清空筛选条件
清空筛选条件

how to compare last n characters of many strings in matlab?

4 次查看（过去 30 天）
Tejaswini Ramesh
Tejaswini Ramesh 2016-7-29
编辑： Stephen23 2016-7-29
I have a huge number strings stored in cell named 'b'. some names of the signals inside this cell looks like this 'PECCalc_tqElFil2_VW_173', 'PECCtl_bDampCtl_VW_173', 'PECCtl_uDstRipplNrm_VW_171', 'PEC_kWaaDkMEoacAcF33ry86TG5B0BRjIXWbgnK1vt1D2Gc_171', 'time_152', 'time_173',
then I use string compare to get only signals starting with the name PEC using the following.
matcontent = load('w50_2_2.mat');
usefield = strncmpi(fieldnames(matcontent),'PEC',3);
b = fieldnames(matcontent);
matcontent_cell = struct2cell(matcontent);
selectedvariables = matcontent_cell(usefield);
so selectedvariables has all the signals starting only with PEC.
Similarly I want to filter out all the signals ending with _173. How do I do this? How can I use string compare to compare last n characters and segregate those signals? the length of these signals also vary. Please help me! Thanks in advance.

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2016-7-29
编辑：Stephen23 2016-7-29
Use regexp, you can wrap it in a cellfun call to get the indices:
C = {...
'PECCalc_tqElFil2_VW_173'
'PECCtl_bDampCtl_VW_173'
'PECCtl_uDstRipplNrm_VW_171'
'PEC_kWaaDkMEoacAcF33ry86TG5B0BRjIXWbgnK1vt1D2Gc_171'
'time_152'
'time_173'
}
fun = @(str,pat)~cellfun('isempty',regexp(str,pat,'once'));
idxPEC = fun(C,'^PEC')
idx173 = fun(C,'\_173$')
returns these indices:
idxPEC =
1
1
1
1
0
0
idx173 =
1
1
0
0
0
1
  3 个评论
显示 1更早的评论
Tejaswini Ramesh
Tejaswini Ramesh 2016-7-29
please also tell me how to get all the names of the signals when idx173 or idxPEC value is 1. Thank you!

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Characters and Strings 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by