-
We could just collect a bunch of data. For a material .What's the volume it occupies at some pressure and temperature?
对一种物质我们可以得到一系列测量数据,在给定的温度和气压下,它的体积是什么？
-
int So, primitive type besides those three types, we have ints which are just integers which are similarly 32 bits.
除了这三种类型外，还有一种最原始的数据类型,32比特整数。
-
If you go onto the continent,though, they tended to be interrupted by World War I and World War II.
如果你们往欧洲大陆国家那里考虑,一战和二战期间的数据几乎是没有存档的
-
The semantics was what caused the problem, because the operator was expecting a particular kind of structure there.
引起问题的是语义，因为运算符需要的是,一种特定种类的数据结构。
-
For example, one of the statistics when I talk to people about the youth online with the study that was done years ago, where they said 1/4 teenager girls had received unwelcome sexual advances on the Internet.
例如，我通过与人们交谈获得一个数据,是关于年轻人上网的一项研究,这一研究是很多年前进行的，研究显示他们称有1/4的十几岁的女孩子,在网络上受到不受欢迎的性挑逗。
-
John, let me give you one more, one other statistic During the last 7 years, the Bush presidency household debt has almost tripled.
约翰，我再给你一项数据,布什上台后的这7年里,家庭债务翻了三番。
-
Here's another graph of data on the metabolic syndrome showing how it differs by race and ethnicity.
这是另一幅关于代谢综合征的数据图,它表明代谢综合征在种族与民族间的差异
-
Microsoft Bob was kind of like a low end Word processor and spreadsheet but the screen look like a house and this dog walked around and talked to you about writing your book reports or something.
那是一款类似于,低端文档处理器和数据表,的产品，但是屏幕,看起来像个房子,还有狗走来走去和你对话，写书或者报告。
-
And one way we can get to that is by looking at two pieces of data.
一种可以得出答案的方法,就是观察2个数据。
-
I just wanted to show you this last graph, or this last set of statistics to go from causes of death in the U. S.
我想让你们看的最后一张图,或者说最后一组统计数据,不是关于美国人的死因
-
The figure you are quoting in New York times which came out of a report published by a French economist who lives in India John Kenneth. And the article was by Sangota, the New York Times editor.
你从纽约时报,某篇报道上摘下来的数据,出自一名住在印度的法国经济学家,之手，他叫约翰·克南斯,该文章由纽约时报的圣郭特所编辑。
-
Conceptually, it's put at the top of my chunk of RAM, -- below it, goes initialized and uninitialized data -- - this is a fancy way of saying global variables come next -- and below that, comes what's called the heap.
概念上，它放置在内存块的顶端，在下面，已初始化的和未初始化的数据-,这是一种指明紧随其后的全局变量的设想方式-,在后来，引入了一个叫做堆的东西。
-
So with an integer, an int data type, you can store any number between 0 and 4 billion roughly.
只要有一个整数，一个int型的数据，就能储存任意一个,位于0到40亿之间的一个数。
-
This is a type of number that we'll see in a bit.
这只是一种数据类型，不久后我们就会看到。
-
So I've got a way now of gathering data together.
那么现在我们学会了收集数据的一种方式。
-
He has data for a very long time period, 1802 to 2006, for the U.S.
他的数据是采用美国从1802年到2006年，相当长的一段时间。
-
Well, a cross-sectional study would mean that you'd get a random group of the population and measure them in 1970 and then take another random group five years later and measure them, but it wouldn't be the same people necessarily, it would be different groups of people.
那么,横断面研究就是,1970年你在人群中随意选择一组人,并记录下相关数据,然后,五年后再随意选择一组人记录数据,但这不需要是同一组人,通常是不同的人
-
You could take weights on people measured over a period of many years and look at the variability over time in weight and then link it to things like heart disease and cancer, and I'll come back later and talk about the results of that particular study.
我们还可以得到人们很长一段时间里,每年的体重数据,观察体重随着时间变化的变动,并将观察结果与心脏疾病和癌症联系起来,我等一下会告诉大家这项研究的结果
-
And the second thing we're going to need, is we're going to need a way to give instructions to the computer to manipulate that data.
我们需要的第二件事情是，我们需要一种,能给予计算机指令,以操作数据的方式。
-
String is actually not a data type in C. It actually is something called a char star and we'll come back to this before long.
字符串在C语言里其实不是一种数据类型,而是一种称为char，*的数据类型,这个知识点我以后会讲到。
-
So we're to assume we can get to any piece of data, any instruction in constant time, and the second assumption we're going to make is that the basic primitive steps take constant time, same amount of time to compute. Again, not completely true, but it's a good model, so arithmetic operations, comparisons, things of that sort, we're all going to assume are basically in that in that particular model.
因此如果我们假设在恒定的时间内,我们可以取得任何一块数据,任何一种数据结构的话,我们要做的第二个假设就是,基本的原始操作计算花费的时间是恒定的,这个假设也不是完全正确的，但这个模型其实挺不错的，因此算法操作，比较，这一类的事情，我们在这个特定的模型中都假设是基本的,操作，花费的时间是恒定相同的。
-
Associated with every data type in Python is a type, which identifies the kind of thing it is.
在Python中每种类型都对应着一种数据类型，类型确定了对象的种类。
-
As I said, I would prefer to do something that uses an accessor that I just wrote.
来完成这个操作,因此p，Cartesian是一种访问器,它可以访问里面的数据。
-
Sometimes the functions -- sometimes a function can be used on multiple data types, plus, for example, we saw could add strings, or could add ints, but each one of those data types has associated with it a set of functions that are geared to handling them.
比如说，我们可以对string类型,进行add操作,也可以对int类型进行这个操作，但是这些数据类型中的每一种，都与适合于操作它们的,方法集相关联,我们想对我们创建的数据,类型做同样的事情。
应用推荐