Split a cell that contains a string

Question

Melissa Ette 2020-10-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/625908-split-a-cell-that-contains-a-string

评论： Melissa Ette 2020-10-26

采纳的回答： Cris LaPierre

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I have a cell u(38,1) each row has string looking like this :

for example u{1,1} = ''198823 765389 white''

u{2,1} = ''198426 725312 black''

I want the cell u to be divided in 3 colomns such as

u{1,1} = ''198823'' u{1,2}= ''765389'' u{1,3}=''white''

u{2,1} = ''198426'' u{2,1}= ''725312'' u{2,3}=''black''

so basically I want my u(38,1) to become u(38,3)

I have tried strplit, but it seems like it won't work with a cell,

strplit(u,',') %doesn't work'
strplit(u{1,1},',') %works on the first line and returns a cell (1,3)

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Answer 1

Cris LaPierre 2020-10-26

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https://ww2.mathworks.cn/matlabcentral/answers/625908-split-a-cell-that-contains-a-string#answer_524293

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Look into cellfun. This will apply a function to each cell in the cell array.

Here's an example of one way of doing this.

u{1,1} = "198823 765389 white";
u{2,1} = "198426 725312 black"
u = 2x1 cell array
    {["198823 765389 white"]}
    {["198426 725312 black"]}
a=cellfun(@strsplit,u,'UniformOutput',false);
a=vertcat(a{:})
a = 2×3 string array
    "198823"    "765389"    "white"
    "198426"    "725312"    "black"

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Cris LaPierre 2020-10-26

编辑：Cris LaPierre 2020-10-26

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Actually, why keep this a cell? This can be done much simpler if you use strings.

u{1,1} = "198823 765389 white";
u{2,1} = "198426 725312 black"
u = 2x1 cell array
    {["198823 765389 white"]}
    {["198426 725312 black"]}
% Convert cell array to a string array.
u2 = string(u)
u2 = 2×1 string array
    "198823 765389 white"
    "198426 725312 black"
a2 = split(u2)
a2 = 2×3 string array
    "198823"    "765389"    "white"
    "198426"    "725312"    "black"