Matlab的：fprintf中OUPUTS两次和不完全出于某种原因

这里是从我的代码的提取物，其中我使用fprintf中写结果到命令窗口：Matlab的：fprintf中OUPUTS两次和不完全出于某种原因

... 
hold off; 
X_H2S = (F_H2S_0-F_H2S)/F_H2S_0; 
X_COS = (F_COS_0-F_COS)/F_COS_0; 
X_CS2 = (F_CS2_0-F_CS2)/F_CS2_0; 
plot(W,X_H2S,W,X_COS,W,X_CS2) 

fprintf('\nFinal conversions (percent):\n\t\tH2S: %f\n\t\tCOS: %f\n\t\tCS2: %f\n\n',100*X_H2S(size(X_H2S)),100*X_COS(size(X_COS)),100*X_CS2(size(X_CS2))) 

fprintf('Pressure drop: %f to %f (%f percent)',P_0,P(size(P)),100*(P_0-P)/P_0) 


format longG 
%format compact 
length = size(fs, 2); 
...

出于某种原因，它输出如下：

Final conversions (percent): 
     H2S: 24.838056 
     COS: 0.000000 
     CS2: 99.997968 


Final conversions (percent): 
     H2S: 0.000000 
     COS: 98.985525 
     CS2: 0.000000 

Pressure drop: 129099.000000 to 128217.024848 (129099.000000 percent)Pressure drop: 0.000000 to 0.000000 (0.000000 percent)Pressure drop: 0.000000 to 0.000000 (0.000000 percent)Pressure drop: 0.000000 to 0.000002 (0.000003 percent)Pressure drop: 0.000005 to 0.000020 (0.000034 percent)Pressure drop: 0.000049 to 0.000196 (0.000343 percent)Pressure drop: 0.000490 to 0.001555 (0.002621 percent)Pressure drop: 0.003687 to 0.007620 (0.011556 percent)Pressure drop: 0.015495 to 0.019436 (0.030585 percent)Pressure drop: 0.041755 to 0.052945 (0.064154 percent)Pressure drop: 0.081088 to 0.098064 (0.115084 percent)Pressure drop: 0.132146 to 0.149250 (0.166397 percent)Pressure drop: 0.183585 to 0.200973 (0.218403 percent)Pressure drop: 0.235875 to 0.253389 (0.270943 percent)Pressure drop: 0.288536 to 0.310239 (0.331999 percent)Pressure drop: 0.353815 to 0.375693 (0.397640 percent)Pressure drop: 0.419669 to 0.445698 (0.471872 percent)Pressure drop: 0.498193 to 0.524642 (0.533730 percent)Pressure drop: 0.542828 to 0.551935 (0.561052 percent)Pressure drop: 0.570178 to 0.579314 (0.596511 percent)Pressure drop: 0.613741 to 0.631004 (0.648300 percent)Pressure drop: 0.665627 to 0.683177 (

任何想法为什么以及如何修复它？

来源

2015-10-06 Mierzen

在这两种情况下，你都在创建多个字符串，因为你的变量是数组。我还认为你的意思是删除过长的数字，查看这个'％f'语法，例如'％3.5f'在小数点前5位后给出3个数字。 – Adriaan

你的论点是向量。如果我这样做：

>> fprintf('Number: %f\n',rand(2,1)) 
Number: 0.957507 
Number: 0.964889

我观察到和你一样的行为。你认为你只打印出一个的原因是因为你调用size，但size返回一个1x2的数组，分别包含数组中的行数和列数。

来源

2015-10-06 21:02:33 pragmatist1

啊，谢谢！因此，我将使用行计数来检查 – Mierzen

修复它。谢谢！ – Mierzen

它取决于您提供给fprintf函数的值。看到这个输出：

>> fprintf('\nFinal conversions (percent):\n\t\tH2S: %f\n\t\tCOS: %f\n\t\tCS2: %f\n\n',[1,1],[1,1],[1,1]) 

Final conversions (percent): 
     H2S: 1.000000 
     COS: 1.000000 
     CS2: 1.000000 


Final conversions (percent): 
     H2S: 1.000000 
     COS: 1.000000 
     CS2: 1.000000

来源

2015-10-06 21:06:43

Matlab的：fprintf中OUPUTS两次和不完全出于某种原因

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