Replace empty string with NaN in a cell

Question

Daneisha Blair 2021-8-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438684-replace-empty-string-with-nan-in-a-cell

评论： Daneisha Blair 2021-8-23

采纳的回答： Stephen23

I have a cell called A={ "20" "25" "25" [] "20" [] "25" "25" "25" "30"}

I would like to replace cell A with A={ "20" "25" "25" "NaN" "20" "NaN" "25" "25" "25" "30"}

Any help is highly appreciate, thank you.

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Answer 1

Stephen23 2021-8-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438684-replace-empty-string-with-nan-in-a-cell#answer_772539

编辑：Stephen23 2021-8-23

在 MATLAB Online 中打开

A = {"20","25","25",[],"20",[],"25","25","25","30"}
A = 1×10 cell array
    {["20"]}    {["25"]}    {["25"]}    {0×0 double}    {["20"]}    {0×0 double}    {["25"]}    {["25"]}    {["25"]}    {["30"]}
A(cellfun(@isempty,A)) = {"NaN"}
A = 1×10 cell array
    {["20"]}    {["25"]}    {["25"]}    {["NaN"]}    {["20"]}    {["NaN"]}    {["25"]}    {["25"]}    {["25"]}    {["30"]}

Using one string array is likely much better than nesting lots of scalar strings inside a cell array:

B = string(A)
B = 1×10 string array
    "20"    "25"    "25"    "NaN"    "20"    "NaN"    "25"    "25"    "25"    "30"

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Daneisha Blair 2021-8-23

This is perfect! Thank you.

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Answer 2

Awais Saeed 2021-8-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438684-replace-empty-string-with-nan-in-a-cell#answer_772549

编辑：Awais Saeed 2021-8-23

在 MATLAB Online 中打开

clc;clear;close all;
A={ "20"	"25"	"25"	[]	"20"	[]	"25"	"25"	"25"	"30"}
% get locations of empty cell elements
idx = cellfun('isempty',A);
% replace those empty cells with NaN
A(idx) = {NaN}