c*******d
发帖数: 29 | 1 找了好久终于发现如果在Lyx的数学环境中直接输入\pmatrix 然后空格可以使用，但是
在菜单里面就是找不到，难道这是唯一的方法？ |
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a**a
发帖数: 416 | 2 yes. LyX supports most mathematical LaTeX commands. But if you don't know \
pmatrix, you can always input [] by gui. Command input is assumed for
advanced users. |
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z**********n
发帖数: 3 | 3 #include
#include
using namespace std;
class Matrix
{
public:
Matrix(int r, int c)
{
pData = new int[r * c];
_rowNum = r;
_colNum = c;
}
// TODO pData is a pointer, so deep copy struct is needed
// TODO write copy structor and assign operateo
//Matrix(Matrix& m)
//{
//}
//Matrix& operator = (Matrix& m)
//{
//}
void SetNum(int r, int c, int num)
{
pData[r * _colNum + c] = num;
}
const i... 阅读全帖 |
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s*******s
发帖数: 1568 | 4 写了个R程序，
n = 100
m = 5
p = 0.5
v1= 0:n
s0=dbinom(v1,n,p)
Pmatrix = matrix(0, nrow = n+1, ncol = n+1)
for (i in 0:n) {
v1 = 0:i
Pmatrix[i+1,1:(i+1)] = dbinom(v1,i,p)
}
for (i in 1:m) {
s0=s0%*%Pmatrix
}
E = 0;
for (i in 0:n) {
E = E + s0[i+1]*i
}
print(E) |
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g****g
发帖数: 1828 | 5 In probability theory, the normal (or Gaussian) distribution, is a
continuous probability distribution that is often used as a first
approximation to describe real-valued random variables that tend to cluster
around a single mean value. The graph of the associated probability density
function is “bell”-shaped, and is known as the Gaussian function or bell
curve:[nb 1]
f(x) = \tfrac{1}{\sqrt{2\pi\sigma^2}}\; e^{ -\frac{(x-\mu)^2}{2\sigma^2}
},
where parameter μ is the mean (location of the pe... 阅读全帖 |
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L******r
发帖数: 199 | 6 Tex如下，每次标号都另起一行，很讨厌，如何把公式和标号放进同一行中？
\begin{equation}\label{example}
\textit{\textbf{X}} =
\begin{pmatrix}
&c_1 & c_2 &c_3& \cdots &c_m\\
d_1 & 8 & 0 & 1& \cdots & 7\\
d_2 & 13 & 6 & 0& \cdots &6\\
d_3 & 1 & 0 & 0& \cdots &4\\
\cdots & \cdots & \cdots & \cdots & \ddots &\cdots\\
d_n & 3 & 10 & 0 & \cdots &1\\
\end{pmatrix}
\end{equation} |
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a**e
发帖数: 5794 | 7 \documentclass{article}
\usepackage{booktabs,multirow,warpcol}
\usepackage{amsmath}
\begin{document}
\begin{tabular}{ccP{1.4}P{1.4}P{1.4}}
\toprule\toprule
& & \multicolumn{3}{c}{Correlation($\rho$)} \\
\cmidrule{3-5}
$\theta$ & Variances ($\sigma_{11},\sigma_{22}$) & 0 & .4 & .9 \\
\midrule
\multirow{4}{*}{\centering
$\begin{pmatrix}
1 \\ 0 \\
\end{pmatrix}$
} & (.1,.1) & .0138 & .0141 & .0131 \\
& (.1,.5) & .0059 & .0064 & .008 \\ |
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X*7
发帖数: 40 | 8 谢了，但是我不太明白您给的提示，比如矩阵是这样的
begin{pmatrix}
frac{frac{1}{2tau^4}}{frac{1}{2tau^4} frac{tr[WVWV]}{2tau^4}-left (frac{tr[
WV]}{2tau^4}right )^2}&frac{-frac{1}{2tau^4}tr[WV]}{frac{1}{2tau^4} frac{tr[
WVWV]}{2tau^4}-left (frac{tr[WV]}{2tau^4}right )^2}&text{Huge{0}} \
frac{-frac{1}{2tau^4}tr[WV]}{frac{1}{2tau^4} frac{tr[WVWV]}{2tau^4}-left (
frac{tr[WV]}{2tau^4}right )^2}&frac{frac{1}{2tau^4}tr[WVWV]}{frac{1}{2tau^4}
frac{tr[WVWV]}{2tau^4}-left (frac{tr[WV]}{2tau^4}right )^2}&text{Huge{0}}\
text{Huge{0}... 阅读全帖 |
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B*B
发帖数: 87 | 10 我写下一个超长的矩阵，latex以后dvi只能显示前半部分，
后面就不显示了，也不换行。
我想让latex把矩阵横过来，这样可能可以显示，不知道应该怎么做。
或者可以缩小点字体，让公式变短点？也不知道该怎么做。
或者高人知道还有别的方法怎么解决这个超长公式的显示问题。
谢谢！
我的代码如下
\begin{equation}
\begin{pmatrix}
P^2_{g}+P^2_{b}+(1-w)(1-\frac{N+1}{N}w)P^2_{ig}+2P_{b}P_{g}+(2-\frac{2N+1}{N
}w)P_{g}P_{ig}+(2-\frac{2N+1}{N}w)P_{b}P_{ig} & (2N+1)wP^2_{b}-(1-w)\frac{N+
1}{N}wP^2_{ig}+(2N+1)wP_{b}P_{g} & [(N^2+N)w^2-Nw]P^2_{b}-NwP_{b}P_{g}-NwP_{
b}P_{ig} & [(N+1)w^2-w]P^2_{b}-wP_{b}P_{g}-wP_{b}P_{ig} \\ %(s1 s2 s3 s4)
(1-w)wP^2_{ig}+ |
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