mean(s4);
aveAve = mean(aveRound);
ave = [sc1Ave, sc2Ave, s1Ave, s2Ave, s3Ave, s4Ave, aveAve];
fprintf('2020 AU Softball Batting Stats as of 03/01\n')
fprintf('Date   Score W/L  AB Runs Hits HRuns  Ave\n')
for n=1:num
    rowNum = rowNum + 1;
    row = final(rowNum, :);
    scoreCheck1 = row(:, 3);
    scoreCheck2 = row(:, 4);
    if scoreCheck1 < scoreCheck2
        fprintf('%02.0f/%02.0f  %02.0f-%02.0f  L  %1.0f   %2.0f   %2.0f    %1.0f   %5.3f\n', ...
            row)
    else
        fprintf('%02.0f/%02.0f  %02.0f-%02.0f  W  %1.0f   %2.0f   %2.0f    %1.0f   %5.3f\n', ...
            row)
    end
end
fprintf('Ave: %04.1f-%04.1f  %4.1f  %3.1f  %3.1f  %3.1f  %5.3f\n', ave)
end

Adam Danz 2020-4-3

You may want to consider whether it's really necessary to print the help-info on the legend function every time you run the script.

dpb 2020-4-3

在 MATLAB Online 中打开

NB: You can use the vectorized operations of MATLAB to good effect...

s1 = stats(:, 1);
s2 = stats(:, 2);
s3 = stats(:, 3);
s4 = stats(:, 4);
sc1 = scores(:, 1);
sc2 = scores(:, 2);
batAve = (s3 ./ s1);
aveRound = round(batAve, 3);
...
sc1Ave = mean(sc1);
sc2Ave = mean(sc2);
s1Ave = mean(s1);
s2Ave = mean(s2);
s3Ave = mean(s3);
s4Ave = mean(s4);
aveAve = mean(aveRound);
ave = [sc1Ave, sc2Ave, s1Ave, s2Ave, s3Ave, s4Ave, aveAve];
...

can be simply

batAve = round(stats(:,3)./stats(:,1), 3);
ave=[mean(scores) mean(stats) mean(batAve)];

As general coding principal, avoid creating additional variables that are named sequentially--use the array indices instead to reference specific columns/rows and the vectorized abilities in ML to do operations over arrays/matrices. It's the power and reason for there being MATrixLABoratory.

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