首页 \ 问答 \ 如何并排显示数据(How to display the data side by side)

如何并排显示数据(How to display the data side by side)

我正在尝试使用最简单的代码并排显示数据。

问题是当数据丢失时,右侧没有正确float

怎么解决?

.pair {
  background-color: #ccc;
}
.pair dt {
  float: left;
  width: 90px;
  text-align: right;
  color: #999;
}
.pair dd {
  margin: 0 0 0 100px;
}
<dl class="pair">
  <dt>Date</dt>
  <dd>date goes here</dd>
  <dt>Country</dt>
  <dd>USA</dd>
  <dt>Age</dt>
  <dd></dd>
  <dt>Name</dt>
  <dd></dd>
  <dt>Other</dt>
  <dd>other info goes here</dd>
</dl>


I'm trying to display the data side by side using the most simple code possible.

The problem is when the data is missing, the right side doesn't float correctly.

How to fix it?

.pair {
  background-color: #ccc;
}
.pair dt {
  float: left;
  width: 90px;
  text-align: right;
  color: #999;
}
.pair dd {
  margin: 0 0 0 100px;
}
<dl class="pair">
  <dt>Date</dt>
  <dd>date goes here</dd>
  <dt>Country</dt>
  <dd>USA</dd>
  <dt>Age</dt>
  <dd></dd>
  <dt>Name</dt>
  <dd></dd>
  <dt>Other</dt>
  <dd>other info goes here</dd>
</dl>


原文:
更新时间:2022-03-15 13:03

最满意答案

使用armadillo.memptr()类成员函数,我们可以提取内存指针。 从这里,我们可以使用EigenMap<T>()构造函数来创建一个特征矩阵。

现在,我们可以使用.data()成员函数从Eigen矩阵中提取一个指向Eigen内存结构的点。 然后,使用arma::mat高级构造函数选项,我们可以创建一个armadillo 矩阵

例如:

#include <RcppArmadillo.h>
#include <RcppEigen.h>

// [[Rcpp::depends(RcppEigen)]]

// [[Rcpp::depends(RcppArmadillo)]]

// [[Rcpp::export]]
Eigen::MatrixXd example_cast_eigen(arma::mat arma_A) {

  Eigen::MatrixXd eigen_B = Eigen::Map<Eigen::MatrixXd>(arma_A.memptr(),
                                                        arma_A.n_rows,
                                                        arma_A.n_cols);

  return eigen_B;
}

// [[Rcpp::export]]
arma::mat example_cast_arma(Eigen::MatrixXd eigen_A) {

  arma::mat arma_B = arma::mat(eigen_A.data(), eigen_A.rows(), eigen_A.cols(),
                               false, false);

  return arma_B;
}

/***R
(x = matrix(1:4, ncol = 2))
example_cast_eigen(x)
example_cast_arma(x)
*/

结果:

(x = matrix(1:4, ncol = 2))
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

example_cast_eigen(x)
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

example_cast_arma(x)
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

快速说一句:如果您使用的是Eigen的映射函数,那么您应该自动对Armadillo矩阵进行更改(反之亦然),例如

#include <RcppArmadillo.h>
#include <RcppEigen.h>

// [[Rcpp::depends(RcppEigen)]]

// [[Rcpp::depends(RcppArmadillo)]]

// [[Rcpp::export]]
void map_update(Eigen::MatrixXd eigen_A) {

  Rcpp::Rcout << "Eigen Matrix on Entry: " << std::endl << eigen_A << std::endl;

  arma::mat arma_B = arma::mat(eigen_A.data(), eigen_A.rows(), eigen_A.cols(),
                               false, false);

  arma_B(0, 0) = 10;
  arma_B(1, 1) = 20;

  Rcpp::Rcout << "Armadill Matrix after modification: " << std::endl << arma_B << std::endl;

  Rcpp::Rcout << "Eigen Matrix after modification: " << std::endl << eigen_A << std::endl;
}

跑:

map_update(x)

输出:

Eigen Matrix on Entry: 
1 3
2 4

Armadill Matrix after modification: 
   10.0000    3.0000
    2.0000   20.0000

Eigen Matrix after modification: 
10  3
 2 20

Using armadillo's .memptr() class member function, we are able to extract the memory pointer. From here, we can use Eigen's Map<T>() constructor to create an Eigen matrix.

Now, we can go from the Eigen matrix using the .data() member function to extract a point to Eigen's memory structure. Then, using the advanced constructor options of arma::mat we can create an armadillo matrix.

For example:

#include <RcppArmadillo.h>
#include <RcppEigen.h>

// [[Rcpp::depends(RcppEigen)]]

// [[Rcpp::depends(RcppArmadillo)]]

// [[Rcpp::export]]
Eigen::MatrixXd example_cast_eigen(arma::mat arma_A) {

  Eigen::MatrixXd eigen_B = Eigen::Map<Eigen::MatrixXd>(arma_A.memptr(),
                                                        arma_A.n_rows,
                                                        arma_A.n_cols);

  return eigen_B;
}

// [[Rcpp::export]]
arma::mat example_cast_arma(Eigen::MatrixXd eigen_A) {

  arma::mat arma_B = arma::mat(eigen_A.data(), eigen_A.rows(), eigen_A.cols(),
                               false, false);

  return arma_B;
}

/***R
(x = matrix(1:4, ncol = 2))
example_cast_eigen(x)
example_cast_arma(x)
*/

Results:

(x = matrix(1:4, ncol = 2))
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

example_cast_eigen(x)
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

example_cast_arma(x)
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4

One quick remark: If you are using Eigen's Mapping function, then you should automatically have the change in the Armadillo matrix (and vice versa), e.g.

#include <RcppArmadillo.h>
#include <RcppEigen.h>

// [[Rcpp::depends(RcppEigen)]]

// [[Rcpp::depends(RcppArmadillo)]]

// [[Rcpp::export]]
void map_update(Eigen::MatrixXd eigen_A) {

  Rcpp::Rcout << "Eigen Matrix on Entry: " << std::endl << eigen_A << std::endl;

  arma::mat arma_B = arma::mat(eigen_A.data(), eigen_A.rows(), eigen_A.cols(),
                               false, false);

  arma_B(0, 0) = 10;
  arma_B(1, 1) = 20;

  Rcpp::Rcout << "Armadill Matrix after modification: " << std::endl << arma_B << std::endl;

  Rcpp::Rcout << "Eigen Matrix after modification: " << std::endl << eigen_A << std::endl;
}

Run:

map_update(x)

Output:

Eigen Matrix on Entry: 
1 3
2 4

Armadill Matrix after modification: 
   10.0000    3.0000
    2.0000   20.0000

Eigen Matrix after modification: 
10  3
 2 20

相关问答

更多

相关文章

更多

最新问答

更多
  • 如何在Laravel 5.2中使用paginate与关系?(How to use paginate with relationships in Laravel 5.2?)
  • linux的常用命令干什么用的
  • 由于有四个新控制器,Auth刀片是否有任何变化?(Are there any changes in Auth blades due to four new controllers?)
  • 如何交换返回集中的行?(How to swap rows in a return set?)
  • 在ios 7中的UITableView部分周围绘制边界线(draw borderline around UITableView section in ios 7)
  • 使用Boost.Spirit Qi和Lex时的空白队长(Whitespace skipper when using Boost.Spirit Qi and Lex)
  • Java中的不可变类(Immutable class in Java)
  • WordPress发布查询(WordPress post query)
  • 如何在关系数据库中存储与IPv6兼容的地址(How to store IPv6-compatible address in a relational database)
  • 是否可以检查对象值的条件并返回密钥?(Is it possible to check the condition of a value of an object and JUST return the key?)
  • GEP分段错误LLVM C ++ API(GEP segmentation fault LLVM C++ API)
  • 绑定属性设置器未被调用(Bound Property Setter not getting Called)
  • linux ubuntu14.04版没有那个文件或目录
  • 如何使用JSF EL表达式在param中迭代变量(How to iterate over variable in param using JSF EL expression)
  • 是否有可能在WPF中的一个单独的进程中隔离一些控件?(Is it possible to isolate some controls in a separate process in WPF?)
  • 使用Python 2.7的MSI安装的默认安装目录是什么?(What is the default installation directory with an MSI install of Python 2.7?)
  • 寻求多次出现的表达式(Seeking for more than one occurrence of an expression)
  • ckeditor config.protectedSource不适用于editor.insertHtml上的html元素属性(ckeditor config.protectedSource dont work for html element attributes on editor.insertHtml)
  • linux只知道文件名,不知道在哪个目录,怎么找到文件所在目录
  • Actionscript:检查字符串是否包含域或子域(Actionscript: check if string contains domain or subdomain)
  • 将CouchDB与AJAX一起使用是否安全?(Is it safe to use CouchDB with AJAX?)
  • 懒惰地初始化AutoMapper(Lazily initializing AutoMapper)
  • 使用hasclass为多个div与一个按钮问题(using hasclass for multiple divs with one button Problems)
  • Windows Phone 7:检查资源是否存在(Windows Phone 7: Check If Resource Exists)
  • 无法在新线程中从FREContext调用getActivity()?(Can't call getActivity() from FREContext in a new thread?)
  • 在Alpine上升级到postgres96(/ usr / bin / pg_dump:没有这样的文件或目录)(Upgrade to postgres96 on Alpine (/usr/bin/pg_dump: No such file or directory))
  • 如何按部门显示报告(How to display a report by Department wise)
  • Facebook墙贴在需要访问令牌密钥后无法正常工作(Facebook wall post not working after access token key required)
  • Javascript - 如何在不擦除输入的情况下更改标签的innerText(Javascript - how to change innerText of label while not wiping out the input)
  • WooCommerce / WordPress - 不显示具有特定标题的产品(WooCommerce/WordPress - Products with specific titles are not displayed)