How to replace vector value '0' to NaN( 0 -> Nan)

Question

Jingyu Yang 2020-8-31

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https://ww2.mathworks.cn/matlabcentral/answers/586688-how-to-replace-vector-value-0-to-nan-0-nan

评论： Jingyu Yang 2020-9-6

If my vector is like

For example ) If my vector is like "Distance = { 0 1 2 3 0 4 0 5 0 6 7 8 0 9 10 } "...

And What I want is "Distance = { Nan 1 2 3 Nan 4 Nan 5 Nan 6 7 8 Nan 9 10}";

Literally, I want to change value 0 to value Nan.

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Stephen23 2020-8-31

There does not seem to be any benefit here to using a cell array, your code will be simpler and much more efficient if you just use a basic numeric vector:

https://www.mathworks.com/help/matlab/math/creating-and-concatenating-matrices.html

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Answer 1

Alan Stevens 2020-8-31

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https://ww2.mathworks.cn/matlabcentral/answers/586688-how-to-replace-vector-value-0-to-nan-0-nan#answer_487289

在 MATLAB Online 中打开

>> Distance = [0 1 2 3 0 4 0 5 0 6 7 8 0 9 10]
Distance =
     0     1     2     3     0     4     0     5     0     6     7     8     0     9    10
>> Distance(Distance==0)=NaN
Distance =
   NaN     1     2     3   NaN     4   NaN     5   NaN     6     7     8   NaN     9    10

NB Just use square brackets to define a vector, unless you really want to set it up as a series of cells.

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Vladimir Sovkov 2020-8-31

If the cell array is what really wanted, use the function cell2mat to first convert it to the double array, do with it what Alan recommended, then convert it back to the cell array with the function mat2cell. In the Alan code, if you like it, you can also use Distance(~Distance)=NaN instead of Distance(Distance==0)=NaN.

Jingyu Yang 2020-9-6