在R的矩阵中添加新列 [英] Adding a new column in a matrix in R

问题描述

我有一个1列的矩阵:

> Control_Title_name

vehicle_scan_id4
153 "CL2004060801AA"
155 "CL2004060801AA"
232 "EC2004102602AA"

我想添加一个新列(名为"Class")，如下所示:

I want to add a new column (named "Class") like below:

> Control_Title_name

vehicle_scan_id4 Class
        153 "CL2004060801AA" "Control"
        155 "CL2004060801AA" "Control"
        232 "EC2004102602AA" "Control"

第一列("vehicle_scan_id4")的长度是可变的，因此我希望控件"作为第二列(类")中的值出现在每一行中.

The length of first column ("vehicle_scan_id4") is variable so I want the "Control" appear in each row as a value in second column ("Class").

> Phenodata
    Name                 FileName             Target     
153 "EC2004060203AA.CEL" "EC2004060203AA.CEL" "Treatment"
155 "EC2004060205AA.CEL" "EC2004060205AA.CEL" "Treatment"
232 "EC2004102606AA.CEL" "EC2004102606AA.CEL" "Treatment"
153 "CL2004060801AA.CEL" "CL2004060801AA.CEL" "Control"  
155 "CL2004060801AA.CEL" "CL2004060801AA.CEL" "Control"  
232 "EC2004102602AA.CEL" "EC2004102602AA.CEL" "Control"

这就是我最终矩阵的样子.有没有一种方法，我可以根据唯一行而不根据row.names的值来进行过滤.例如，第4行和第5行包含完全相同的值.我的新矩阵是否可能仅包含其中之一，而不同时包含两者.

This is how my final matrix is looks like. Is there a way that I can filter only the unique rows based on their values not on row.names. For example, 4th and 5th rows contains exactly the same values. Is it possible that my new matrix only contain one of them, not both.

推荐答案

您可以使用

You can use cbind() for this:

Control_Title_name <- matrix(c('CL2004060801AA','CL2004060801AA','EC2004102602AA'),3,dimnames=list(c('153','155','232'),c('vehicle_scan_id4')));
Control_Title_name;
##     vehicle_scan_id4
## 153 "CL2004060801AA"
## 155 "CL2004060801AA"
## 232 "EC2004102602AA"
Control_Title_name <- cbind(Control_Title_name,Class='Control');
Control_Title_name;
##     vehicle_scan_id4 Class
## 153 "CL2004060801AA" "Control"
## 155 "CL2004060801AA" "Control"
## 232 "EC2004102602AA" "Control"

回答第二个问题:

Control_Title_name[,'vehicle_scan_id4'] <- paste0(Control_Title_name[,'vehicle_scan_id4'],'.CEL');
Control_Title_name;
##     vehicle_scan_id4     Class
## 153 "CL2004060801AA.CEL" "Control"
## 155 "CL2004060801AA.CEL" "Control"
## 232 "EC2004102602AA.CEL" "Control"

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