And we're calculating the area under the curve, all right?

我们正在计算曲线下的面积，好吗？

It tells you the area under the curve up to x.

它告诉您曲线下的面积直到 x。

So once again, that number represents the area under the curve here, this area under the curve.

所以再一次，这个数字代表这里曲线下的面积，曲线下的这个面积。

You have to figure out the area under the curve between two points, right?

您必须计算出两点之间曲线下的面积，对吗？

So this is your T-value you would get, and then you essentially figure out the area under the curve right over there.

所以这是你会得到的 T 值，然后你基本上可以计算出曲线下方的面积。

If I say exactly 0, the probability is 0, because-- I shouldn't use 0 too much-- because the area under the curve just under 0-- there's no area.

如果我说正好是 0， 概率就是 0，因为——我不应该过多地使用 0——因为曲线下的面积刚好低于 0——没有面积。

So when you go to 5, and you just go right over here, this essentially tells you this area under the curve-- the probability that you're less than or equal to 5.

所以当你走到 5 的时候， 你就走到这里，这基本上告诉你曲线下的这个区域——你小于或等于 5 的概率。

If you wanna know how much of a particular sine wave is in a signal, just multiply the signal by the sine wave at each point and then add up the area under the curve.

如果您想知道信号中有多少特定正弦波，只需将信号乘以每个点的正弦波， 然后将曲线下的面积相加即可。

Now so far I've only talked about sine waves but if the signal is a cosine wave, then even if you multiply it by a sine wave of the exact same frequency, the area under the curve will be zero.

到目前为止， 我只讨论了正弦波， 但如果信号是余弦波，那么即使将其乘以完全相同频率的正弦波，曲线下的面积也将为零。