cdflib.deleteVar

删除变量

语法

cdflib.deleteVar(cdfId,varNum)

说明

cdflib.deleteVar(cdfId,varNum) 删除常用数据格式 (CDF) 文件中的变量。

cdfId 标识 CDF 文件。varNum 是指定变量的数值。变量编号从 0 开始。

示例

创建一个 CDF 文件，在该 CDF 文件中创建一个变量，然后删除该变量。

cdfId = cdflib.create("your_file.cdf");

% Initially the file contains no variables
info = cdflib.inquire(cdfId)
info = 

  struct with fields:

     encoding: 'IBMPC_ENCODING'
     majority: 'ROW_MAJOR'
       maxRec: -1
      numVars: 0
    numvAttrs: 0
    numgAttrs: 0
% Create a variable in the file
varNum = cdflib.createVar(cdfId,"Time","cdf_int1",1,[],true,[]);

% Retrieve info about the variable in the CDF
varInfo = cdflib.inquireVar(cdfId,varNum)
varInfo = 

  struct with fields:

           name: 'Time'
       datatype: 'cdf_int1'
    numElements: 1
           dims: []
    recVariance: 1
    dimVariance: []
% Delete the variable from the file
cdflib.deleteVar(cdfId,varNum)

% Check to see if the variable was deleted from the file
info = cdflib.inquire(cdfId)
info = 

  struct with fields:

     encoding: 'IBMPC_ENCODING'
     majority: 'ROW_MAJOR'
       maxRec: -1
      numVars: 0
    numvAttrs: 0
    numgAttrs: 0
% Clean up
cdflib.delete(cdfId)
clear cdfId

提示

  • 此函数对应于 CDF 库的 C API 例程 CDFdeletezVar。

  • 要使用此函数，必须熟悉 CDF C 接口。您可以在 CDF 网站上访问 CDF 文档。

另请参阅

主题