如果那么单线 [英] One-liner for if then

问题描述

MATLAB中是否有单行内容？

Is there a one-liner in MATLAB for this?

if a > b
    foo = 'r';
else
    foo = 'g';
end

推荐答案

不像C那么优雅样式三元运算符，但您可以利用matlab在这种情况下自动将逻辑转换为双精度的事实。因此，您可以根据您的条件（ a> b ）将您想要的结果乘以true（在这种情况下为 r ） ），并使用 not 条件将其添加到您想要的结果的产品中（即 g ）：

Not as elegant as a C style ternary operator but you can take advantage of the fact that matlab will automatically cast logicals into doubles in this situation. So you can just multiply your desired result for true (r in this case) by your condition (a > b), and add that to the product of your desired result for false (i.e. g) with the not of your condition:

foo = (a > b)*c + (~(a > b))*d

所以如果我们让 c ='r'和 d ='g'然后我们需要做的就是将 foo 转换回 char 最后：

so if we let c = 'r' and d = 'g' then all we need to do is cast foo back to a char at the end:

char(foo)

或

char((a > b)*'r' + ~(a > b)*'g')

请注意，这仅在<$ c时有效$ c> c 和 d 具有相同的尺寸（因为 + ）。 ..

Note that this will only work if c and d have the same dimensions (because of the +)...

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