Data printing on one line instead of multiple lines

Question

Marios Christofides 2020-7-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/559904-data-printing-on-one-line-instead-of-multiple-lines

评论： Marios Christofides 2020-7-5

I'm trying to have my data print on seperate lines. Example would be 1 2 3 and then new line 4 5 6. My data is printing in sets of three but on the same line. The out put looks like this.

Heres my code

fprintf(1,'%s\t\t%s\t\t\t%s\t\t%s\n', 'Time','X','Y','Z')
for i = 1:1:12
    %Forward Euler Method
    x1 = xi + dt*(a*xi*(1 - xi/20) - b*xi*yi - c*xi*zi);
    y1 = yi + dt*(yi*(1-yi/25) - a*xi*yi - d*yi*zi);
    z1 = zi + dt*(b*zi*(1-zi/30) - xi*zi - yi*zi);
    xi = x1;
    yi = y1;
    zi = z1;
    data = [xi, yi, zi];
    fprintf(1, '\t%d\t%06f\t%12.5E\t%.2f\n\n', data);
end

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Johannes Fischer 2020-7-5

The second fprintf expects 4 values, 'data' only has 3.

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Answer 1

dpb 2020-7-5

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As Johannes pointed out, you forgot to output the time (and calculate it, too, for that matter... :) )

...
t=0.0;          % initialize the time value
for i=1:12
  t=t+dt;       % update time
  ...
  fprintf(1, '\t%d\t%06f\t%12.5E\t%.2f\n\n', [t, xi, yi, zi]);  % don't need to build data explicitly
end