Matlab在单元格数组中查找子字符串 [英] matlab find substring in cell array
问题描述
我尝试在单元格中找到必须在名称中包含"HA"的数组.我在这里找到了一个函数,但不适用于我的问题. 我的手机看起来像这样:
I try to find arrays in my cell which have to part 'HA' in their names. I found a function here but it does not work for my problem. My cell looks like this:
'HA1' 'HA1' 'HA1' 'HA1' 'HA1'
'HA2' 'HA2' 'HA2' 'HA2' 'HA2'
'HA3' 'HA3' 'HA3' 'HA3' 'HA3'
'HA4' 'HA4' 'HA4' 'HA4' 'HA4'
'HA5' 'HA5' 'HA5' 'HA5' 'HA5'
'HA6' 'HA6' 'HA6' 'HA6' 'HA6'
'HA7' 'HA7' 'HA7' 'HA7' 'HA7'
'HA8' 'WA1' 'WA1' 'WA1' 'WA1'
'HA9' 'WA2' 'WA2' 'WA2' 'WA2'
'HA10' 'WA3' 'WA3' 'WA3' 'WA3'
'HA11' 'WA4' 'WA4' 'WA4' 'WA4'
'DA1' 'WA5' 'WA5' 'WA5' 'WA5'
'DA2' [] [] [] 'WA6'
'DA3' [] [] [] 'WA7'
'DA4' [] [] [] 'WA8'
'DA5' [] [] [] 'WA9'
'DA6' [] [] [] 'WA10'
[] [] [] [] 'WA11'
[] [] [] [] 'WA12'
我尝试了此功能:
x = 'HA';
y = cellArray;
substrfind = @(x,y) ~cellfun(@isempty,strfind(y,x));
logicalArray = substrfind(x,y);
我应该获得一个逻辑数组作为输出,这对我的问题确实很有用.但是相反,我收到此错误消息: 如果任何输入参数是单元格数组,则第一个必须是字符串的单元格数组,第二个必须是字符数组."
Im supposed to get a logical array as output which is really useful for my problem. But instead I get this error message: " If any of the input arguments are cell arrays, the first must be a cell array of strings and the second must be a character array."
我不明白错误是什么,因为第一个输入y是一个单元格数组,第二个输入y是一个字符.
I do not understand what the error is because the first input y is a cell array and the second x a character.
我希望你们能帮助我解决我的问题! 谢谢您的期待! 最好的问候
I hope you guys can help me with my problem! Thank you in anticipation! Best regards
推荐答案
假设C
是您的单元格数组.然后,做您想要的事情的一种方法是:
Suppose C
is your cell array. Then one way to do what you want would be this:
>> C(cellfun('isempty', C)) = {''};
>> logicalArray = ~cellfun('isempty', strfind(C, 'HA'))
strfind
不接受某些值不是字符串的单元格数组.您的单元格数组碰巧具有空值,但是错误类型-[]
是double
,而不是char
.这就是您收到该错误的原因.
strfind
does not accept cell arrays of which some values are not strings. Your cell array happens to have empty values, but of the wrong kind -- []
is double
, not char
. That is the reason you get that error.
因此,我只需将每个空的double
替换为空的字符(''
),然后使用strfind
.
So, I simply replace every empty double
with the empty char (''
), and then use strfind
.
解决此问题的另一种方法:
Another way around this problem:
>> logicalArray = cellfun(@(x)~isempty(strfind(x,'HA')), C)
但这要慢很多.
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