Question

我有一个带NaNs的载体：

CREATE TABLE IF NOT EXISTS PERSONS(
  ID INTEGER NOT NULL  AUTO_INCREMENT,
  LAST_NAME VARCHAR(25) NULL,
  FIRST_NAME VARCHAR(25) NULL,
  ADDRESS VARCHAR(25) NULL,
  CITY VARCHAR(25) NULL,
  ZIP_CODE BIGINT(5) NULL,
  TEL VARCHAR(13) NULL,
  PERSON_TYPES ENUM("ADMIN","EXPERT","THIRD_PARTY","CUSTOMER"),
  MAJ TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (ID)
 );

CREATE TABLE IF NOT EXISTS INSUREES(
  ID INTEGER NOT NULL  UNIQUE,
  BONUS_MALUS REAL(5,2) DEFAULT 1.0,
  FOREIGN KEY (ID) REFERENCES PERSONS(ID) ON DELETE CASCADE
);


CREATE TABLE IF NOT EXISTS THIRD_PARTIES(
  ID INTEGER NOT NULL  UNIQUE,
  COMPAGNY VARCHAR(128) NULL,
  FOREIGN KEY (ID) REFERENCES INSUREES(ID) ON DELETE CASCADE
 );


CREATE TABLE IF NOT EXISTS EXPERTS(
  ID INTEGER NOT NULL UNIQUE,
  RANK BIGINT(4) NULL,
  FOREIGN KEY (ID) REFERENCES PERSONS(ID) ON DELETE CASCADE
)comment = "";

 CREATE TABLE IF NOT EXISTS CUSTOMERS(
  ID INTEGER NOT NULL UNIQUE,
  ID_CARD VARCHAR(100),
  SEPA VARCHAR(100),
  FOREIGN KEY(ID) REFERENCES INSUREES(ID) ON DELETE CASCADE
);

 CREATE TABLE IF NOT EXISTS ADMINS(
   ID INTEGER NOT NULL UNIQUE,
   ROLE VARCHAR(128) NULL, 
   FOREIGN KEY (ID) REFERENCES PERSONS(ID) ON DELETE CASCADE
 );

另一个具有不同值的向量：

v1 = [NaN NaN NaN NaN NaN];

和线性索引：

v2 = [1 4 6 8 9];

我想根据线性索引将v2中的值分配给v1，因此结果为：

idx = [1 0 4 0 3];

Answer 1

v1(idx ~= 0) = v2(idx(idx ~= 0))

这需要

＆＃34; v1中的值idx不等于零＆＃34;

并为其指定

中的值

＆＃34; v2，在索引idx，其中idx也不等于零＆＃34;

如何在matlab中使用线性索引为矢量赋值？

1 个答案: