variable argument parameter的区别

68815442022-10-04 11:39:541条回答

variable argument parameter的区别
在计算机科学中这几个词有什么区别?

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hhx792 共回答了13个问题 | 采纳率76.9%
variable是变量
parameter是参数
argument的含义和他们的关系如下
1.An independent variable.独立变量.
2.Any value of an independent variable,e.g.,a search key; a number identify- ing the location of an itemin a table.| 独立变量的任何值.例如一个搜索(关)键(字),标识表中一个项(目)的位置的数.
3.A parameter passed between a calling and a called program.| 在调用程序和被调用程序之间传送的参数.
4.In PL/1,an expression and argument list that is part of a procedure reference.| PL/1语言中的一个表达式及自变量表,是过程参照的一部分.
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比如 the changeable weather
variable多样性的
比如 the variable food
英语翻译A basic solution is one in which only m+1 variable(inclu
英语翻译
A basic solution is one in which only m+1 variable(including x0) are considered in (1),the remainder being set equal to zero ;
basic solution 是线性代数中“基解”的意思
不想天鹅的癞蛤蟆1年前1
soclose 共回答了23个问题 | 采纳率82.6%
基解就是这样的解,其中m+1个变量(包括x0)受(1)的约束,其余的为0.
random variable X is normally distributed,with a mean of 25
random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.
Which of the following is cloest to the inter-quartile range for this distribution?
A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24
stevenlee301年前3
lewis49 共回答了18个问题 | 采纳率94.4%
随机变量x是通常分布的,其平均数为25,标准差是4,下面哪一个最接近这个分布的四分位数区间?
mean是平均数,是一组数据的总数量除以这组数据的总份数所得的商,standard deviation是标准差,是各个数据与平均数之差的平方的平均数的算术平方根.inter-quartile range 是四分位差,它是上四分位数(QL)与下四分位数(QU)之差.这道题目应该是选择A,希望我能帮助你解疑释惑.
谁能帮忙看下C supports functions that take a variable number of ar
谁能帮忙看下
C supports functions that take a variable number of arguments.
The va_* family of macros,defined in the standard header file ,provide
a portable way for a function to examine its arguments.Read the man pages for
stdarg(3) to learn how these work.
A common use of variable arguments is to create printf-like functions.Create a
function ’write to log,’ which is described below:
#include
#include
int loglevel;
/* If _loglevel is >= loglevel,act as if printf(format,...)
* had been called,passing all received arguments.
* Return the number of characters printed.
*/
int write_to_log(int _loglevel,const char *format,...)
{
#include "log-solution.c"
}
int
main()
{
loglevel = 2;
write_to_log(3,"Log works like printf:%s %d %cn","a string",42,’x’);
write_to_log(1,"This should not appear","a string",42,’x’);
return 0;
那个log-solution.c应该怎么写?
vvww31年前1
jinzhenzhen 共回答了27个问题 | 采纳率85.2%
靠,我前段时间还写了一个呢.给你参考下.
#include "MyLog.h"
#ifdef ANDROID
//nothing to do.
#else
#include
#include
void _info(const char *fmt ...)
{
va_list args;
va_start (args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
}
void _warning(const char *fmt ...)
{
va_list args;
va_start (args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
}
void _debug(const char *fmt ...)
{
va_list args;
va_start (args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
}
void _error(const char *fmt ...)
{
va_list args;
va_start (args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
}
#endif
? At compilation "y" was determined to be variable. As a var
? At compilation "y" was determined to be variable. As a variable, it is uninitialized
这个该怎么解决呢,我下午也是这样,可是晚上回来就好了.可是又改动了一下.m文件就又出现这个错误了.
asa00761年前1
残阳弦月 共回答了16个问题 | 采纳率93.8%
y在编译时被确定为可变的变量
作为变量,它未被初始化
这是这段话的意思.你根据其含义找问题吧.
谁可以举例解释explanatory variable 和response variable
谁可以举例解释explanatory variable 和response variable
统计学的英语词汇
口合哈口合1年前1
匍匐前进的老狼 共回答了15个问题 | 采纳率86.7%
explanatory variable:
response variable:应变量
比如“消费支出”受“收入”的影响,“收入”就是解释变量,“消费支出”就是应变量
泊松分布的一道题目Let X be a poisson random variable with mean equal
泊松分布的一道题目
Let X be a poisson random variable with mean equal to 10.find E[X^2]
该如何求?
shyjerry1年前2
加州旅人 共回答了14个问题 | 采纳率100%
For Poisson variable X,we know that E{X}=λ and Var{X}=λ too.
Therefore,E{X^2} = Var{X}+(E{X})^2 = 10+10^2 = 110.
LINGO里面explicit variable
LINGO里面explicit variable

rror code 42:text:explicit variable in set condition for set:PAIRS
turn99871年前1
大四的恋爱 共回答了16个问题 | 采纳率87.5%
&2 #gt# &1
英语翻译By default,SPSS assigns variable names and formats to al
英语翻译
By default,SPSS assigns variable names and formats to all variables in the
SPSS data file.By default,variables are named VAR##### (prefix VAR followed
by five digits) and all values are valid (blanks are assigned systemmissing
values).
一抹浅绿1年前1
fenglei_118 共回答了18个问题 | 采纳率66.7%
默认方式,SPSS命令会分配一个变量名和格式到所有在SPSS数据文件中的变量.默认方式,变量被命名为VAR####(VAR前缀后接五位数)且所有的变量都是有效的(空格将被赋值为系统缺失值).
一道微观经济学的垄断题目.垄断企业需求函数 Q=50-P利益最大化考虑平均可变成本函数 Average variable
一道微观经济学的垄断题目.
垄断企业需求函数 Q=50-P
利益最大化考虑
平均可变成本函数 Average variable cost=Q+6
利益=200
求:固定成本
zchl5211年前1
deepbluesoft 共回答了21个问题 | 采纳率90.5%
我是这么做的:
总收益=(50-Q) ×Q 固定成本为FC
总成本= Q×(Q+6) + FC
边际收益=50-2Q 边际成本=2Q+6
收益最大化即 50-2Q=2Q+6 所以Q=11
所以总收益为(50-11)×11=429
因为收益 200=429-11×(11+6)-FC 所以 FC=42
你看看对不对
main variable of interest翻译
main variable of interest翻译
我翻译成重要的主要变量。interest有重要性的意思,不知道对不对
yang向东1年前4
靓丽晶晶 共回答了15个问题 | 采纳率86.7%
仅供参考:根据上下文的不同,可以翻译成:影响利息(利益,兴趣)变化的主要因素。 interest在这里可以理解成利息,利益,兴趣等,取决于上下文。
WACC财务问题A project has a unit price of $74,a variable cost pe
WACC财务问题
A project has a unit price of $74,a variable cost per unit of $40,fixed costs of
$5,500.The project requires an initial investment of $8,000 and will be depreciated to
an expected salvage of zero over 4 years.The required return is 8% and ignore the
effect of taxes.What is the accounting break-even quantity,cash break-even quantity,
and financial break-even quantity?What is the degree of operating leverage at the
financial break-even level of output?
kzi1d1年前1
金小强 共回答了19个问题 | 采纳率94.7%
accounting break-even quantity
(74-40)*Q - 8000/4 - 5500 = 0
Q=220.59
cash break-even quantity
(74-40)*Q - 5500 = 0
Q=161.76
financial break-even quantity
(74-40)*Q*(P/A,4,8%) - 5500*(P/A,4,8%) - 8000 = 0
Q=232.80
DOL=(S-C)/(S-C-F)=34Q/(34Q-5500)=3.28
The probability density function of a random variable X is f
The probability density function of a random variable X is f(X)
(a)show that E(aX+b)=aE(X)+b
(b)Var(aX+b)=a^2Var(X)
(c)Var(X)=E(X^2)-{E(X)}^2
vv的傲雪1年前2
herozhou1985 共回答了21个问题 | 采纳率85.7%
(a):Proof:E[aX+b] = Sum pi(axi +b)
= Sum (pi (axi) + pi (b))
= Sum (pi axi)+ Sum ( pi b)
= aSum (pi xi)+ bSum ( pi),Sum( pi) = 1,所以 Sumaxi = aSxi
= aE[X] + b
(b) Proof:
Var(X) = E([X-E(X)]2
= E(X^2)-2XE(X) + E(X)^2,x=E(x)
= E(X^2) -2E(X)E(X) + E(X)^2
= E(X^2)-E(X)^2
(c)
Proof:Var[aX+b]
= E([(aX + b)- E(aX + b)]^2)
= (a^2E[X^2] + 2abE[X] +b^2) – (a^2E[X]^2+2abE[X]+b^2)
= a^2E[X^2] - a^2E[X]^2
= a^2(E[X^2] - E[X]^2)
= a^2Var[X]
在线等Categorical variable分类变量(类别变量)和Continuous variable数字变量,各举
在线等Categorical variable分类变量(类别变量)和Continuous variable数字变量,各举一个例子
是要很具体的一个例子 不是这么笼统的还有Proportional versus和Disproportional sample也各需要1个例子
tai1236987451年前1
hunya 共回答了14个问题 | 采纳率92.9%
分类变量是水平变量,例如我设置了三个水平的农药浓度
数值变量是连续性的,一般就是测量的数据,例如株高,叶数等
至于什么是dependent,什么是independent,就看你把谁作为纵坐标了,你要看农药水平下的株高,株高就是dependent,农药量就是independent;而如果你要看不同株高下的叶片数,那么株高就是independent,而叶数才是dependent
gre A random variable Y is normally distributed with a mean
gre
A random variable Y is normally distributed with a mean of 200 and a standard deviation of 10.比较 the probability of the event that the value of Y is greater than 220,与 1/6.
hanfan3331年前2
shhou 共回答了23个问题 | 采纳率91.3%
平均值是200,又是正态分布,所以记住在190--210的概率为68%,在180--220的概率为大约95%,在170--230的概率大约为99.7% .因为正态分布曲线两边堆成可以得到大于220的概率为1-(50%+95%/2)
英语翻译The diminishing returns of a variable input will account
英语翻译
The diminishing returns of a variable input will account for:
chouxiaoya0051年前1
鞠躬惊啐 共回答了26个问题 | 采纳率88.5%
正确答案是报酬递减的可变投入将占
大学统计Let X be a Poisson random variable with parameter λ. The
大学统计
Let X be a Poisson random variable with parameter λ. Then
P(X=x|λ)= λ^x*e^−λ/x! . Suppose we take an iid sample (X1, . . . , Xn) from this distribution. We find X ̄ = 2.
(a) Show that X ̄ is a sufficient statistic. (b) Suppose λ may take any value in [0, ∞). What is the maximum likelihood estimate of
λ?
(c) Suppose λ may take any value in [0, 1]. What is the maximum likelihood estimate of λ?
(d) Suppose λ has a uniform prior distribution on [0, 1]. What is the mean of the posterior distribution? (Note: You may leave an integral in your answer.)
whf93971年前1
zhuchengbing 共回答了17个问题 | 采纳率88.2%
好题
英语翻译A variable noun is a noun that can be countable or uncou
英语翻译
A variable noun is a noun that can be countable or uncountable and can be used with or without an article in the singular form.
With an article the noun can be general,whereas with an article it can be specific.
eg.
I like salad (no article,uncountable and general)
I will have salad for lunch (with article,countable and specific)
Hope this all makes sense
事了拂衣深藏身名1年前1
暖暖34940081 共回答了18个问题 | 采纳率88.9%
可变数名词指的是可以可数也可以不可数,单数时冠词可有可无的名词.
带冠词,此种名词可为泛指.然而也可能是特指.
譬如:我喜欢沙拉(无冠词,不可数,泛指.)
我中午饭吃沙拉(带冠词,可数,特质)——这句哪有冠词啊?
愿能助你.
……你那些词不懂啊?没说.
lingo程序的错误:unable to solve for fixed variable 怎么改正?
lingo程序的错误:unable to solve for fixed variable 怎么改正?
sets:
machine/1..8/:total;
line/1..6/:actual;
link(machine,line):value;
endsets
data:
total=150,79,180,99.5,125,140,95,113.9;
value=
0.083-0.055-0.07-0.03500.238
0.0480.1280.061-0.1030.242-0.061
0.0530-0.1570.205-0.065-0.078
0.120.033-0.012-0.021-0.0410.093
-0.0250.0870.124-0.012-0.0660.047
0.122-0.11300.0060.0690
0.121-0.01900.14500.166
00.099-0.2020.076-0.010;
enddata
@for(line(i):actual(i)=@sum(machine(j):value(j,i)*total(j)));
雨后清晨1年前1
在ii自 共回答了12个问题 | 采纳率91.7%
value的数据写的不对 请将数据用空格或者逗号隔开 你这写的说实话人都看不懂 别说软件了
What is the variable margin or gross margin of the above pro
What is the variable margin or gross margin of the above product grouping or market segment?怎么翻
lolita8181年前3
屈光外科医生 共回答了11个问题 | 采纳率100%
以上产品组合或市场部门的毛利或是追加保证金是多少?
.好别扭,如此专业的词汇
variable margin追加保证金
gross margin 毛利
grouping编组,或者分类
market segment.市场部门,不是市场分割.
生物实验中categoric variable,discrete variable,continuous variabl
生物实验中categoric variable,discrete variable,continuous variable分别是什么意思
剑吟天下1年前2
大坏球 共回答了17个问题 | 采纳率76.5%
categoric variable分类变量
discrete variable 离散变量
continuous variable连续变量
什么是连续性随机变量,continuously distributed random variable是不是就是连续性随
什么是连续性随机变量,continuously distributed random variable是不是就是连续性随机变量
tiy8482969891年前1
Irenemin 共回答了17个问题 | 采纳率100%
若X是随机变量,其分布函数为F(x),如果存在非负函数p(x),使得对于任意在实数R上的x有F(x)=p(t)在负无穷到x上的积分(不好意思,由于WORD版本的问题,无法用积分号表示,见谅),则称X是连续型随机变量,而p(x)称为X的概率密度函数,简称密度函数.continuously distributed random variable是连续性随机变量.
英语翻译Let x and y be related variable quantities,and let x = a
英语翻译
Let x and y be related variable quantities,and let x = a and y = b be values
they assume,near which y is a function of x—each value of x near a determines a
value of y near b.Then x−a and y −b are also variable quantities as is their ratio.
Euler insists that although x − a and y − b are both zero when x is a,their ratio
has,or at any rate can have,a value when x = a.
流水恋1年前2
edko 共回答了14个问题 | 采纳率85.7%
设x和y为相关变量,令x=a、y=b为它们所取的值、在此值附近y是x的函数--即每个在a附近的x值都确定一个b附近的y值,那么x-a和y-b也是变量、它们的比也是.欧拉指出:当x是a时,尽管x-a和x-b均为0,但它们的比(或任何可能的比)在x=a时具有值.
A random variable X has mean μ = 9 and a standard deviation
A random variable X has mean μ = 9 and a standard deviation σ = 2.The random variable X is multiplied by the constant 3 to create a new variable Y,i.e.,Y = 3X.What is the variance of
器皿1年前1
淘气小樱桃 共回答了26个问题 | 采纳率69.2%
3^2 *4=36
standard deviation 这个是标准差 variance 这个是方差 方差=标准差的平方
X的方差是2^2=4
所以 Y的方差是3^2*4=36
用示波器进行幅度测量或频率测量时,VARIABLE应置于什么位置?
庸俗浪人1年前1
发克优 共回答了20个问题 | 采纳率90%
先用示波器测量一下探头校准信号,因为探头校准信号的频率、幅度一般都是知道的(1kHz、3v),然后调节粗调时基,可以用500us|div,这样一个周期就是两格,然后调节微调使其正好是两个格.电压档可以用1v|div